/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 NUM_VARIABLES --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/Addition01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:28:20,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:28:20,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:28:20,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:28:20,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:28:20,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:28:20,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:28:20,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:28:20,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:28:20,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:28:20,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:28:20,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:28:20,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:28:20,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:28:20,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:28:20,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:28:20,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:28:20,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:28:20,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:28:20,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:28:20,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:28:20,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:28:20,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:28:20,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:28:20,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:28:20,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:28:20,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:28:20,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:28:20,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 16:28:20,788 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:28:20,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:28:20,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:28:20,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:28:20,790 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:28:20,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:28:20,790 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:28:20,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:28:20,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:28:20,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:28:20,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:28:20,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:28:20,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:28:20,792 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:28:20,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:28:20,792 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:28:20,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:28:20,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:28:20,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:28:20,793 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:28:20,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:28:20,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:28:20,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:28:20,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:28:20,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:28:20,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:28:20,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:20,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:28:20,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:28:20,796 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 -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:28:21,097 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:28:21,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:28:21,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:28:21,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:28:21,123 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:28:21,125 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition01-2.c [2020-07-20 16:28:21,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0adb9ae99/124475175e10455c8894cf8d875238ee/FLAGd44636437 [2020-07-20 16:28:21,574 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:28:21,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition01-2.c [2020-07-20 16:28:21,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0adb9ae99/124475175e10455c8894cf8d875238ee/FLAGd44636437 [2020-07-20 16:28:21,985 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0adb9ae99/124475175e10455c8894cf8d875238ee [2020-07-20 16:28:21,996 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:28:21,999 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:28:22,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:28:22,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:28:22,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:28:22,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:21" (1/1) ... [2020-07-20 16:28:22,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fca7f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:22, skipping insertion in model container [2020-07-20 16:28:22,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:21" (1/1) ... [2020-07-20 16:28:22,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:28:22,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:28:22,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:28:22,195 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:28:22,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:28:22,225 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:28:22,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:22 WrapperNode [2020-07-20 16:28:22,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:28:22,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:28:22,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:28:22,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:28:22,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:22" (1/1) ... [2020-07-20 16:28:22,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:22" (1/1) ... [2020-07-20 16:28:22,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:22" (1/1) ... [2020-07-20 16:28:22,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:22" (1/1) ... [2020-07-20 16:28:22,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:22" (1/1) ... [2020-07-20 16:28:22,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:22" (1/1) ... [2020-07-20 16:28:22,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:22" (1/1) ... [2020-07-20 16:28:22,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:28:22,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:28:22,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:28:22,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:28:22,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:28:22,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:28:22,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:28:22,397 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-07-20 16:28:22,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:28:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:28:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:28:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-07-20 16:28:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:28:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:28:22,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:28:22,736 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:28:22,737 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:28:22,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:22 BoogieIcfgContainer [2020-07-20 16:28:22,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:28:22,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:28:22,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:28:22,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:28:22,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:28:21" (1/3) ... [2020-07-20 16:28:22,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13088f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:22, skipping insertion in model container [2020-07-20 16:28:22,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:22" (2/3) ... [2020-07-20 16:28:22,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13088f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:22, skipping insertion in model container [2020-07-20 16:28:22,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:22" (3/3) ... [2020-07-20 16:28:22,749 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2020-07-20 16:28:22,760 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:28:22,767 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:28:22,782 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:28:22,806 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:28:22,806 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:28:22,806 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:28:22,806 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:28:22,807 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:28:22,807 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:28:22,807 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:28:22,807 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:28:22,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-20 16:28:22,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 16:28:22,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:22,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:22,844 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:22,850 INFO L82 PathProgramCache]: Analyzing trace with hash -854965079, now seen corresponding path program 1 times [2020-07-20 16:28:22,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:22,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493856141] [2020-07-20 16:28:22,858 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:22,921 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:22,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:22,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 16:28:22,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:28:23,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:23,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493856141] [2020-07-20 16:28:23,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:23,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 16:28:23,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489689881] [2020-07-20 16:28:23,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 16:28:23,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:23,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 16:28:23,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:28:23,065 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-07-20 16:28:23,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:23,225 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-07-20 16:28:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:28:23,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-20 16:28:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:23,239 INFO L225 Difference]: With dead ends: 38 [2020-07-20 16:28:23,239 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 16:28:23,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:28:23,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 16:28:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 16:28:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 16:28:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-20 16:28:23,291 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-20 16:28:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:23,292 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-20 16:28:23,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 16:28:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-20 16:28:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 16:28:23,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:23,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:23,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:23,509 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:23,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1632999070, now seen corresponding path program 1 times [2020-07-20 16:28:23,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:23,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105044429] [2020-07-20 16:28:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:23,540 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:28:23,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:23,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 16:28:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:28:23,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:23,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105044429] [2020-07-20 16:28:23,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:23,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 16:28:23,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493815179] [2020-07-20 16:28:23,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 16:28:23,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:23,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 16:28:23,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:28:23,584 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-07-20 16:28:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:23,616 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-07-20 16:28:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 16:28:23,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-20 16:28:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:23,618 INFO L225 Difference]: With dead ends: 34 [2020-07-20 16:28:23,618 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 16:28:23,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:28:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 16:28:23,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-20 16:28:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 16:28:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-20 16:28:23,628 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-07-20 16:28:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:23,629 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-20 16:28:23,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 16:28:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-20 16:28:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 16:28:23,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:23,631 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:23,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:23,844 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:23,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1746800232, now seen corresponding path program 1 times [2020-07-20 16:28:23,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:23,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649474321] [2020-07-20 16:28:23,847 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:23,883 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:23,886 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 16:28:23,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 16:28:23,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:24,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:28:24,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649474321] [2020-07-20 16:28:24,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:24,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-20 16:28:24,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101179533] [2020-07-20 16:28:24,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 16:28:24,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:24,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 16:28:24,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:28:24,314 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 14 states. [2020-07-20 16:28:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:24,536 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-20 16:28:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:28:24,536 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-07-20 16:28:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:24,538 INFO L225 Difference]: With dead ends: 36 [2020-07-20 16:28:24,538 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 16:28:24,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:28:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 16:28:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-20 16:28:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 16:28:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-20 16:28:24,547 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2020-07-20 16:28:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:24,547 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-20 16:28:24,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 16:28:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-20 16:28:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 16:28:24,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:24,549 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:24,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:24,764 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:24,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1365148867, now seen corresponding path program 1 times [2020-07-20 16:28:24,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:24,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735332371] [2020-07-20 16:28:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:24,794 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:24,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:24,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 