/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:27:02,668 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 21:27:02,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:27:02,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:27:02,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:27:02,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:27:02,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:27:02,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:27:02,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:27:02,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:27:02,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:27:02,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:27:02,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:27:02,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:27:02,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:27:02,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:27:02,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:27:02,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:27:02,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:27:02,754 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:27:02,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:27:02,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:27:02,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:27:02,756 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:27:02,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:27:02,756 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:27:02,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:27:02,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:27:02,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:27:02,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:27:02,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:27:02,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:27:02,758 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:27:02,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:27:02,758 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:27:02,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:27:02,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:27:02,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:27:02,759 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:27:02,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:27:02,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:27:02,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:27:02,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:27:02,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:27:02,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:27:02,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:02,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:27:02,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:27:02,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:27:03,057 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:27:03,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:27:03,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:27:03,076 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:27:03,077 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:27:03,078 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c [2020-07-20 21:27:03,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543372237/2902bdbfa9804a6baa11eb50634c0d05/FLAG401b397e1 [2020-07-20 21:27:03,634 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:27:03,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c [2020-07-20 21:27:03,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543372237/2902bdbfa9804a6baa11eb50634c0d05/FLAG401b397e1 [2020-07-20 21:27:03,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543372237/2902bdbfa9804a6baa11eb50634c0d05 [2020-07-20 21:27:03,999 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:27:04,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:27:04,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:27:04,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:27:04,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:27:04,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:27:03" (1/1) ... [2020-07-20 21:27:04,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500d7c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:27:04, skipping insertion in model container [2020-07-20 21:27:04,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:27:03" (1/1) ... [2020-07-20 21:27:04,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:27:04,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:27:04,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:27:04,217 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:27:04,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:27:04,251 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:27:04,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:27:04 WrapperNode [2020-07-20 21:27:04,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:27:04,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:27:04,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:27:04,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:27:04,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:27:04" (1/1) ... [2020-07-20 21:27:04,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:27:04" (1/1) ... [2020-07-20 21:27:04,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:27:04" (1/1) ... [2020-07-20 21:27:04,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:27:04" (1/1) ... [2020-07-20 21:27:04,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:27:04" (1/1) ... [2020-07-20 21:27:04,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:27:04" (1/1) ... [2020-07-20 21:27:04,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:27:04" (1/1) ... [2020-07-20 21:27:04,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:27:04,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:27:04,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:27:04,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:27:04,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:27:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:27:04,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:27:04,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:27:04,431 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 21:27:04,432 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 21:27:04,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:27:04,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:27:04,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:27:04,432 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 21:27:04,432 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 21:27:04,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:27:04,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:27:04,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:27:04,644 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:27:04,645 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:27:04,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:27:04 BoogieIcfgContainer [2020-07-20 21:27:04,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:27:04,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:27:04,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:27:04,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:27:04,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:27:03" (1/3) ... [2020-07-20 21:27:04,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491f23bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:27:04, skipping insertion in model container [2020-07-20 21:27:04,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:27:04" (2/3) ... [2020-07-20 21:27:04,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491f23bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:27:04, skipping insertion in model container [2020-07-20 21:27:04,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:27:04" (3/3) ... [2020-07-20 21:27:04,665 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-2.c [2020-07-20 21:27:04,680 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:27:04,690 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:27:04,711 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:27:04,749 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:27:04,750 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:27:04,750 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:27:04,750 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:27:04,750 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:27:04,750 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:27:04,751 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:27:04,751 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:27:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 21:27:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:27:04,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:04,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:04,791 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:04,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:04,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 21:27:04,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:04,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823048069] [2020-07-20 21:27:04,814 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 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:04,885 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:27:04,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:04,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:27:04,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:27:04,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:27:04,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823048069] [2020-07-20 21:27:05,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:27:05,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:27:05,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693659736] [2020-07-20 21:27:05,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:27:05,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:05,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:27:05,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:27:05,026 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 21:27:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:05,144 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 21:27:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:27:05,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 21:27:05,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:05,160 INFO L225 Difference]: With dead ends: 44 [2020-07-20 21:27:05,160 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 21:27:05,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:27:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 21:27:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 21:27:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:27:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 21:27:05,217 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 21:27:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:05,218 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 21:27:05,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:27:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 21:27:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:27:05,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:05,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:05,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:05,436 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:05,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 21:27:05,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:05,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026884319] [2020-07-20 21:27:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:05,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:27:05,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:27:05,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:27:05,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:27:05,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026884319] [2020-07-20 21:27:05,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:27:05,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:27:05,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396351013] [2020-07-20 21:27:05,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:27:05,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:27:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:27:05,533 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 21:27:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:05,601 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 21:27:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:27:05,602 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 21:27:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:05,604 INFO L225 Difference]: With dead ends: 36 [2020-07-20 21:27:05,604 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 21:27:05,606 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 21:27:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 21:27:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 21:27:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:27:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 21:27:05,619 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 21:27:05,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:05,620 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 21:27:05,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:27:05,623 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 21:27:05,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:27:05,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:05,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:05,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:05,830 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:05,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:05,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 21:27:05,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:05,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639539779] [2020-07-20 21:27:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:05,867 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:27:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:05,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:27:05,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:27:05,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:06,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:06,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:27:06,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639539779] [2020-07-20 21:27:06,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:06,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 21:27:06,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325884723] [2020-07-20 