/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:29:25,744 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 22:29:25,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:29:25,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:29:25,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:29:25,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:29:25,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:29:25,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:29:25,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:29:25,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:29:25,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:29:25,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:29:25,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:29:25,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:29:25,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:29:25,799 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 22:29:25,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:29:25,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:29:25,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:29:25,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:29:25,820 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:29:25,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:29:25,820 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:29:25,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:29:25,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:29:25,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:29:25,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:29:25,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:29:25,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:29:25,822 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:29:25,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:29:25,822 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:29:25,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:29:25,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:29:25,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:29:25,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:29:25,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:29:25,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:29:25,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:29:25,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:29:25,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:29:25,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:29:25,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:25,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:29:25,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:29:25,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:29:26,108 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:29:26,128 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:29:26,133 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:29:26,134 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:29:26,135 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:29:26,135 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-20 22:29:26,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcc7633a5/a89417e09ee14401a04adcafc14e036f/FLAG37707151a [2020-07-20 22:29:26,709 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:29:26,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-20 22:29:26,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcc7633a5/a89417e09ee14401a04adcafc14e036f/FLAG37707151a [2020-07-20 22:29:27,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcc7633a5/a89417e09ee14401a04adcafc14e036f [2020-07-20 22:29:27,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:29:27,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:29:27,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:29:27,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:29:27,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:29:27,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:29:27" (1/1) ... [2020-07-20 22:29:27,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ea730f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:27, skipping insertion in model container [2020-07-20 22:29:27,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:29:27" (1/1) ... [2020-07-20 22:29:27,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:29:27,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:29:27,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:29:27,358 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:29:27,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:29:27,392 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:29:27,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:27 WrapperNode [2020-07-20 22:29:27,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:29:27,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:29:27,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:29:27,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:29:27,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:27" (1/1) ... [2020-07-20 22:29:27,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:27" (1/1) ... [2020-07-20 22:29:27,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:27" (1/1) ... [2020-07-20 22:29:27,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:27" (1/1) ... [2020-07-20 22:29:27,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:27" (1/1) ... [2020-07-20 22:29:27,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:27" (1/1) ... [2020-07-20 22:29:27,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:27" (1/1) ... [2020-07-20 22:29:27,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:29:27,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:29:27,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:29:27,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:29:27,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:27" (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 22:29:27,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:29:27,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:29:27,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:29:27,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:29:27,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:29:27,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:29:27,590 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:29:27,590 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:29:27,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:29:27,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:29:27,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:29:27,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:29:27,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:29:27,845 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:29:27,845 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:29:27,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:29:27 BoogieIcfgContainer [2020-07-20 22:29:27,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:29:27,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:29:27,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:29:27,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:29:27,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:29:27" (1/3) ... [2020-07-20 22:29:27,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7ee810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:29:27, skipping insertion in model container [2020-07-20 22:29:27,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:27" (2/3) ... [2020-07-20 22:29:27,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7ee810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:29:27, skipping insertion in model container [2020-07-20 22:29:27,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:29:27" (3/3) ... [2020-07-20 22:29:27,864 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-07-20 22:29:27,878 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:29:27,887 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:29:27,907 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:29:27,962 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:29:27,963 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:29:27,963 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:29:27,963 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:29:27,963 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:29:27,963 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:29:27,964 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:29:27,964 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:29:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 22:29:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 22:29:28,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:28,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:28,005 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-07-20 22:29:28,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:28,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284451744] [2020-07-20 22:29:28,018 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 22:29:28,094 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:28,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:28,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:29:28,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:28,152 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:28,199 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 22:29:28,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:28,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284451744] [2020-07-20 22:29:28,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:28,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:29:28,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353011737] [2020-07-20 22:29:28,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:29:28,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:28,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:29:28,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:29:28,221 