16:28:24,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 16:28:24,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:25,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:28:25,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735332371] [2020-07-20 16:28:25,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:25,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-20 16:28:25,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390184104] [2020-07-20 16:28:25,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 16:28:25,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 16:28:25,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:28:25,136 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 14 states. [2020-07-20 16:28:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:25,378 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-07-20 16:28:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:28:25,378 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-07-20 16:28:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:25,380 INFO L225 Difference]: With dead ends: 39 [2020-07-20 16:28:25,380 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 16:28:25,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:28:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 16:28:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-07-20 16:28:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 16:28:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-20 16:28:25,388 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 23 [2020-07-20 16:28:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:25,389 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-20 16:28:25,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 16:28:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-20 16:28:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 16:28:25,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:25,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:25,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:25,605 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:25,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:25,606 INFO L82 PathProgramCache]: Analyzing trace with hash -716524734, now seen corresponding path program 1 times [2020-07-20 16:28:25,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:25,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865647575] [2020-07-20 16:28:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:25,638 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:25,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:25,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 16:28:25,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 16:28:25,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:26,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:26,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:26,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:26,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:28:26,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865647575] [2020-07-20 16:28:26,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:26,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 16 [2020-07-20 16:28:26,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256808239] [2020-07-20 16:28:26,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 16:28:26,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:26,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 16:28:26,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:28:26,170 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 16 states. [2020-07-20 16:28:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:26,478 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-07-20 16:28:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 16:28:26,478 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-07-20 16:28:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:26,481 INFO L225 Difference]: With dead ends: 48 [2020-07-20 16:28:26,481 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 16:28:26,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-20 16:28:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 16:28:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-07-20 16:28:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 16:28:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-07-20 16:28:26,492 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 30 [2020-07-20 16:28:26,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:26,492 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-07-20 16:28:26,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 16:28:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-07-20 16:28:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 16:28:26,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:26,494 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:26,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:26,701 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1459427924, now seen corresponding path program 2 times [2020-07-20 16:28:26,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:26,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350829877] [2020-07-20 16:28:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:26,732 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:26,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:26,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 16:28:26,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 16:28:26,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:27,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:27,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:28:27,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350829877] [2020-07-20 16:28:27,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:27,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 16 [2020-07-20 16:28:27,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46292961] [2020-07-20 16:28:27,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 16:28:27,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:27,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 16:28:27,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:28:27,270 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 16 states. [2020-07-20 16:28:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:27,568 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-07-20 16:28:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 16:28:27,568 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-07-20 16:28:27,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:27,570 INFO L225 Difference]: With dead ends: 57 [2020-07-20 16:28:27,570 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 16:28:27,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-20 16:28:27,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 16:28:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-07-20 16:28:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 16:28:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-07-20 16:28:27,582 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 30 [2020-07-20 16:28:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:27,583 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-07-20 16:28:27,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 16:28:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-07-20 16:28:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 16:28:27,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:27,585 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:27,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:27,801 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1144343065, now seen corresponding path program 3 times [2020-07-20 16:28:27,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:27,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111774298] [2020-07-20 16:28:27,802 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 [2020-07-20 16:28:27,831 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:27,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:27,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 53 conjunts are in the unsatisfiable core [2020-07-20 16:28:27,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:28:27,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:28,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:28,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:28,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:28,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111774298] [2020-07-20 16:28:28,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:28,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 19 [2020-07-20 16:28:28,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117119563] [2020-07-20 16:28:28,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 16:28:28,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:28,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 16:28:28,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:28:28,651 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 19 states. [2020-07-20 16:28:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:29,032 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2020-07-20 16:28:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 16:28:29,033 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-07-20 16:28:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:29,036 INFO L225 Difference]: With dead ends: 72 [2020-07-20 16:28:29,036 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 16:28:29,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:28:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 16:28:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2020-07-20 16:28:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 16:28:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-07-20 16:28:29,048 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 37 [2020-07-20 16:28:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:29,048 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-07-20 16:28:29,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 16:28:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-07-20 16:28:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 16:28:29,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:29,050 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:29,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:29,259 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:29,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2039645464, now seen corresponding path program 4 times [2020-07-20 16:28:29,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:29,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138373262] [2020-07-20 16:28:29,261 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 [2020-07-20 16:28:29,294 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:29,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:29,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 53 conjunts are in the unsatisfiable core [2020-07-20 16:28:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 16:28:29,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:29,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:30,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:30,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:30,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:30,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:30,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138373262] [2020-07-20 16:28:30,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:30,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 19 [2020-07-20 16:28:30,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132108160] [2020-07-20 16:28:30,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 16:28:30,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:30,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 16:28:30,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:28:30,160 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 19 states. [2020-07-20 16:28:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:30,573 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2020-07-20 16:28:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 16:28:30,574 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-07-20 16:28:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:30,576 INFO L225 Difference]: With dead ends: 75 [2020-07-20 16:28:30,576 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 16:28:30,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:28:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 16:28:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2020-07-20 16:28:30,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 16:28:30,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-07-20 16:28:30,588 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 38 [2020-07-20 16:28:30,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:30,589 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-07-20 16:28:30,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 16:28:30,589 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-07-20 16:28:30,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 16:28:30,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:30,591 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:30,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:30,805 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:30,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:30,806 INFO L82 PathProgramCache]: Analyzing trace with hash 796879128, now seen corresponding path program 5 times [2020-07-20 16:28:30,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:30,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582429742] [2020-07-20 16:28:30,808 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 [2020-07-20 16:28:30,847 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:28:30,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:30,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:28:30,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-20 16:28:30,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:30,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582429742] [2020-07-20 16:28:30,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:30,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 16:28:30,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637163243] [2020-07-20 16:28:30,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 16:28:30,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:30,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 16:28:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 16:28:30,908 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 8 states. [2020-07-20 16:28:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:31,031 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2020-07-20 16:28:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:28:31,031 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-07-20 16:28:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:31,033 INFO L225 Difference]: With dead ends: 79 [2020-07-20 16:28:31,033 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 16:28:31,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:28:31,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 16:28:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-07-20 16:28:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 16:28:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 16:28:31,041 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 44 [2020-07-20 16:28:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:31,041 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 16:28:31,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 16:28:31,041 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 16:28:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 16:28:31,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:31,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:31,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:31,251 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:31,252 INFO L82 PathProgramCache]: Analyzing trace with hash 333735380, now seen corresponding path program 6 times [2020-07-20 16:28:31,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:31,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451734716] [2020-07-20 16:28:31,253 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 [2020-07-20 16:28:31,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:31,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:31,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-20 16:28:31,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 16:28:31,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:32,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:32,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:32,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:32,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:32,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:32,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:32,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:32,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 16:28:32,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451734716] [2020-07-20 16:28:32,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:32,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 22 [2020-07-20 16:28:32,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580815496] [2020-07-20 16:28:32,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 16:28:32,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:32,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 