21:27:06,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:27:06,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:06,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:27:06,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:27:06,154 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 21:27:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:06,300 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 21:27:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:27:06,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 21:27:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:06,303 INFO L225 Difference]: With dead ends: 41 [2020-07-20 21:27:06,303 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 21:27:06,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:27:06,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 21:27:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 21:27:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 21:27:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 21:27:06,314 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 21:27:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:06,315 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 21:27:06,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:27:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 21:27:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:27:06,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:06,317 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:06,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:06,532 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:06,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:06,533 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 21:27:06,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:06,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694194762] [2020-07-20 21:27:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:06,572 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:06,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:06,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:27:06,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:27:06,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:06,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:06,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:27:06,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694194762] [2020-07-20 21:27:06,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:06,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 21:27:06,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115967268] [2020-07-20 21:27:06,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:27:06,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:06,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:27:06,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:27:06,805 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 21:27:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:06,940 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 21:27:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:27:06,941 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 21:27:06,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:06,943 INFO L225 Difference]: With dead ends: 46 [2020-07-20 21:27:06,943 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 21:27:06,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:27:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 21:27:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 21:27:06,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 21:27:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 21:27:06,954 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 21:27:06,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:06,955 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 21:27:06,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:27:06,955 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 21:27:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 21:27:06,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:06,957 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2020-07-20 21:27:07,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:07,172 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 21:27:07,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:07,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601969313] [2020-07-20 21:27:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:07,213 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:07,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:07,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:27:07,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 21:27:07,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:07,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:07,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:07,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:27:07,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601969313] [2020-07-20 21:27:07,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:07,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 21:27:07,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601291951] [2020-07-20 21:27:07,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 21:27:07,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:07,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 21:27:07,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:27:07,674 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 21:27:07,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:07,842 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 21:27:07,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:27:07,842 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 21:27:07,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:07,844 INFO L225 Difference]: With dead ends: 51 [2020-07-20 21:27:07,845 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 21:27:07,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:27:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 21:27:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 21:27:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 21:27:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 21:27:07,856 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 21:27:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:07,857 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 21:27:07,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 21:27:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 21:27:07,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 21:27:07,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:07,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2020-07-20 21:27:08,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:08,074 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:08,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:08,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 21:27:08,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:08,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337762684] [2020-07-20 21:27:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:08,112 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:08,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:27:08,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:27:08,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:08,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:08,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:08,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:27:08,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337762684] [2020-07-20 21:27:08,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:08,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 21:27:08,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131859830] [2020-07-20 21:27:08,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 21:27:08,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:08,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 21:27:08,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:27:08,535 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 21:27:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:08,722 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 21:27:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:27:08,724 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 21:27:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:08,729 INFO L225 Difference]: With dead ends: 56 [2020-07-20 21:27:08,730 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 21:27:08,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:27:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 21:27:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 21:27:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 21:27:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 21:27:08,744 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 21:27:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:08,744 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 21:27:08,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 21:27:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 21:27:08,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 21:27:08,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:08,747 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:08,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:08,962 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:08,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:08,963 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 21:27:08,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:08,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774242177] [2020-07-20 21:27:08,964 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 21:27:09,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:09,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:09,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:27:09,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 21:27:09,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:09,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:09,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:09,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:09,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 21:27:09,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774242177] [2020-07-20 21:27:09,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:09,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 21:27:09,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947116033] [2020-07-20 21:27:09,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:27:09,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:27:09,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:27:09,641 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 21:27:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:09,840 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 21:27:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:27:09,841 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 21:27:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:09,843 INFO L225 Difference]: With dead ends: 61 [2020-07-20 21:27:09,846 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 21:27:09,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:27:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 21:27:09,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 21:27:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 21:27:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 21:27:09,872 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 21:27:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:09,873 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 21:27:09,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:27:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 21:27:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 21:27:09,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:09,883 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:10,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:10,099 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:10,100 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 21:27:10,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:10,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837381469] [2020-07-20 21:27:10,101 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 21:27:10,139 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:10,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:10,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:27:10,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 21:27:10,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:10,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:10,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:10,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:10,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:10,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 21:27:10,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837381469] [2020-07-20 21:27:10,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:10,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 21:27:10,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877269766] [2020-07-20 21:27:10,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:27:10,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:10,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:27:10,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:27:10,741 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-20 21:27:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:10,926 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 21:27:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:27:10,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 21:27:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:10,929 INFO L225 Difference]: With dead ends: 66 [2020-07-20 21:27:10,929 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 21:27:10,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:27:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 21:27:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 21:27:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 21:27:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 21:27:10,941 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 21:27:10,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:10,942 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 21:27:10,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:27:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 21:27:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 21:27:10,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:10,944 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:11,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:11,159 