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 5 states. [2020-07-20 22:29:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:28,386 INFO L93 Difference]: Finished difference Result 68 states and 99 transitions. [2020-07-20 22:29:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:29:28,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 22:29:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:28,403 INFO L225 Difference]: With dead ends: 68 [2020-07-20 22:29:28,404 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 22:29:28,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:29:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 22:29:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 22:29:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 22:29:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-07-20 22:29:28,469 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 14 [2020-07-20 22:29:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:28,469 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-07-20 22:29:28,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:29:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-07-20 22:29:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 22:29:28,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:28,472 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:28,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:28,674 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:28,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-07-20 22:29:28,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:28,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568308147] [2020-07-20 22:29:28,676 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 22:29:28,732 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:28,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:29:28,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:28,784 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:28,788 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:29:28,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:28,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568308147] [2020-07-20 22:29:28,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:28,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:29:28,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151061420] [2020-07-20 22:29:28,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:29:28,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:28,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:29:28,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:29:28,813 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-07-20 22:29:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:28,965 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-07-20 22:29:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:29:28,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 22:29:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:28,968 INFO L225 Difference]: With dead ends: 48 [2020-07-20 22:29:28,968 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 22:29:28,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:29:28,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 22:29:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-20 22:29:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 22:29:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-07-20 22:29:28,985 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-07-20 22:29:28,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:28,985 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-07-20 22:29:28,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:29:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-07-20 22:29:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 22:29:28,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:28,989 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:29,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:29,203 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:29,204 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-07-20 22:29:29,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:29,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019454520] [2020-07-20 22:29:29,205 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 22:29:29,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:29,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:29:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:29,270 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:29:29,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:29,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019454520] [2020-07-20 22:29:29,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:29,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:29:29,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787428091] [2020-07-20 22:29:29,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:29:29,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:29,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:29:29,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:29:29,292 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-07-20 22:29:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:29,429 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-07-20 22:29:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:29:29,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-20 22:29:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:29,432 INFO L225 Difference]: With dead ends: 55 [2020-07-20 22:29:29,432 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 22:29:29,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:29:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 22:29:29,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-07-20 22:29:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 22:29:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-07-20 22:29:29,453 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-07-20 22:29:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:29,454 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-07-20 22:29:29,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:29:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-07-20 22:29:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 22:29:29,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:29,456 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:29,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:29,657 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:29,658 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-07-20 22:29:29,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:29,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99853918] [2020-07-20 22:29:29,660 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 22:29:29,690 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:29,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:29:29,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:29,741 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:29,743 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 22:29:29,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:29,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99853918] [2020-07-20 22:29:29,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:29,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 22:29:29,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471642975] [2020-07-20 22:29:29,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 22:29:29,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:29,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 22:29:29,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:29:29,778 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-07-20 22:29:29,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:29,958 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-20 22:29:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:29:29,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-20 22:29:29,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:29,961 INFO L225 Difference]: With dead ends: 70 [2020-07-20 22:29:29,961 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 22:29:29,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:29:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 22:29:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-20 22:29:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 22:29:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-07-20 22:29:29,975 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-07-20 22:29:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:29,976 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-07-20 22:29:29,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 22:29:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-07-20 22:29:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 22:29:29,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:29,978 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 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 22:29:30,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:30,191 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:30,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:30,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-07-20 22:29:30,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:30,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544756484] [2020-07-20 22:29:30,193 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 22:29:30,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:30,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:30,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:29:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:30,269 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:30,270 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 