16:28:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-07-20 16:28:32,555 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 22 states. [2020-07-20 16:28:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:32,995 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-07-20 16:28:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 16:28:32,996 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-07-20 16:28:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:32,998 INFO L225 Difference]: With dead ends: 47 [2020-07-20 16:28:32,998 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 16:28:32,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2020-07-20 16:28:32,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 16:28:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 16:28:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 16:28:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-07-20 16:28:33,004 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 46 [2020-07-20 16:28:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:33,005 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-07-20 16:28:33,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 16:28:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-07-20 16:28:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 16:28:33,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:33,007 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:33,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:33,221 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:33,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1909160088, now seen corresponding path program 7 times [2020-07-20 16:28:33,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:33,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405049730] [2020-07-20 16:28:33,222 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 [2020-07-20 16:28:33,263 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:33,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:33,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 77 conjunts are in the unsatisfiable core [2020-07-20 16:28:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-07-20 16:28:33,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:34,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 16:28:34,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405049730] [2020-07-20 16:28:34,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:34,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 25 [2020-07-20 16:28:34,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673878037] [2020-07-20 16:28:34,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:28:34,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:34,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:28:34,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:28:34,931 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 25 states. [2020-07-20 16:28:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:35,553 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-07-20 16:28:35,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 16:28:35,554 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-07-20 16:28:35,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:35,555 INFO L225 Difference]: With dead ends: 50 [2020-07-20 16:28:35,556 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 16:28:35,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 16:28:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 16:28:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-20 16:28:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 16:28:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-07-20 16:28:35,562 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 54 [2020-07-20 16:28:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:35,563 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-07-20 16:28:35,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:28:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-07-20 16:28:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 16:28:35,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:35,564 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:35,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:35,774 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash -274722476, now seen corresponding path program 8 times [2020-07-20 16:28:35,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:35,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866302592] [2020-07-20 16:28:35,776 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 [2020-07-20 16:28:35,822 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:35,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:35,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 89 conjunts are in the unsatisfiable core [2020-07-20 16:28:35,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-20 16:28:36,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:36,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:37,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:37,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:37,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:37,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:37,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:37,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:37,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:37,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:37,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 16:28:38,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866302592] [2020-07-20 16:28:38,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:38,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24] total 28 [2020-07-20 16:28:38,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610960715] [2020-07-20 16:28:38,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 16:28:38,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:38,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 16:28:38,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2020-07-20 16:28:38,056 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 28 states. [2020-07-20 16:28:38,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:38,819 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-07-20 16:28:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 16:28:38,820 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-07-20 16:28:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:38,822 INFO L225 Difference]: With dead ends: 53 [2020-07-20 16:28:38,822 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 16:28:38,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 16:28:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 16:28:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-20 16:28:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 16:28:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-07-20 16:28:38,828 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 62 [2020-07-20 16:28:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:38,829 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-07-20 16:28:38,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 16:28:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-07-20 16:28:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-20 16:28:38,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:38,830 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:39,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:39,037 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:39,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1724173336, now seen corresponding path program 9 times [2020-07-20 16:28:39,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:39,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273173818] [2020-07-20 16:28:39,039 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:39,106 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:39,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:39,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 101 conjunts are in the unsatisfiable core [2020-07-20 16:28:39,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-07-20 16:28:39,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:40,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:40,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 148 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 16:28:41,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273173818] [2020-07-20 16:28:41,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:41,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 31 [2020-07-20 16:28:41,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887584789] [2020-07-20 16:28:41,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 16:28:41,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:41,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 16:28:41,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2020-07-20 16:28:41,998 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 31 states. [2020-07-20 16:28:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:42,764 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-07-20 16:28:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 16:28:42,769 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-07-20 16:28:42,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:42,770 INFO L225 Difference]: With dead ends: 56 [2020-07-20 16:28:42,770 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 16:28:42,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=286, Invalid=1876, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 16:28:42,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 16:28:42,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 16:28:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 16:28:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-07-20 16:28:42,785 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 70 [2020-07-20 16:28:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:42,786 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-07-20 16:28:42,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 16:28:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-07-20 16:28:42,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 16:28:42,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:42,789 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:43,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:43,002 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:43,002 INFO L82 PathProgramCache]: Analyzing trace with hash 996678868, now seen corresponding path program 10 times [2020-07-20 16:28:43,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:43,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38816500] [2020-07-20 16:28:43,003 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:43,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:43,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:43,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 113 conjunts are in the unsatisfiable core [2020-07-20 16:28:43,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-20 16:28:43,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:44,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:45,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:45,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:45,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:45,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:45,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:45,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:45,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:45,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:45,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:46,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:46,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:46,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:46,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:46,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:46,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 197 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-20 16:28:46,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38816500] [2020-07-20 16:28:46,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:46,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30] total 34 [2020-07-20 16:28:46,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105697351] [2020-07-20 16:28:46,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 16:28:46,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:46,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 16:28:46,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 16:28:46,697 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 34 states. [2020-07-20 16:28:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:47,634 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-07-20 16:28:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 16:28:47,635 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2020-07-20 16:28:47,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:47,636 INFO L225 Difference]: With dead ends: 59 [2020-07-20 16:28:47,636 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 16:28:47,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 115 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=338, Invalid=2314, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 16:28:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 16:28:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-20 16:28:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 16:28:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-07-20 16:28:47,647 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 78 [2020-07-20 16:28:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:47,647 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-07-20 16:28:47,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 16:28:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-07-20 16:28:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 16:28:47,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:47,649 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:47,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:47,861 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:47,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1263108200, now seen corresponding path program 11 times [2020-07-20 16:28:47,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:47,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976403437] [2020-07-20 16:28:47,863 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:47,941 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:47,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:47,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 125 conjunts are in the unsatisfiable core [2020-07-20 16:28:47,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-20 16:28:48,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:49,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:50,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:50,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:50,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:50,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:51,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:51,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:51,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:51,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:51,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:51,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:51,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:52,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:52,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:52,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:52,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:52,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:52,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:52,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-20 16:28:52,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976403437] [2020-07-20 16:28:52,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:52,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 37 [2020-07-20 16:28:52,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633075696] [2020-07-20 16:28:52,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 16:28:52,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:52,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 16:28:52,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 16:28:52,419 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 37 states. [2020-07-20 16:28:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:53,695 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-07-20 16:28:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 16:28:53,696 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 86 [2020-07-20 16:28:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:53,697 INFO L225 Difference]: With dead ends: 62 [2020-07-20 16:28:53,697 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 16:28:53,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 126 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=394, Invalid=2798, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 16:28:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 16:28:53,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-20 16:28:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 16:28:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-07-20 16:28:53,704 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 86 [2020-07-20 16:28:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:53,705 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-07-20 16:28:53,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 16:28:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-07-20 16:28:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 16:28:53,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:53,706 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:53,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:53,920 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:53,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2121566292, now seen corresponding path program 12 times [2020-07-20 16:28:53,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:53,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567589548] [2020-07-20 16:28:53,922 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:54,014 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:54,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:54,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 137 conjunts are in the unsatisfiable core [2020-07-20 16:28:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2020-07-20 16:28:54,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:56,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:56,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:57,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:57,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:57,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:57,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:58,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:58,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:58,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:58,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:58,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:58,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:58,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:58,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:59,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:59,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 2 proven. 