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:11,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:11,159 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 21:27:11,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:11,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015708368] [2020-07-20 21:27:11,160 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 21:27:11,209 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:11,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:11,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:27:11,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 21:27:11,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:11,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:11,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:12,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:12,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:12,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:12,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:12,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 21:27:12,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015708368] [2020-07-20 21:27:12,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:12,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 21:27:12,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587493030] [2020-07-20 21:27:12,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:27:12,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:12,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:27:12,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:27:12,237 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-20 21:27:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:12,509 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 21:27:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:27:12,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-20 21:27:12,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:12,513 INFO L225 Difference]: With dead ends: 71 [2020-07-20 21:27:12,514 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 21:27:12,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:27:12,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 21:27:12,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 21:27:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 21:27:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 21:27:12,527 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 21:27:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:12,527 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 21:27:12,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:27:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 21:27:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 21:27:12,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:12,533 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:12,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:12,734 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:12,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:12,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 21:27:12,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:12,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61337350] [2020-07-20 21:27:12,737 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 21:27:12,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:12,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:12,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:27:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 21:27:12,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:13,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:13,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:13,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:13,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 21:27:13,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61337350] [2020-07-20 21:27:13,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:13,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 21:27:13,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973018873] [2020-07-20 21:27:13,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:27:13,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:13,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:27:13,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:27:13,811 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-20 21:27:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:14,076 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-20 21:27:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:27:14,076 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-20 21:27:14,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:14,078 INFO L225 Difference]: With dead ends: 76 [2020-07-20 21:27:14,079 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 21:27:14,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:27:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 21:27:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 21:27:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 21:27:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 21:27:14,108 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-20 21:27:14,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:14,109 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 21:27:14,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:27:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 21:27:14,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 21:27:14,116 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:14,116 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:14,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:14,325 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-20 21:27:14,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:14,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930047530] [2020-07-20 21:27:14,327 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 21:27:14,435 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:14,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:14,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:27:14,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-20 21:27:14,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:15,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:15,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:15,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:16,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:16,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:16,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:16,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:16,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-20 21:27:16,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930047530] [2020-07-20 21:27:16,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:16,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 21:27:16,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256535499] [2020-07-20 21:27:16,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:27:16,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:27:16,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:27:16,204 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-20 21:27:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:16,494 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-20 21:27:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:27:16,495 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-20 21:27:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:16,498 INFO L225 Difference]: With dead ends: 81 [2020-07-20 21:27:16,498 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 21:27:16,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:27:16,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 21:27:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-20 21:27:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 21:27:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 21:27:16,511 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-20 21:27:16,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:16,512 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 21:27:16,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:27:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 21:27:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 21:27:16,514 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:16,514 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:16,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:16,728 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-20 21:27:16,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:16,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892861235] [2020-07-20 21:27:16,730 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 21:27:16,810 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:16,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:16,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:27:16,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-20 21:27:16,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:17,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:18,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:18,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:18,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:18,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:18,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:18,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-20 21:27:18,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892861235] [2020-07-20 21:27:18,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:18,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 21:27:18,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682174268] [2020-07-20 21:27:18,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:27:18,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:18,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:27:18,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:27:18,344 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-20 21:27:18,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:18,628 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-20 21:27:18,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:27:18,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-20 21:27:18,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:18,632 INFO L225 Difference]: With dead ends: 86 [2020-07-20 21:27:18,632 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 21:27:18,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:27:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 21:27:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-20 21:27:18,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 21:27:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 21:27:18,643 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-20 21:27:18,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:18,644 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 21:27:18,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:27:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 21:27:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-20 21:27:18,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:18,646 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:18,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:18,860 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:18,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:18,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-20 21:27:18,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:18,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622633380] [2020-07-20 21:27:18,862 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 21:27:18,981 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:18,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:18,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:27:18,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-20 21:27:19,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:20,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:20,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:20,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:21,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:21,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:21,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:21,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:21,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:21,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:21,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:21,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-20 21:27:21,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622633380] [2020-07-20 21:27:21,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:21,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 21:27:21,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372319555] [2020-07-20 21:27:21,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:27:21,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:21,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:27:21,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:27:21,480 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-20 21:27:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:21,879 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-20 21:27:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:27:21,880 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-20 21:27:21,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:21,883 INFO L225 Difference]: With dead ends: 91 [2020-07-20 21:27:21,883 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 21:27:21,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:27:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 21:27:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-20 21:27:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 21:27:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 21:27:21,900 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-20 21:27:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:21,901 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 21:27:21,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:27:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 21:27:21,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 21:27:21,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:21,905 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:22,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:22,118 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:22,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:22,119 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-20 21:27:22,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:22,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447217587] [2020-07-20 21:27:22,120 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 