22:29:30,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:30,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544756484] [2020-07-20 22:29:30,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:30,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 22:29:30,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671688406] [2020-07-20 22:29:30,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:29:30,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:30,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:29:30,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:29:30,296 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-07-20 22:29:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:30,465 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-07-20 22:29:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 22:29:30,465 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-07-20 22:29:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:30,466 INFO L225 Difference]: With dead ends: 72 [2020-07-20 22:29:30,467 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 22:29:30,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:29:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 22:29:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-07-20 22:29:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 22:29:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-07-20 22:29:30,480 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-07-20 22:29:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:30,481 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-07-20 22:29:30,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:29:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-07-20 22:29:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 22:29:30,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:30,483 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:29:30,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:30,698 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:30,699 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-07-20 22:29:30,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:30,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444175998] [2020-07-20 22:29:30,700 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 22:29:30,739 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:30,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 22:29:30,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:30,868 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:29:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 22:29:30,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:30,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 22:29:31,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444175998] [2020-07-20 22:29:31,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:31,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-07-20 22:29:31,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873016705] [2020-07-20 22:29:31,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 22:29:31,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:31,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 22:29:31,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-07-20 22:29:31,032 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 13 states. [2020-07-20 22:29:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:31,580 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-07-20 22:29:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 22:29:31,580 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-07-20 22:29:31,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:31,583 INFO L225 Difference]: With dead ends: 110 [2020-07-20 22:29:31,583 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 22:29:31,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-07-20 22:29:31,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 22:29:31,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-07-20 22:29:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 22:29:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2020-07-20 22:29:31,601 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 56 [2020-07-20 22:29:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:31,602 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2020-07-20 22:29:31,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 22:29:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2020-07-20 22:29:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 22:29:31,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:31,605 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:31,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:31,812 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:31,813 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-07-20 22:29:31,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:31,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059405021] [2020-07-20 22:29:31,814 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 22:29:31,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:31,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:31,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 22:29:31,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:31,921 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:31,922 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 22:29:31,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:31,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 22:29:32,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059405021] [2020-07-20 22:29:32,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:32,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-20 22:29:32,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63818510] [2020-07-20 22:29:32,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 22:29:32,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:32,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 22:29:32,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:29:32,028 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 12 states. [2020-07-20 22:29:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:32,283 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2020-07-20 22:29:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:29:32,285 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-07-20 22:29:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:32,290 INFO L225 Difference]: With dead ends: 93 [2020-07-20 22:29:32,293 INFO L226 Difference]: Without dead ends: 91 [2020-07-20 22:29:32,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 22:29:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-20 22:29:32,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-07-20 22:29:32,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 22:29:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-07-20 22:29:32,317 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 58 [2020-07-20 22:29:32,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:32,317 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-07-20 22:29:32,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 22:29:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-07-20 22:29:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-20 22:29:32,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:32,321 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:32,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:32,534 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:32,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:32,534 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-07-20 22:29:32,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:32,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401570301] [2020-07-20 22:29:32,535 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 22:29:32,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:32,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:32,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 22:29:32,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:32,830 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:32,832 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 22:29:32,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:32,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:32,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:33,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:33,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:33,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:33,105 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 22:29:33,114 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 22:29:33,204 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 22:29:33,213 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 22:29:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 22:29:33,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401570301] [2020-07-20 22:29:33,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:33,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2020-07-20 22:29:33,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622379454] [2020-07-20 22:29:33,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 22:29:33,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:33,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 22:29:33,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-07-20 22:29:33,325 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 25 states. [2020-07-20 22:29:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:34,651 INFO L93 Difference]: Finished difference Result 146 states and 190 transitions. [2020-07-20 22:29:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 22:29:34,652 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 83 [2020-07-20 22:29:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:34,655 INFO L225 Difference]: With dead ends: 146 [2020-07-20 22:29:34,655 