316 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-20 16:28:59,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567589548] [2020-07-20 16:28:59,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:59,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 36] total 40 [2020-07-20 16:28:59,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866891996] [2020-07-20 16:28:59,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 16:28:59,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:59,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 16:28:59,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 16:28:59,356 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 40 states. [2020-07-20 16:29:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:00,838 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-07-20 16:29:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 16:29:00,839 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-07-20 16:29:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:00,840 INFO L225 Difference]: With dead ends: 65 [2020-07-20 16:29:00,840 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 16:29:00,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 141 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=454, Invalid=3328, Unknown=0, NotChecked=0, Total=3782 [2020-07-20 16:29:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 16:29:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-20 16:29:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 16:29:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-07-20 16:29:00,847 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 94 [2020-07-20 16:29:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:00,848 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-07-20 16:29:00,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 16:29:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-07-20 16:29:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-20 16:29:00,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:00,850 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:01,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:01,063 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:01,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1378315496, now seen corresponding path program 13 times [2020-07-20 16:29:01,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:01,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901716684] [2020-07-20 16:29:01,065 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:01,175 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:01,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:01,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 149 conjunts are in the unsatisfiable core [2020-07-20 16:29:01,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2020-07-20 16:29:01,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:03,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:04,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:04,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:05,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:05,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:05,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:05,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:06,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:06,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:06,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:06,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:07,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:07,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:07,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:07,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:07,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:07,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:07,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:07,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:07,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:07,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 2 proven. 386 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 16:29:07,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901716684] [2020-07-20 16:29:07,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:07,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 39] total 43 [2020-07-20 16:29:07,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117327193] [2020-07-20 16:29:07,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 16:29:07,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:07,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 16:29:07,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1696, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 16:29:07,800 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 43 states. [2020-07-20 16:29:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:09,372 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-07-20 16:29:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 16:29:09,373 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 102 [2020-07-20 16:29:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:09,375 INFO L225 Difference]: With dead ends: 68 [2020-07-20 16:29:09,375 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 16:29:09,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 151 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=518, Invalid=3904, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 16:29:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 16:29:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 16:29:09,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 16:29:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-07-20 16:29:09,381 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 102 [2020-07-20 16:29:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:09,382 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-07-20 16:29:09,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-20 16:29:09,382 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-07-20 16:29:09,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-20 16:29:09,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:09,383 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:09,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:09,598 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:09,599 INFO L82 PathProgramCache]: Analyzing trace with hash -167947308, now seen corresponding path program 14 times [2020-07-20 16:29:09,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:09,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946316582] [2020-07-20 16:29:09,600 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:09,734 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:09,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:09,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 161 conjunts are in the unsatisfiable core [2020-07-20 16:29:09,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-07-20 16:29:10,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:12,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:13,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:13,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:13,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:13,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:13,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:13,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:14,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:14,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:14,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:15,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:15,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:17,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:17,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:17,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:17,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:17,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:17,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:17,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:17,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:17,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 2 proven. 463 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 16:29:17,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946316582] [2020-07-20 16:29:17,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:17,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 42] total 46 [2020-07-20 16:29:17,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026474050] [2020-07-20 16:29:17,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-20 16:29:17,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-20 16:29:17,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 16:29:17,535 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 46 states. [2020-07-20 16:29:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:19,627 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-07-20 16:29:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 16:29:19,628 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 110 [2020-07-20 16:29:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:19,629 INFO L225 Difference]: With dead ends: 71 [2020-07-20 16:29:19,630 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 16:29:19,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 161 SyntacticMatches, 14 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=586, Invalid=4526, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 16:29:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 16:29:19,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-20 16:29:19,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 16:29:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-07-20 16:29:19,639 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 110 [2020-07-20 16:29:19,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:19,640 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-07-20 16:29:19,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-20 16:29:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-07-20 16:29:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-20 16:29:19,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:19,642 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:19,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:19,855 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:19,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:19,856 INFO L82 PathProgramCache]: Analyzing trace with hash -442697368, now seen corresponding path program 15 times [2020-07-20 16:29:19,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:19,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805481697] [2020-07-20 16:29:19,856 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:20,012 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:20,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:20,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 173 conjunts are in the unsatisfiable core [2020-07-20 16:29:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2020-07-20 16:29:20,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:22,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:23,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:23,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:23,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:24,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:24,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:24,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:25,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:25,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:26,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:26,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:26,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:28,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:28,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:28,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:28,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:28,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:28,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:28,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:28,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:28,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 2 proven. 547 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-07-20 16:29:29,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805481697] [2020-07-20 16:29:29,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:29,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 45] total 49 [2020-07-20 16:29:29,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391775808] [2020-07-20 16:29:29,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-20 16:29:29,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:29,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-20 16:29:29,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2226, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 16:29:29,130 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 49 states. [2020-07-20 16:29:31,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:31,207 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-07-20 16:29:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 16:29:31,208 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 118 [2020-07-20 16:29:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:31,209 INFO L225 Difference]: With dead ends: 74 [2020-07-20 16:29:31,209 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 16:29:31,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=658, Invalid=5194, Unknown=0, NotChecked=0, Total=5852 [2020-07-20 16:29:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 16:29:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-20 16:29:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 16:29:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-07-20 16:29:31,218 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 118 [2020-07-20 16:29:31,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:31,220 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-07-20 16:29:31,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-20 16:29:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-07-20 16:29:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 16:29:31,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:31,221 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:31,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:31,434 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:31,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:31,434 INFO L82 PathProgramCache]: Analyzing trace with hash 356155220, now seen corresponding path program 16 times [2020-07-20 16:29:31,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:31,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028801506] [2020-07-20 16:29:31,435 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:31,611 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:31,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:31,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 185 conjunts are in the unsatisfiable core [2020-07-20 16:29:31,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-07-20 16:29:32,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:34,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:35,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:36,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:38,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:42,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:42,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:42,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:42,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 2 proven. 