21:27:22,255 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:22,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:22,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:27:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-20 21:27:22,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:23,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:24,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:24,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:24,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:24,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:24,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:24,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:24,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-20 21:27:24,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447217587] [2020-07-20 21:27:24,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:24,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 21:27:24,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051099846] [2020-07-20 21:27:24,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:27:24,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:24,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:27:24,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:27:24,782 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-20 21:27:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:25,154 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-20 21:27:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:27:25,155 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-20 21:27:25,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:25,158 INFO L225 Difference]: With dead ends: 96 [2020-07-20 21:27:25,158 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 21:27:25,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:27:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 21:27:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-20 21:27:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 21:27:25,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 21:27:25,170 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-20 21:27:25,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:25,171 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 21:27:25,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:27:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 21:27:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 21:27:25,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:25,179 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:25,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:25,392 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:25,392 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-20 21:27:25,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:25,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804631668] [2020-07-20 21:27:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:25,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:25,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:25,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:27:25,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-20 21:27:25,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:27,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:27,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:28,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:28,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:28,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:28,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:29,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:29,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:29,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:29,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:29,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-20 21:27:29,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804631668] [2020-07-20 21:27:29,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:29,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-20 21:27:29,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997994145] [2020-07-20 21:27:29,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:27:29,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:29,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:27:29,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:27:29,594 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-20 21:27:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:30,061 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-20 21:27:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:27:30,062 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-20 21:27:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:30,067 INFO L225 Difference]: With dead ends: 101 [2020-07-20 21:27:30,067 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 21:27:30,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:27:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 21:27:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-20 21:27:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 21:27:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 21:27:30,095 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-20 21:27:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:30,096 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 21:27:30,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:27:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 21:27:30,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 21:27:30,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:30,104 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:30,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:30,312 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:30,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:30,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-20 21:27:30,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:30,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292969248] [2020-07-20 21:27:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:30,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:30,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:30,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:27:30,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-20 21:27:30,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:32,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:32,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:33,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:33,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:34,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:34,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:34,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:34,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:34,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-20 21:27:34,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292969248] [2020-07-20 21:27:34,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:34,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-20 21:27:34,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961993536] [2020-07-20 21:27:34,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:27:34,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:34,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:27:34,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:27:34,590 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-20 21:27:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:35,070 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-20 21:27:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:27:35,071 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-20 21:27:35,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:35,074 INFO L225 Difference]: With dead ends: 106 [2020-07-20 21:27:35,074 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 21:27:35,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:27:35,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 21:27:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-20 21:27:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 21:27:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 21:27:35,086 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-20 21:27:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:35,087 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 21:27:35,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:27:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 21:27:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-20 21:27:35,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:35,095 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:35,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:35,311 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:35,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-20 21:27:35,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:35,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471156222] [2020-07-20 21:27:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:35,689 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:35,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:27:35,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-20 21:27:36,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:40,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:41,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:41,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:41,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:42,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:42,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:42,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:42,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:42,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:43,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:43,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:43,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-20 21:27:43,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471156222] [2020-07-20 21:27:43,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:43,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-20 21:27:43,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009896397] [2020-07-20 21:27:43,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:27:43,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:43,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:27:43,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:27:43,464 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-20 21:27:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:44,046 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-20 21:27:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:27:44,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-20 21:27:44,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:44,052 INFO L225 Difference]: With dead ends: 111 [2020-07-20 21:27:44,052 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 21:27:44,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:27:44,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 21:27:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-20 21:27:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 21:27:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-20 21:27:44,065 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-20 21:27:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:44,066 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-20 21:27:44,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:27:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-20 21:27:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-20 21:27:44,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:44,070 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:44,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:44,284 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:44,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-20 21:27:44,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:44,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155576943] [2020-07-20 21:27:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:44,569 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:44,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:44,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:27:44,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-20 21:27:44,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:47,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:48,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:48,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:49,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:49,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:49,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:50,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:50,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:50,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:50,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:50,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-20 21:27:50,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155576943] [2020-07-20 21:27:50,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:50,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-20 21:27:50,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907391541] [2020-07-20 21:27:50,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:27:50,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:50,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:27:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:27:50,346 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 24 states. [2020-07-20 21:27:50,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:50,957 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-20 21:27:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:27:50,958 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 418 [2020-07-20 21:27:50,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:50,962 INFO L225 Difference]: With dead ends: 116 [2020-07-20 21:27:50,962 INFO L226 Difference]: Without dead ends: 112 [2020-07-20 21:27:50,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:27:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-20 21:27:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-20 21:27:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 21:27:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-20 21:27:50,977 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-20 21:27:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:50,978 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-20 21:27:50,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:27:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-20 21:27:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2020-07-20 21:27:50,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:50,985 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 46, 45, 45, 34, 34, 34, 34, 34, 34, 34, 34, 22, 22, 22, 22, 22, 22, 22, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:51,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:51,199 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1563866591, now seen corresponding path program 8 times [2020-07-20 21:27:51,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:51,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493016506] [2020-07-20 21:27:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:51,827 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:51,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:51,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:27:51,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2323 refuted. 