INFO L226 Difference]: Without dead ends: 144 [2020-07-20 22:29:34,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=431, Invalid=1291, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 22:29:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-20 22:29:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-07-20 22:29:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 22:29:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 137 transitions. [2020-07-20 22:29:34,676 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 137 transitions. Word has length 83 [2020-07-20 22:29:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:34,677 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 137 transitions. [2020-07-20 22:29:34,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 22:29:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 137 transitions. [2020-07-20 22:29:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 22:29:34,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:34,681 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:34,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:34,895 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:34,896 INFO L82 PathProgramCache]: Analyzing trace with hash 314554042, now seen corresponding path program 2 times [2020-07-20 22:29:34,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:34,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953090351] [2020-07-20 22:29:34,896 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 22:29:34,961 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:34,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:34,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 22:29:34,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:35,150 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:29:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 22:29:35,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:35,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:35,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:35,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:35,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:35,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:35,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:35,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:35,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:35,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:29:35,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:35,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:35,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:35,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:35,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:35,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:35,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:35,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:35,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-20 22:29:35,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953090351] [2020-07-20 22:29:35,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:35,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2020-07-20 22:29:35,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343309137] [2020-07-20 22:29:35,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 22:29:35,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:35,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 22:29:35,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-07-20 22:29:35,490 INFO L87 Difference]: Start difference. First operand 112 states and 137 transitions. Second operand 21 states. [2020-07-20 22:29:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:36,575 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2020-07-20 22:29:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 22:29:36,575 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2020-07-20 22:29:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:36,578 INFO L225 Difference]: With dead ends: 171 [2020-07-20 22:29:36,579 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 22:29:36,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 22:29:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 22:29:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139. [2020-07-20 22:29:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-07-20 22:29:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2020-07-20 22:29:36,600 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 106 [2020-07-20 22:29:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:36,600 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2020-07-20 22:29:36,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 22:29:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2020-07-20 22:29:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-07-20 22:29:36,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:36,604 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:36,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:36,817 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:36,818 INFO L82 PathProgramCache]: Analyzing trace with hash 335068695, now seen corresponding path program 3 times [2020-07-20 22:29:36,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:36,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827960922] [2020-07-20 22:29:36,819 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 22:29:36,896 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:36,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:36,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 22:29:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:37,589 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:37,590 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 46 proven. 135 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-20 22:29:37,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:37,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:37,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:37,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:37,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:37,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:38,026 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 22:29:38,032 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 22:29:38,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:38,039 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 22:29:38,039 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-20 22:29:38,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:38,136 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 22:29:38,146 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 22:29:38,212 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 22:29:38,216 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 22:29:38,313 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 22:29:38,319 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 22:29:38,320 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-20 22:29:38,320 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 22:29:38,381 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 22:29:38,382 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-20 22:29:38,382 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-20 22:29:38,389 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 5 conjuncts [2020-07-20 22:29:38,507 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 5 conjuncts [2020-07-20 22:29:38,519 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 5 conjuncts [2020-07-20 22:29:38,588 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 22:29:38,597 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 22:29:38,598 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[7, 6, 1] term [2020-07-20 22:29:38,598 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 6 conjuncts [2020-07-20 22:29:38,731 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 22:29:38,737 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 22:29:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 46 proven. 135 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-20 22:29:38,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827960922] [2020-07-20 22:29:38,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:38,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 43 [2020-07-20 22:29:38,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681607028] [2020-07-20 22:29:38,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 22:29:38,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 22:29:38,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1421, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 22:29:38,916 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand 43 states. [2020-07-20 22:29:43,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:43,236 INFO L93 Difference]: Finished difference Result 213 states and 283 transitions. [2020-07-20 22:29:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-20 22:29:43,237 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 158 [2020-07-20 22:29:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:43,240 INFO L225 Difference]: With dead ends: 213 [2020-07-20 22:29:43,240 INFO L226 Difference]: Without dead ends: 211 [2020-07-20 22:29:43,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 271 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1379, Invalid=4941, Unknown=0, NotChecked=0, Total=6320 [2020-07-20 22:29:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-20 22:29:43,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 178. [2020-07-20 22:29:43,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-20 22:29:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 228 transitions. [2020-07-20 22:29:43,265 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 228 transitions. Word has length 158 [2020-07-20 22:29:43,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:43,268 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 228 transitions. [2020-07-20 22:29:43,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-20 22:29:43,268 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 228 transitions. [2020-07-20 22:29:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-20 22:29:43,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:43,279 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:43,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:43,494 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:43,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:43,495 INFO L82 PathProgramCache]: Analyzing trace with hash 254282874, now seen corresponding path program 3 times [2020-07-20 22:29:43,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:43,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618672587] [2020-07-20 22:29:43,496 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 22:29:43,559 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:43,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:43,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 22:29:43,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:43,945 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:29:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 62 proven. 