638 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-07-20 16:29:42,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028801506] [2020-07-20 16:29:42,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:42,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 48] total 52 [2020-07-20 16:29:42,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403231424] [2020-07-20 16:29:42,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-20 16:29:42,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-20 16:29:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 16:29:42,379 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 52 states. [2020-07-20 16:29:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:44,721 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-07-20 16:29:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-20 16:29:44,722 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 126 [2020-07-20 16:29:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:44,723 INFO L225 Difference]: With dead ends: 77 [2020-07-20 16:29:44,723 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 16:29:44,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 13 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=734, Invalid=5908, Unknown=0, NotChecked=0, Total=6642 [2020-07-20 16:29:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 16:29:44,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-07-20 16:29:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 16:29:44,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-07-20 16:29:44,729 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 126 [2020-07-20 16:29:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:44,729 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-07-20 16:29:44,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-20 16:29:44,729 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-07-20 16:29:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-20 16:29:44,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:44,731 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:44,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:44,939 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:44,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:44,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1198663144, now seen corresponding path program 17 times [2020-07-20 16:29:44,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:44,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486570102] [2020-07-20 16:29:44,941 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:45,147 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:45,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:45,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 197 conjunts are in the unsatisfiable core [2020-07-20 16:29:45,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 329 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-07-20 16:29:46,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:48,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:49,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:50,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:51,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:51,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:51,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:52,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:54,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:54,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:54,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:54,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:55,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:55,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:55,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:56,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:56,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:56,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:56,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:56,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:56,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:56,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:57,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:57,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:57,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:57,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:57,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 2 proven. 736 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-07-20 16:29:57,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486570102] [2020-07-20 16:29:57,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:57,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 51] total 55 [2020-07-20 16:29:57,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78499927] [2020-07-20 16:29:57,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-20 16:29:57,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:57,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-20 16:29:57,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2828, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 16:29:57,760 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 55 states. [2020-07-20 16:30:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:00,519 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2020-07-20 16:30:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 16:30:00,520 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 134 [2020-07-20 16:30:00,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:00,521 INFO L225 Difference]: With dead ends: 80 [2020-07-20 16:30:00,521 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 16:30:00,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 203 SyntacticMatches, 11 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=814, Invalid=6668, Unknown=0, NotChecked=0, Total=7482 [2020-07-20 16:30:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 16:30:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-07-20 16:30:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 16:30:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-07-20 16:30:00,527 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 134 [2020-07-20 16:30:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:00,528 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-07-20 16:30:00,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-20 16:30:00,528 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-07-20 16:30:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 16:30:00,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:00,529 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:00,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:00,742 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:00,742 INFO L82 PathProgramCache]: Analyzing trace with hash 90442452, now seen corresponding path program 18 times [2020-07-20 16:30:00,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:00,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531489528] [2020-07-20 16:30:00,743 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:00,985 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:30:00,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:00,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 209 conjunts are in the unsatisfiable core [2020-07-20 16:30:00,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 0 proven. 375 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2020-07-20 16:30:02,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:05,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:06,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:07,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:08,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:09,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:10,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:10,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:10,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:11,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:12,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:12,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:12,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:12,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:12,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:12,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:13,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:13,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:13,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:14,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:14,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:14,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:14,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:14,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:14,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:14,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:15,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:15,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:15,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:15,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:15,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-20 16:30:15,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531489528] [2020-07-20 16:30:15,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:15,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 54] total 58 [2020-07-20 16:30:15,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097577746] [2020-07-20 16:30:15,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-20 16:30:15,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-20 16:30:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3156, Unknown=0, NotChecked=0, Total=3306 [2020-07-20 16:30:15,983 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 58 states. [2020-07-20 16:30:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:19,267 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-07-20 16:30:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-20 16:30:19,270 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 142 [2020-07-20 16:30:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:19,273 INFO L225 Difference]: With dead ends: 83 [2020-07-20 16:30:19,273 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 16:30:19,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 216 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=898, Invalid=7474, Unknown=0, NotChecked=0, Total=8372 [2020-07-20 16:30:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 16:30:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-07-20 16:30:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 16:30:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-07-20 16:30:19,283 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 142 [2020-07-20 16:30:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:19,287 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-07-20 16:30:19,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-20 16:30:19,287 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-07-20 16:30:19,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-20 16:30:19,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:19,288 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:19,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:19,489 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1131344488, now seen corresponding path program 19 times [2020-07-20 16:30:19,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:19,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312106152] [2020-07-20 16:30:19,490 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:19,782 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:30:19,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:19,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 221 conjunts are in the unsatisfiable core [2020-07-20 16:30:19,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 424 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-20 16:30:21,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:24,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:25,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:27,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:28,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:29,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:30,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:31,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:31,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:31,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:32,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:33,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:33,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:33,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:34,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:34,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:34,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:34,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:34,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:34,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:35,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:35,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:35,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:35,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:36,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:36,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:36,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:36,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:36,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:37,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:37,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:37,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 2 proven. 953 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-07-20 16:30:37,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312106152] [2020-07-20 16:30:37,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:37,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 57] total 61 [2020-07-20 16:30:37,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014480088] [2020-07-20 16:30:37,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-20 16:30:37,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:37,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-20 16:30:37,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=3502, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 16:30:37,328 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 61 states. [2020-07-20 16:30:41,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:41,149 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2020-07-20 16:30:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-20 16:30:41,150 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 150 [2020-07-20 16:30:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:41,152 INFO L225 Difference]: With dead ends: 86 [2020-07-20 16:30:41,152 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 16:30:41,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 227 SyntacticMatches, 13 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=986, Invalid=8326, Unknown=0, NotChecked=0, Total=9312 [2020-07-20 16:30:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 16:30:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-07-20 16:30:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 16:30:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-07-20 16:30:41,158 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 150 [2020-07-20 16:30:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:41,158 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-07-20 16:30:41,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-20 16:30:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-07-20 16:30:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-07-20 16:30:41,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:41,160 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:41,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:41,372 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:41,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:41,373 INFO L82 PathProgramCache]: Analyzing trace with hash 632419924, now seen corresponding path program 20 times [2020-07-20 16:30:41,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:41,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654616518] [2020-07-20 16:30:41,373 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:41,696 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:30:41,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:41,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 233 conjunts are in the unsatisfiable core [2020-07-20 16:30:41,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 0 proven. 