0 times theorem prover too weak. 14314 trivial. 0 not checked. [2020-07-20 21:27:52,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:56,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:56,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:57,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:57,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:59,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:59,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:59,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:00,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:00,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:00,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:00,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:00,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:00,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:01,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:01,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2375 refuted. 0 times theorem prover too weak. 14262 trivial. 0 not checked. [2020-07-20 21:28:01,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493016506] [2020-07-20 21:28:01,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:28:01,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-20 21:28:01,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438480325] [2020-07-20 21:28:01,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 21:28:01,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:28:01,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 21:28:01,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:28:01,332 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 26 states. [2020-07-20 21:28:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:28:01,982 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-20 21:28:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 21:28:01,983 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 741 [2020-07-20 21:28:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:28:01,988 INFO L225 Difference]: With dead ends: 121 [2020-07-20 21:28:01,988 INFO L226 Difference]: Without dead ends: 117 [2020-07-20 21:28:01,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1439 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 21:28:01,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-20 21:28:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-20 21:28:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 21:28:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-20 21:28:02,002 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 741 [2020-07-20 21:28:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:28:02,003 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-20 21:28:02,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 21:28:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-20 21:28:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-20 21:28:02,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:28:02,012 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 55, 55, 53, 37, 37, 37, 37, 37, 37, 37, 37, 27, 27, 27, 27, 27, 27, 27, 26, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:28:02,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:28:02,226 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:28:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:28:02,226 INFO L82 PathProgramCache]: Analyzing trace with hash 2100501163, now seen corresponding path program 4 times [2020-07-20 21:28:02,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:28:02,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839108735] [2020-07-20 21:28:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:28:02,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:28:02,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:28:02,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:28:02,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:28:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2821 refuted. 0 times theorem prover too weak. 19575 trivial. 0 not checked. [2020-07-20 21:28:03,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:28:07,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:07,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:09,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:10,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:10,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:11,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:12,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:12,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:12,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:12,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:12,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:12,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2877 refuted. 0 times theorem prover too weak. 19519 trivial. 0 not checked. [2020-07-20 21:28:13,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839108735] [2020-07-20 21:28:13,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:28:13,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-20 21:28:13,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26523439] [2020-07-20 21:28:13,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 21:28:13,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:28:13,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 21:28:13,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:28:13,259 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 26 states. [2020-07-20 21:28:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:28:13,973 INFO L93 Difference]: Finished difference Result 126 states and 350 transitions. [2020-07-20 21:28:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 21:28:13,975 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 871 [2020-07-20 21:28:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:28:13,980 INFO L225 Difference]: With dead ends: 126 [2020-07-20 21:28:13,980 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 21:28:13,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1698 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 21:28:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 21:28:13,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-20 21:28:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 21:28:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-20 21:28:13,996 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 871 [2020-07-20 21:28:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:28:13,997 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-20 21:28:13,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 21:28:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-20 21:28:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-07-20 21:28:14,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:28:14,025 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 110, 110, 94, 74, 74, 74, 74, 74, 74, 74, 74, 55, 55, 55, 55, 55, 55, 55, 55, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:28:14,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:28:14,239 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:28:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:28:14,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1326645612, now seen corresponding path program 9 times [2020-07-20 21:28:14,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:28:14,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493353459] [2020-07-20 21:28:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:28:15,066 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:28:15,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:28:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 21:28:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:28:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6392 refuted. 0 times theorem prover too weak. 81780 trivial. 0 not checked. [2020-07-20 21:28:16,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:28:25,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:25,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:28,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:30,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:31,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:32,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:32,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:32,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:33,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:33,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:33,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:33,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:33,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:33,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6457 refuted. 0 times theorem prover too weak. 81715 trivial. 0 not checked. [2020-07-20 21:28:34,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493353459] [2020-07-20 21:28:34,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:28:34,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-20 21:28:34,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411403321] [2020-07-20 21:28:34,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 21:28:34,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:28:34,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 21:28:34,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:28:34,643 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 28 states. [2020-07-20 21:28:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:28:35,450 INFO L93 Difference]: Finished difference Result 131 states and 376 transitions. [2020-07-20 21:28:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 21:28:35,452 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1690 [2020-07-20 21:28:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:28:35,457 INFO L225 Difference]: With dead ends: 131 [2020-07-20 21:28:35,457 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 21:28:35,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3392 GetRequests, 3333 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 21:28:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 21:28:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2020-07-20 21:28:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 21:28:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-20 21:28:35,472 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1690 [2020-07-20 21:28:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:28:35,473 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-20 21:28:35,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 21:28:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-20 21:28:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1433 [2020-07-20 21:28:35,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:28:35,496 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 92, 92, 87, 60, 60, 60, 60, 60, 60, 60, 60, 46, 46, 46, 46, 46, 46, 46, 41, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:28:35,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:28:35,713 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:28:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:28:35,714 INFO L82 PathProgramCache]: Analyzing trace with hash -37703149, now seen corresponding path program 5 times [2020-07-20 21:28:35,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:28:35,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898087937] [2020-07-20 21:28:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:28:36,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:28:36,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:28:36,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 2684 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 21:28:36,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:28:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5319 refuted. 0 times theorem prover too weak. 56349 trivial. 0 not checked. [2020-07-20 21:28:37,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:28:44,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:44,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:47,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:47,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:49,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:49,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:50,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:51,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:52,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:52,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:52,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:52,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:52,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:53,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5389 refuted. 0 times theorem prover too weak. 56279 trivial. 