203 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 22:29:44,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:44,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:29:44,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:29:44,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:29:44,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:29:44,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:29:44,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:29:44,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:44,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:29:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 62 proven. 203 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 22:29:44,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618672587] [2020-07-20 22:29:44,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:44,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2020-07-20 22:29:44,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173315883] [2020-07-20 22:29:44,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 22:29:44,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:44,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 22:29:44,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=896, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 22:29:44,950 INFO L87 Difference]: Start difference. First operand 178 states and 228 transitions. Second operand 37 states. [2020-07-20 22:29:47,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:47,073 INFO L93 Difference]: Finished difference Result 267 states and 370 transitions. [2020-07-20 22:29:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 22:29:47,074 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 206 [2020-07-20 22:29:47,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:47,077 INFO L225 Difference]: With dead ends: 267 [2020-07-20 22:29:47,077 INFO L226 Difference]: Without dead ends: 231 [2020-07-20 22:29:47,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 373 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1051, Invalid=2371, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 22:29:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-07-20 22:29:47,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 223. [2020-07-20 22:29:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-20 22:29:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 284 transitions. [2020-07-20 22:29:47,104 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 284 transitions. Word has length 206 [2020-07-20 22:29:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:47,104 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 284 transitions. [2020-07-20 22:29:47,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 22:29:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 284 transitions. [2020-07-20 22:29:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-07-20 22:29:47,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:47,111 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:47,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:47,324 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:47,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1435695799, now seen corresponding path program 4 times [2020-07-20 22:29:47,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:47,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242949784] [2020-07-20 22:29:47,326 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 22:29:47,412 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:47,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:47,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-20 22:29:47,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:50,267 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:50,268 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5012 backedges. 94 proven. 594 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-07-20 22:29:50,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:50,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:51,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:51,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:51,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:51,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:51,250 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 22:29:51,254 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 22:29:51,412 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 22:29:51,426 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 22:29:51,499 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 22:29:51,504 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 22:29:51,662 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 22:29:51,679 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 22:29:51,764 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 22:29:51,764 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-20 22:29:51,764 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-20 22:29:51,768 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 22:29:51,769 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-20 22:29:51,770 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-20 22:29:51,949 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-20 22:29:51,950 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-20 22:29:51,951 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-20 22:29:51,961 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 5 conjuncts [2020-07-20 22:29:52,070 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 22:29:52,077 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 22:29:52,289 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 22:29:52,290 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[7, 6, 1] term [2020-07-20 22:29:52,291 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 6 conjuncts [2020-07-20 22:29:52,298 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-20 22:29:52,413 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts [2020-07-20 22:29:52,422 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 22:29:52,426 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[8, 7, 1] term [2020-07-20 22:29:52,427 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 7 conjuncts [2020-07-20 22:29:52,640 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts [2020-07-20 22:29:52,647 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-20 22:29:52,648 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[8, 7, 1] term [2020-07-20 22:29:52,649 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 7 conjuncts [2020-07-20 22:29:52,763 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-20 22:29:52,764 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-20 22:29:52,765 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-20 22:29:52,777 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-20 22:29:52,778 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-20 22:29:52,779 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-20 22:29:53,012 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 8 conjuncts [2020-07-20 22:29:53,024 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 8 conjuncts [2020-07-20 22:29:53,156 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 2 conjuncts [2020-07-20 22:29:53,157 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[10, 9, 1] term [2020-07-20 22:29:53,157 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 9 conjuncts [2020-07-20 22:29:53,164 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 2 conjuncts [2020-07-20 22:29:53,165 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[10, 9, 1] term [2020-07-20 22:29:53,165 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 9 conjuncts [2020-07-20 22:29:53,405 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-20 22:29:53,413 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-20 22:29:53,579 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 2 conjuncts [2020-07-20 22:29:53,580 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[11, 10, 1] term [2020-07-20 22:29:53,581 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 10 conjuncts [2020-07-20 22:29:53,589 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 2 conjuncts [2020-07-20 22:29:53,590 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[11, 10, 1] term [2020-07-20 22:29:53,591 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 10 conjuncts [2020-07-20 22:29:53,901 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 2 conjuncts [2020-07-20 22:29:53,902 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[11, 10, 1] term [2020-07-20 22:29:53,902 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 10 conjuncts [2020-07-20 22:29:53,912 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 2 conjuncts [2020-07-20 22:29:53,913 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[11, 10, 1] term [2020-07-20 22:29:53,914 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 10 conjuncts [2020-07-20 22:29:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5012 backedges. 