476 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2020-07-20 16:30:43,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:47,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:48,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:48,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:48,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:50,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:50,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:50,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:51,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:53,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:53,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:53,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:54,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:55,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:55,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:55,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:56,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:56,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:56,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:57,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:57,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:57,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:58,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:00,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:00,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:00,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:00,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:00,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:00,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:01,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:01,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:01,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:01,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:02,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:02,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 2 proven. 1072 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-20 16:31:02,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654616518] [2020-07-20 16:31:02,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:31:02,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 60] total 64 [2020-07-20 16:31:02,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377937631] [2020-07-20 16:31:02,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-20 16:31:02,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:31:02,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-20 16:31:02,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3866, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 16:31:02,531 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 64 states. [2020-07-20 16:31:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:31:07,058 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-07-20 16:31:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-20 16:31:07,060 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 158 [2020-07-20 16:31:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:31:07,062 INFO L225 Difference]: With dead ends: 89 [2020-07-20 16:31:07,062 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 16:31:07,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 241 SyntacticMatches, 12 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1078, Invalid=9224, Unknown=0, NotChecked=0, Total=10302 [2020-07-20 16:31:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 16:31:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-07-20 16:31:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 16:31:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-07-20 16:31:07,068 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 158 [2020-07-20 16:31:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:31:07,069 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-07-20 16:31:07,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-20 16:31:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-07-20 16:31:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-07-20 16:31:07,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:31:07,070 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:31:07,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:31:07,279 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:31:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:31:07,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1352966424, now seen corresponding path program 21 times [2020-07-20 16:31:07,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:31:07,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398798541] [2020-07-20 16:31:07,280 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:31:07,642 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:31:07,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:31:07,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 245 conjunts are in the unsatisfiable core [2020-07-20 16:31:07,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:31:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 0 proven. 531 refuted. 0 times theorem prover too weak. 859 trivial. 0 not checked. [2020-07-20 16:31:09,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:31:13,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:15,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:15,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:15,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:17,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:19,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:19,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:19,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:20,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:22,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:22,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:22,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:23,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:24,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:24,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:24,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:25,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:26,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:26,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:26,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:27,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:27,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:27,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:28,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:29,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:30,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:30,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:30,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:30,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:30,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:30,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:31,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:31,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:31,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:31,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:32,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:32,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 2 proven. 1198 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-07-20 16:31:32,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398798541] [2020-07-20 16:31:32,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:31:32,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 63] total 67 [2020-07-20 16:31:32,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136364381] [2020-07-20 16:31:32,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-20 16:31:32,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:31:32,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-20 16:31:32,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4248, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 16:31:32,906 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 67 states. [2020-07-20 16:31:38,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:31:38,412 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-07-20 16:31:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-20 16:31:38,414 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 166 [2020-07-20 16:31:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:31:38,415 INFO L225 Difference]: With dead ends: 92 [2020-07-20 16:31:38,416 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 16:31:38,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 252 SyntacticMatches, 14 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1174, Invalid=10168, Unknown=0, NotChecked=0, Total=11342 [2020-07-20 16:31:38,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 16:31:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-07-20 16:31:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 16:31:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-07-20 16:31:38,422 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 166 [2020-07-20 16:31:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:31:38,422 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-07-20 16:31:38,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-20 16:31:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-07-20 16:31:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-07-20 16:31:38,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:31:38,424 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:31:38,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:31:38,636 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:31:38,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:31:38,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1956888108, now seen corresponding path program 22 times [2020-07-20 16:31:38,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:31:38,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8557809] [2020-07-20 16:31:38,637 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:31:39,061 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:31:39,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:31:39,065 WARN L261 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 257 conjunts are in the unsatisfiable core [2020-07-20 16:31:39,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:31:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1543 backedges. 0 proven. 589 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2020-07-20 16:31:41,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:31:47,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:49,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:49,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:49,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:51,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:53,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:53,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:53,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:55,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:56,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:56,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:56,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:58,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:58,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:58,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:59,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:59,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:59,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:01,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:01,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:01,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:02,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:03,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:05,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:06,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:06,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:06,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:07,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:08,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:08,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:08,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:08,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:08,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:08,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:09,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:09,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:09,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:10,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:10,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:10,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:10,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:10,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:10,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:10,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:10,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:10,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1543 backedges. 2 proven. 1331 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-07-20 16:32:11,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8557809] [2020-07-20 16:32:11,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:32:11,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 66] total 70 [2020-07-20 16:32:11,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372977611] [2020-07-20 16:32:11,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-20 16:32:11,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:11,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-20 16:32:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=4648, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 16:32:11,203 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 70 states. [2020-07-20 16:32:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:18,358 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-07-20 16:32:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-20 16:32:18,360 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 174 [2020-07-20 16:32:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:18,361 INFO L225 Difference]: With dead ends: 95 [2020-07-20 16:32:18,361 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 16:32:18,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 263 SyntacticMatches, 16 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1274, Invalid=11158, Unknown=0, NotChecked=0, Total=12432 [2020-07-20 16:32:18,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 16:32:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-07-20 16:32:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-20 16:32:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-07-20 16:32:18,366 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 174 [2020-07-20 16:32:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:18,367 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-07-20 16:32:18,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-20 16:32:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-07-20 16:32:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-07-20 16:32:18,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:18,368 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:18,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:18,571 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:18,571 INFO L82 PathProgramCache]: Analyzing trace with hash -352359576, now seen corresponding path program 23 times [2020-07-20 16:32:18,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:18,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656881359] [2020-07-20 16:32:18,574 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:19,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:32:19,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:19,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 269 conjunts are in the unsatisfiable core [2020-07-20 16:32:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2020-07-20 16:32:22,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:32:27,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:30,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:30,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:30,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:32,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:35,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:37,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:39,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:42,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:44,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:45,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:47,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:47,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:47,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:49,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:49,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:49,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:50,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:50,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:50,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:52,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:52,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:52,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:53,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:54,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:54,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:54,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:55,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:55,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:55,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:56,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:57,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:57,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:58,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:58,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:58,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:58,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 2 proven. 