0 not checked. [2020-07-20 21:28:53,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898087937] [2020-07-20 21:28:53,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:28:53,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-20 21:28:53,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940586244] [2020-07-20 21:28:53,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 21:28:53,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:28:53,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 21:28:53,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:28:53,899 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 28 states. [2020-07-20 21:28:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:28:54,636 INFO L93 Difference]: Finished difference Result 136 states and 404 transitions. [2020-07-20 21:28:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 21:28:54,641 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1432 [2020-07-20 21:28:54,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:28:54,645 INFO L225 Difference]: With dead ends: 136 [2020-07-20 21:28:54,645 INFO L226 Difference]: Without dead ends: 132 [2020-07-20 21:28:54,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2875 GetRequests, 2816 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 21:28:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-20 21:28:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-07-20 21:28:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 21:28:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-20 21:28:54,661 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1432 [2020-07-20 21:28:54,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:28:54,662 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-20 21:28:54,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 21:28:54,662 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-20 21:28:54,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1990 [2020-07-20 21:28:54,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:28:54,696 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 112, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 64, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:28:54,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:28:54,910 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:28:54,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:28:54,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1412849447, now seen corresponding path program 10 times [2020-07-20 21:28:54,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:28:54,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254003740] [2020-07-20 21:28:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:28:55,932 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:28:55,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:28:55,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 3754 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 21:28:55,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:28:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8137 refuted. 0 times theorem prover too weak. 114500 trivial. 0 not checked. [2020-07-20 21:28:58,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:29:06,628 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:29:08,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:08,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:12,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:14,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:14,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:17,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:18,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:19,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:19,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:20,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:20,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:20,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:20,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:20,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:20,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:21,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8217 refuted. 0 times theorem prover too weak. 114420 trivial. 0 not checked. [2020-07-20 21:29:22,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254003740] [2020-07-20 21:29:22,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:29:22,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-20 21:29:22,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523439455] [2020-07-20 21:29:22,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 21:29:22,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:29:22,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 21:29:22,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:29:22,582 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 30 states. [2020-07-20 21:29:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:29:23,738 INFO L93 Difference]: Finished difference Result 141 states and 432 transitions. [2020-07-20 21:29:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 21:29:23,740 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1989 [2020-07-20 21:29:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:29:23,745 INFO L225 Difference]: With dead ends: 141 [2020-07-20 21:29:23,745 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 21:29:23,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3991 GetRequests, 3927 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 21:29:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 21:29:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-20 21:29:23,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 21:29:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-20 21:29:23,761 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 1989 [2020-07-20 21:29:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:29:23,763 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-20 21:29:23,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 21:29:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-20 21:29:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2050 [2020-07-20 21:29:23,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:29:23,798 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 124, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 60, 52, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:29:24,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:29:24,012 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:29:24,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:29:24,014 INFO L82 PathProgramCache]: Analyzing trace with hash 266934567, now seen corresponding path program 5 times [2020-07-20 21:29:24,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:29:24,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301086380] [2020-07-20 21:29:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:29:25,090 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:29:25,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:29:25,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 3844 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 21:29:25,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:29:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8506 refuted. 0 times theorem prover too weak. 119697 trivial. 0 not checked. [2020-07-20 21:29:26,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:29:39,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:39,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:45,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:51,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:51,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:54,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:56,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:56,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:57,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:58,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:58,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:58,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:58,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:59,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:59,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8591 refuted. 0 times theorem prover too weak. 119612 trivial. 0 not checked. [2020-07-20 21:30:00,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301086380] [2020-07-20 21:30:00,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:00,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-20 21:30:00,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597558468] [2020-07-20 21:30:00,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 21:30:00,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:00,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 21:30:00,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:30:00,733 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 30 states. [2020-07-20 21:30:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:02,246 INFO L93 Difference]: Finished difference Result 146 states and 462 transitions. [2020-07-20 21:30:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 21:30:02,249 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 2049 [2020-07-20 21:30:02,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:02,254 INFO L225 Difference]: With dead ends: 146 [2020-07-20 21:30:02,255 INFO L226 Difference]: Without dead ends: 142 [2020-07-20 21:30:02,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4046 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 21:30:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-20 21:30:02,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-07-20 21:30:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 21:30:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-20 21:30:02,273 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 2049 [2020-07-20 21:30:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:02,275 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-20 21:30:02,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 21:30:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-20 21:30:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3680 [2020-07-20 21:30:02,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:02,357 INFO L422 BasicCegarLoop]: trace histogram [329, 329, 236, 236, 211, 164, 164, 164, 164, 164, 164, 164, 164, 118, 118, 118, 118, 118, 118, 118, 118, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:02,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:02,557 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:02,559 INFO L82 PathProgramCache]: Analyzing trace with hash -886096047, now seen corresponding path program 11 times [2020-07-20 21:30:02,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:02,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519757737] [2020-07-20 21:30:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:04,125 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:04,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:04,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 6936 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 21:30:04,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16770 refuted. 0 times theorem prover too weak. 408925 trivial. 0 not checked. [2020-07-20 21:30:08,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:10,780 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:30:13,782 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:30:13,887 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:30:13,997 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:30:15,615 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:30:15,724 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:30:15,846 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:30:15,963 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:30:16,078 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 21:30:16,185 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 21:30:32,701 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:30:32,816 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:30:32,928 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:30:34,055 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:30:34,176 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:30:34,300 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:30:34,423 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:30:34,537 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:30:34,656 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 21:30:34,769 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:30:34,875 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:30:34,987 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:30:35,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:45,747 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:30:45,853 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:30:47,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:54,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:54,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:02,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:07,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:07,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:09,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:11,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:11,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:12,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:12,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:13,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:13,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:13,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16866 refuted. 0 times theorem prover too weak. 408829 trivial. 0 not checked. [2020-07-20 21:31:18,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519757737] [2020-07-20 21:31:18,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:31:18,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-20 21:31:18,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679174888] [2020-07-20 21:31:18,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 21:31:18,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:31:18,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 21:31:18,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-20 21:31:18,106 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 32 states. [2020-07-20 21:31:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:31:20,115 INFO L93 Difference]: Finished difference Result 151 states and 492 transitions. [2020-07-20 21:31:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 21:31:20,118 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3679 [2020-07-20 21:31:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:31:20,126 INFO L225 Difference]: With dead ends: 151 [2020-07-20 21:31:20,126 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 21:31:20,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7372 GetRequests, 7303 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 21:31:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 21:31:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2020-07-20 21:31:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 21:31:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-20 21:31:20,148 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3679 [2020-07-20 21:31:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:31:20,152 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-20 21:31:20,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 21:31:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-20 21:31:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3365 [2020-07-20 21:31:20,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:31:20,262 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 214, 214, 208, 143, 143, 143, 143, 143, 143, 143, 143, 107, 107, 107, 107, 107, 107, 107, 101, 79, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:31:20,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:31:20,478 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:31:20,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:31:20,479 INFO L82 PathProgramCache]: Analyzing trace with hash 147049693, now seen corresponding path program 6 times [2020-07-20 21:31:20,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:31:20,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944107870] [2020-07-20 21:31:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:31:21,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:31:21,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:31:22,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 6302 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 21:31:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:31:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15526 refuted. 