94 proven. 594 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2020-07-20 22:29:54,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242949784] [2020-07-20 22:29:54,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:54,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 71 [2020-07-20 22:29:54,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537500446] [2020-07-20 22:29:54,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-07-20 22:29:54,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:54,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-07-20 22:29:54,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=4212, Unknown=0, NotChecked=0, Total=4970 [2020-07-20 22:29:54,383 INFO L87 Difference]: Start difference. First operand 223 states and 284 transitions. Second operand 71 states. [2020-07-20 22:29:59,034 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-07-20 22:29:59,369 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 22:29:59,650 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 22:29:59,967 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 22:30:00,286 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 22:30:00,535 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 22:30:00,778 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 22:30:01,027 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 22:30:01,231 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 22:30:03,485 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 22:30:06,099 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 22:30:06,794 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 22:30:07,362 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 22:30:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:07,572 INFO L93 Difference]: Finished difference Result 328 states and 448 transitions. [2020-07-20 22:30:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-07-20 22:30:07,573 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 308 [2020-07-20 22:30:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:07,577 INFO L225 Difference]: With dead ends: 328 [2020-07-20 22:30:07,578 INFO L226 Difference]: Without dead ends: 326 [2020-07-20 22:30:07,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 543 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4535 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=2886, Invalid=15204, Unknown=0, NotChecked=0, Total=18090 [2020-07-20 22:30:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-07-20 22:30:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 280. [2020-07-20 22:30:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-20 22:30:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 371 transitions. [2020-07-20 22:30:07,616 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 371 transitions. Word has length 308 [2020-07-20 22:30:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:07,617 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 371 transitions. [2020-07-20 22:30:07,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-07-20 22:30:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 371 transitions. [2020-07-20 22:30:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-20 22:30:07,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:07,625 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 63, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:07,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:07,839 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:07,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1039722502, now seen corresponding path program 4 times [2020-07-20 22:30:07,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:07,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703918243] [2020-07-20 22:30:07,840 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 22:30:07,962 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:07,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:07,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 22:30:07,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:09,158 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:30:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8913 backedges. 126 proven. 975 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2020-07-20 22:30:09,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:09,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:09,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:09,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:09,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:09,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:09,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:09,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:09,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:09,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:30:09,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:09,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:09,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:09,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:09,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:30:09,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:09,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:09,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:09,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:09,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:09,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:09,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:30:10,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:30:10,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:30:10,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:30:10,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:30:10,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:30:10,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:10,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:10,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:30:11,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:30:11,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 22:30:11,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:11,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:11,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:30:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8913 backedges. 126 proven. 975 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2020-07-20 22:30:12,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703918243] [2020-07-20 22:30:12,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:12,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 69 [2020-07-20 22:30:12,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503222262] [2020-07-20 22:30:12,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-20 22:30:12,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:12,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-20 22:30:12,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1628, Invalid=3064, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 22:30:12,355 INFO L87 Difference]: Start difference. First operand 280 states and 371 transitions. Second operand 69 states. [2020-07-20 22:30:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:17,671 INFO L93 Difference]: Finished difference Result 447 states and 643 transitions. [2020-07-20 22:30:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-20 22:30:17,672 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 406 [2020-07-20 22:30:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:17,677 INFO L225 Difference]: With dead ends: 447 [2020-07-20 22:30:17,677 INFO L226 Difference]: Without dead ends: 387 [2020-07-20 22:30:17,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 741 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3587, Invalid=7755, Unknown=0, NotChecked=0, Total=11342 [2020-07-20 22:30:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-07-20 22:30:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 379. [2020-07-20 22:30:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-07-20 22:30:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 501 transitions. [2020-07-20 22:30:17,719 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 501 transitions. Word has length 406 [2020-07-20 22:30:17,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:17,720 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 501 transitions. [2020-07-20 22:30:17,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-20 22:30:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 501 transitions. [2020-07-20 22:30:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-07-20 22:30:17,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:17,734 INFO L422 BasicCegarLoop]: trace histogram [88, 87, 87, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:17,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:17,948 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:17,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1920379625, now seen corresponding path program 5 times [2020-07-20 22:30:17,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:17,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558369158] [2020-07-20 22:30:17,949 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 22:30:18,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:18,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:18,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 90 conjunts are in the unsatisfiable core [2020-07-20 22:30:18,121 INFO L286 TraceCheckSpWp]: Computing forward predicates...