1471 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-07-20 16:32:59,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656881359] [2020-07-20 16:32:59,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:32:59,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 69] total 73 [2020-07-20 16:32:59,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769010375] [2020-07-20 16:32:59,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-20 16:32:59,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:59,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-20 16:32:59,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5066, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 16:32:59,274 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 73 states. [2020-07-20 16:33:08,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:33:08,237 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2020-07-20 16:33:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-20 16:33:08,240 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 182 [2020-07-20 16:33:08,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:33:08,241 INFO L225 Difference]: With dead ends: 98 [2020-07-20 16:33:08,241 INFO L226 Difference]: Without dead ends: 86 [2020-07-20 16:33:08,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 274 SyntacticMatches, 18 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1378, Invalid=12194, Unknown=0, NotChecked=0, Total=13572 [2020-07-20 16:33:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-20 16:33:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-07-20 16:33:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-20 16:33:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-07-20 16:33:08,247 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 182 [2020-07-20 16:33:08,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:33:08,247 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-07-20 16:33:08,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-20 16:33:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-07-20 16:33:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-20 16:33:08,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:33:08,249 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:33:08,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:33:08,460 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:33:08,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:33:08,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2120553132, now seen corresponding path program 24 times [2020-07-20 16:33:08,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:33:08,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704113200] [2020-07-20 16:33:08,461 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:33:08,996 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:33:08,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:33:09,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 281 conjunts are in the unsatisfiable core [2020-07-20 16:33:09,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:33:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 1159 trivial. 0 not checked. [2020-07-20 16:33:13,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:33:20,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:23,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:23,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:23,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:25,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:25,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:25,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:28,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:28,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:28,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:31,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:31,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:31,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:34,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:34,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:34,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:37,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:39,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:39,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:39,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:41,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:41,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:41,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:43,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:45,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:47,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:49,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:51,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:52,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:52,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:52,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:53,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:53,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:53,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:55,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:56,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:56,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:56,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:57,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:57,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:57,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:57,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:58,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:58,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:58,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:58,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 2 proven. 1618 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-07-20 16:33:59,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704113200] [2020-07-20 16:33:59,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:33:59,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 72] total 76 [2020-07-20 16:33:59,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988435568] [2020-07-20 16:33:59,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-07-20 16:33:59,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:33:59,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-07-20 16:33:59,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=5502, Unknown=0, NotChecked=0, Total=5700 [2020-07-20 16:33:59,480 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 76 states. [2020-07-20 16:34:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:34:09,738 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2020-07-20 16:34:09,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-20 16:34:09,742 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 190 [2020-07-20 16:34:09,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:34:09,743 INFO L225 Difference]: With dead ends: 101 [2020-07-20 16:34:09,744 INFO L226 Difference]: Without dead ends: 89 [2020-07-20 16:34:09,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 289 SyntacticMatches, 16 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=1486, Invalid=13276, Unknown=0, NotChecked=0, Total=14762 [2020-07-20 16:34:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-20 16:34:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-07-20 16:34:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-20 16:34:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-07-20 16:34:09,749 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 190 [2020-07-20 16:34:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:34:09,750 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-07-20 16:34:09,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-07-20 16:34:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-07-20 16:34:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-07-20 16:34:09,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:34:09,751 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:34:09,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:34:09,965 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:34:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:34:09,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1612912616, now seen corresponding path program 25 times [2020-07-20 16:34:09,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:34:09,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033205497] [2020-07-20 16:34:09,966 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:34:10,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:34:10,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:34:10,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 293 conjunts are in the unsatisfiable core [2020-07-20 16:34:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:34:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2050 backedges. 0 proven. 781 refuted. 0 times theorem prover too weak. 1269 trivial. 0 not checked. [2020-07-20 16:34:15,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:34:24,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:27,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:31,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:34,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:34,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:34,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:37,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:41,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:44,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:46,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:49,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:49,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:49,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:51,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:54,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:54,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:54,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:56,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:58,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:58,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:58,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:00,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:00,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:00,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:02,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:02,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:02,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:03,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:05,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:05,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:05,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:07,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:08,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:08,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:08,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:09,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:09,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:09,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:10,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:10,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:10,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:11,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:11,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:11,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:11,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2050 backedges. 2 proven. 1772 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-07-20 16:35:12,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033205497] [2020-07-20 16:35:12,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:35:12,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 75] total 79 [2020-07-20 16:35:12,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220814652] [2020-07-20 16:35:12,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-07-20 16:35:12,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:35:12,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-07-20 16:35:12,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=5956, Unknown=0, NotChecked=0, Total=6162 [2020-07-20 16:35:12,140 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 79 states. [2020-07-20 16:35:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:35:24,011 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-07-20 16:35:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-20 16:35:24,015 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 198 [2020-07-20 16:35:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:35:24,016 INFO L225 Difference]: With dead ends: 104 [2020-07-20 16:35:24,017 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 16:35:24,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 300 SyntacticMatches, 18 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=1598, Invalid=14404, Unknown=0, NotChecked=0, Total=16002 [2020-07-20 16:35:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 16:35:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-07-20 16:35:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 16:35:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-07-20 16:35:24,023 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 198 [2020-07-20 16:35:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:35:24,024 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-07-20 16:35:24,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-07-20 16:35:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-07-20 16:35:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-20 16:35:24,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:35:24,026 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:35:24,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:35:24,228 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:35:24,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:35:24,229 INFO L82 PathProgramCache]: Analyzing trace with hash 161872084, now seen corresponding path program 26 times [2020-07-20 16:35:24,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:35:24,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232884372] [2020-07-20 16:35:24,229 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:35:24,913 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:35:24,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:35:24,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 305 conjunts are in the unsatisfiable core [2020-07-20 16:35:24,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:35:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 851 refuted. 0 times theorem prover too weak. 1384 trivial. 0 not checked. [2020-07-20 16:35:30,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:35:40,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:45,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:45,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:45,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:49,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:53,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:57,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:01,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:05,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:08,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:11,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:14,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:17,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:17,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:17,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:20,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:20,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:20,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:22,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:22,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:22,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:24,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:27,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:27,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:27,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:28,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:28,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:28,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:30,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:30,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:30,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:32,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:33,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:35,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:35,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:35,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:36,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:37,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:37,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:37,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:37,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:37,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:37,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:38,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:38,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:38,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 2 proven. 