0 times theorem prover too weak. 332578 trivial. 0 not checked. [2020-07-20 21:31:25,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:31:30,467 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:31:30,577 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:31:31,612 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:31:31,730 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:31:31,845 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:31:31,958 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:31:32,980 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:31:33,087 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:31:33,196 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:31:33,303 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:31:33,411 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 21:31:33,961 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:31:46,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:46,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:55,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:06,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:06,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:10,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:10,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:16,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:17,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:18,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:19,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:20,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:20,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:20,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:20,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15628 refuted. 0 times theorem prover too weak. 332476 trivial. 0 not checked. [2020-07-20 21:32:26,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944107870] [2020-07-20 21:32:26,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:32:26,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-20 21:32:26,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059183122] [2020-07-20 21:32:26,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 21:32:26,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:32:26,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 21:32:26,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-20 21:32:26,127 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 32 states. [2020-07-20 21:32:28,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:32:28,141 INFO L93 Difference]: Finished difference Result 156 states and 524 transitions. [2020-07-20 21:32:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 21:32:28,145 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3364 [2020-07-20 21:32:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:32:28,152 INFO L225 Difference]: With dead ends: 156 [2020-07-20 21:32:28,153 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 21:32:28,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6741 GetRequests, 6672 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 21:32:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 21:32:28,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-20 21:32:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 21:32:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-20 21:32:28,175 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3364 [2020-07-20 21:32:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:32:28,178 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-20 21:32:28,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 21:32:28,178 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-20 21:32:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4616 [2020-07-20 21:32:28,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:32:28,364 INFO L422 BasicCegarLoop]: trace histogram [436, 436, 300, 273, 273, 218, 218, 218, 218, 218, 218, 218, 218, 136, 136, 136, 136, 136, 136, 136, 136, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:32:28,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:32:28,566 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:32:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:32:28,568 INFO L82 PathProgramCache]: Analyzing trace with hash -554675479, now seen corresponding path program 12 times [2020-07-20 21:32:28,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:32:28,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391908691] [2020-07-20 21:32:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:32:30,872 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:32:30,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:32:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 8700 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 21:32:30,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:32:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 22920 refuted. 0 times theorem prover too weak. 665925 trivial. 0 not checked. [2020-07-20 21:32:41,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:32:45,115 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:32:45,229 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:32:45,335 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:32:46,116 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:32:46,233 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:32:46,351 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:32:46,472 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:32:48,551 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:32:48,677 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:32:48,811 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:32:48,946 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:32:50,402 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:32:50,548 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:32:50,700 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:32:50,852 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:32:52,908 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:32:53,037 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:32:53,170 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:32:53,303 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:32:53,437 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-20 21:32:53,558 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-20 21:32:53,672 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 21:32:53,786 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 21:32:53,894 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:32:54,000 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 21:33:11,144 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:33:11,450 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:33:12,441 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:33:12,563 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:33:12,690 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:33:12,815 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:33:15,445 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:33:15,580 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:33:15,723 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:33:15,862 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:33:17,623 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:33:17,770 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:33:17,931 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:33:18,082 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:33:18,228 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 21:33:18,369 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 21:33:18,507 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 21:33:18,638 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 21:33:18,760 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:33:18,880 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:33:18,990 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:33:19,094 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 21:33:19,716 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:33:19,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:34,499 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:33:34,608 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:33:35,235 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:33:35,346 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:33:35,467 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:33:35,591 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:33:36,632 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:33:36,756 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:33:36,889 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:33:37,024 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:33:39,869 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:33:40,007 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:33:40,153 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:33:40,296 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:33:40,438 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:33:40,570 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 21:33:40,695 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:33:40,813 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:33:40,930 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 21:33:41,039 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:33:41,143 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:33:41,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:04,963 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:34:05,067 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:34:05,174 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:34:05,282 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:34:05,931 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:34:06,041 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:34:06,165 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:34:06,287 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:34:07,355 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:34:07,482 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:34:07,617 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:34:07,749 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:34:07,871 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:34:07,995 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:34:08,112 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:34:08,220 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:34:08,324 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:34:09,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:15,639 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 21:34:17,570 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:34:17,675 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:34:17,783 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:34:17,891 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:34:18,551 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:34:18,671 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:34:18,794 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:34:18,914 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:34:19,031 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:34:19,140 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:34:19,246 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 21:34:19,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:25,732 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:34:25,836 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:34:25,946 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:34:26,052 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:34:26,157 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:34:26,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:31,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:31,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:35,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:38,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:39,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:40,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:41,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:41,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:41,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:41,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 23034 refuted. 0 times theorem prover too weak. 665811 trivial. 0 not checked. [2020-07-20 21:34:48,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391908691] [2020-07-20 21:34:48,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:34:48,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-20 21:34:48,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525240191] [2020-07-20 21:34:48,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 21:34:48,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:34:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 21:34:48,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 21:34:48,478 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 34 states. [2020-07-20 21:34:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:34:51,555 INFO L93 Difference]: Finished difference Result 161 states and 556 transitions. [2020-07-20 21:34:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 21:34:51,561 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 4615 [2020-07-20 21:34:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:34:51,567 INFO L225 Difference]: With dead ends: 161 [2020-07-20 21:34:51,567 INFO L226 Difference]: Without dead ends: 157 [2020-07-20 21:34:51,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9245 GetRequests, 9171 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 21:34:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-20 21:34:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-07-20 21:34:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 21:34:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-20 21:34:51,592 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 4615 [2020-07-20 21:34:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:34:51,595 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-20 21:34:51,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 21:34:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-20 21:34:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9330 [2020-07-20 21:34:52,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:34:52,389 INFO L422 BasicCegarLoop]: trace histogram [846, 846, 625, 533, 533, 423, 423, 423, 423, 423, 423, 423, 423, 359, 266, 266, 266, 266, 266, 266, 266, 221, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:34:52,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:34:52,596 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:34:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:34:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1670319822, now seen corresponding path program 6 times [2020-07-20 21:34:52,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:34:52,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985837056] [2020-07-20 21:34:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:34:56,081 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:34:56,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:34:56,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 17449 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 21:34:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:35:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49554 refuted. 0 times theorem prover too weak. 2725114 trivial. 0 not checked. [2020-07-20 21:35:23,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:35:26,069 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:35:26,176 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:35:26,847 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:35:26,965 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:35:27,711 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:35:27,836 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:35:27,967 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:35:28,089 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:35:29,329 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:35:29,467 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:35:29,616 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:35:29,766 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:35:32,667 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:35:32,823 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:35:32,993 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:35:33,157 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:35:39,694 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:35:39,866 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:35:40,044 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:35:40,217 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:35:50,529 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:35:50,685 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:35:50,863 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:35:51,034 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:35:51,203 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-20 21:35:51,360 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-20 21:35:51,511 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 21:35:51,662 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 21:35:51,816 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 21:35:51,948 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 21:35:52,079 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:35:52,204 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 21:35:52,315 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:35:52,418 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:35:52,521 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:37:12,571 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:37:12,686 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:37:12,803 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:37:12,913 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:37:13,974 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:37:14,092 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:37:14,215 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:37:14,337 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:37:16,552 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:37:16,665 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:37:16,789 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:37:16,927 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:37:21,987 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:37:22,108 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:37:22,246 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:37:22,401 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:37:22,560 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 21:37:22,694 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-20 21:37:22,822 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:37:22,942 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 21:37:23,056 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:37:23,167 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:37:23,274 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:37:24,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:24,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:11,041 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:38:11,153 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:38:11,267 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:38:11,381 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:38:12,058 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:38:12,174 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:38:12,293 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:38:12,411 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:38:13,660 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:38:13,785 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:38:13,922 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:38:14,058 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:38:16,672 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:38:16,816 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:38:16,966 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:38:17,104 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:38:17,226 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:38:17,344 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 21:38:17,450 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:38:17,557 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:38:17,661 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:38:17,772 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 21:38:17,876 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 21:38:18,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,698 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:38:39,809 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:38:39,922 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:38:40,039 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:38:40,798 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:38:41,006 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:38:41,113 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:38:42,348 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:38:42,479 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:38:42,618 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:38:42,755 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:38:42,887 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:38:43,014 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:38:43,132 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 21:38:43,247 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:38:43,357 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 21:38:44,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,188 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:38:54,297 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:38:54,407 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:38:54,519 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:38:55,254 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:38:55,377 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:38:55,506 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:38:55,639 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:38:55,766 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:38:55,886 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:38:55,997 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:38:56,101 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:38:56,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:56,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:02,385 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:39:02,491 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:39:02,995 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:39:03,106 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:39:03,219 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:39:03,333 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:39:03,442 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:39:03,550 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:39:04,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:08,402 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:39:08,509 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:39:09,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:14,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:17,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:19,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:19,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:19,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:20,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:20,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:20,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:20,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:20,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:20,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49674 refuted. 0 times theorem prover too weak. 2724994 trivial. 0 not checked. [2020-07-20 21:39:46,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985837056] [2020-07-20 21:39:46,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:46,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-20 21:39:46,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226219015] [2020-07-20 21:39:46,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 21:39:46,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:46,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 21:39:46,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 21:39:46,329 INFO L87 Difference]: Start difference. First operand 95 states and 219 transitions. Second operand 34 states. [2020-07-20 21:39:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:48,944 INFO L93 Difference]: Finished difference Result 166 states and 590 transitions. [2020-07-20 21:39:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 21:39:48,948 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 9329 [2020-07-20 21:39:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:48,958 INFO L225 Difference]: With dead ends: 166 [2020-07-20 21:39:48,959 INFO L226 Difference]: Without dead ends: 162 [2020-07-20 21:39:48,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18672 GetRequests, 18598 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 21:39:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-20 21:39:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 95. [2020-07-20 21:39:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 21:39:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-20 21:39:48,984 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 9329 [2020-07-20 21:39:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:48,990 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-20 21:39:48,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 21:39:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-20 21:39:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8373 [2020-07-20 21:39:49,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:49,676 INFO L422 BasicCegarLoop]: trace histogram [745, 745, 542, 542, 474, 372, 372, 372, 372, 372, 372, 372, 372, 271, 271, 271, 271, 271, 271, 271, 271, 170, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:49,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:49,889 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:49,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:49,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1593629950, now seen corresponding path program 13 times [2020-07-20 21:39:49,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:49,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920794815] [2020-07-20 21:39:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:53,160 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:53,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 15779 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 21:39:53,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2222959 backedges. 4739 proven. 46423 refuted. 0 times theorem prover too weak. 2171797 trivial. 0 not checked. [2020-07-20 21:40:14,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:16,645 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:40:16,853 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:40:16,962 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:40:17,511 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:40:17,622 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:40:17,744 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:40:17,861 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:40:18,590 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:40:18,716 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:40:18,852 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:40:18,990 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:40:21,416 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:40:21,556 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:40:21,704 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:40:21,852 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:40:24,382 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:40:24,512 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:40:24,658 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:40:24,824 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:40:27,344 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:40:27,513 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:40:27,689 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 21:40:27,864 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 21:40:37,605 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 76