1933 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-07-20 16:36:38,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232884372] [2020-07-20 16:36:38,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:36:38,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 78] total 82 [2020-07-20 16:36:38,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385094701] [2020-07-20 16:36:38,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-07-20 16:36:38,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:36:38,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-07-20 16:36:38,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=6428, Unknown=0, NotChecked=0, Total=6642 [2020-07-20 16:36:38,865 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 82 states. [2020-07-20 16:36:55,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:36:55,665 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-07-20 16:36:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-20 16:36:55,672 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 206 [2020-07-20 16:36:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:36:55,673 INFO L225 Difference]: With dead ends: 107 [2020-07-20 16:36:55,673 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 16:36:55,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 313 SyntacticMatches, 18 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=1714, Invalid=15578, Unknown=0, NotChecked=0, Total=17292 [2020-07-20 16:36:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 16:36:55,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-07-20 16:36:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 16:36:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-07-20 16:36:55,680 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 206 [2020-07-20 16:36:55,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:36:55,680 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-07-20 16:36:55,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-07-20 16:36:55,680 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-07-20 16:36:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-07-20 16:36:55,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:36:55,692 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:36:55,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:36:55,908 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:36:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:36:55,909 INFO L82 PathProgramCache]: Analyzing trace with hash 42886248, now seen corresponding path program 27 times [2020-07-20 16:36:55,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:36:55,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224000699] [2020-07-20 16:36:55,910 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:36:56,704 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:36:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:36:56,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 317 conjunts are in the unsatisfiable core [2020-07-20 16:36:56,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:37:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 1504 trivial. 0 not checked. [2020-07-20 16:37:04,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:37:15,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:21,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:21,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:21,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:25,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:30,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:30,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:30,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:35,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:35,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:35,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:39,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:43,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:47,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:50,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:54,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:54,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:54,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:58,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:58,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:58,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:01,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:01,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:01,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:04,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:04,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:04,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:06,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:09,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:09,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:09,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:12,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:14,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:14,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:14,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:16,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:18,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:19,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:19,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:19,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:21,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:21,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:21,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:22,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:22,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:22,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:23,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:23,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:23,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:24,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:24,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:24,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:24,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 2 proven. 2101 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-07-20 16:38:25,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224000699] [2020-07-20 16:38:25,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:38:25,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 81] total 85 [2020-07-20 16:38:25,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326689699] [2020-07-20 16:38:25,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-07-20 16:38:25,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:38:25,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-07-20 16:38:25,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=6918, Unknown=0, NotChecked=0, Total=7140 [2020-07-20 16:38:25,671 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 85 states. [2020-07-20 16:38:44,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:38:44,504 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2020-07-20 16:38:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-07-20 16:38:44,509 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 214 [2020-07-20 16:38:44,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:38:44,511 INFO L225 Difference]: With dead ends: 110 [2020-07-20 16:38:44,511 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 16:38:44,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 327 SyntacticMatches, 17 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=1834, Invalid=16798, Unknown=0, NotChecked=0, Total=18632 [2020-07-20 16:38:44,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 16:38:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-20 16:38:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 16:38:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-07-20 16:38:44,517 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 214 [2020-07-20 16:38:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:38:44,517 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-07-20 16:38:44,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-07-20 16:38:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-07-20 16:38:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-07-20 16:38:44,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:38:44,519 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:38:44,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:38:44,723 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:38:44,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:38:44,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1521837140, now seen corresponding path program 28 times [2020-07-20 16:38:44,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:38:44,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300726439] [2020-07-20 16:38:44,725 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:38:45,577 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:38:45,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:38:45,584 WARN L261 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 329 conjunts are in the unsatisfiable core [2020-07-20 16:38:45,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:38:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2629 backedges. 0 proven. 1000 refuted. 0 times theorem prover too weak. 1629 trivial. 0 not checked. [2020-07-20 16:38:53,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:39:06,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:07,802 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 16:39:12,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:17,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:17,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:17,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:22,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:22,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:22,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:27,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:31,143 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:39:33,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:33,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:33,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:38,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:38,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:38,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:43,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:47,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:51,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:51,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:51,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:55,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:59,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:03,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:06,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:06,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:06,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:09,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:09,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:09,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:12,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:15,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:15,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:15,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:17,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:17,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:17,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:19,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:21,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:23,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:23,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:23,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:25,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:26,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:27,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:28,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:29,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2629 backedges. 2 proven. 2276 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-07-20 16:40:30,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300726439] [2020-07-20 16:40:30,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:40:30,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 84] total 88 [2020-07-20 16:40:30,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765160917] [2020-07-20 16:40:30,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-07-20 16:40:30,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:40:30,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-07-20 16:40:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=7426, Unknown=0, NotChecked=0, Total=7656 [2020-07-20 16:40:30,047 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 88 states. [2020-07-20 16:40:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:40:49,550 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-07-20 16:40:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-20 16:40:49,556 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 222 [2020-07-20 16:40:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:40:49,558 INFO L225 Difference]: With dead ends: 113 [2020-07-20 16:40:49,558 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 16:40:49,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 337 SyntacticMatches, 20 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=1958, Invalid=18064, Unknown=0, NotChecked=0, Total=20022 [2020-07-20 16:40:49,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 16:40:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-07-20 16:40:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 16:40:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-07-20 16:40:49,564 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 222 [2020-07-20 16:40:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:40:49,565 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-07-20 16:40:49,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-07-20 16:40:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-07-20 16:40:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-07-20 16:40:49,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:40:49,566 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:40:49,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:40:49,767 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:40:49,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:40:49,768 INFO L82 PathProgramCache]: Analyzing trace with hash -804695832, now seen corresponding path program 29 times [2020-07-20 16:40:49,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:40:49,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824152164] [2020-07-20 16:40:49,769 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:40:50,700 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:40:50,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:40:50,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 341 conjunts are in the unsatisfiable core [2020-07-20 16:40:50,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:41:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 1079 refuted. 0 times theorem prover too weak. 1759 trivial. 0 not checked. [2020-07-20 16:41:00,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:41:02,020 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 16:41:02,333 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:02,647 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:02,963 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:03,282 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:03,887 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:04,201 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:04,514 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:04,838 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:05,151 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:05,457 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:05,771 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:06,106 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:06,437 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:06,763 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:07,078 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:07,404 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:07,727 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:08,047 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:08,370 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:08,697 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:09,326 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:09,640 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:11,673 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:11,991 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 16:41:12,610 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:12,929 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:13,252 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:13,575 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:18,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:22,107 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:25,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:31,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:31,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:31,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:37,191 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:41:38,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:44,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:44,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:44,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:50,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:50,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:50,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:56,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:56,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:56,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:02,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts