/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_8-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:36:08,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:36:08,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:36:08,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:36:08,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:36:08,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:36:08,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:36:08,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:36:08,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:36:08,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:36:08,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:36:08,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:36:08,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:36:08,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:36:08,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:36:08,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:36:08,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:36:08,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:36:08,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:36:08,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:36:08,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:36:08,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:36:08,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:36:08,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:36:08,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:36:08,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:36:08,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:36:08,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:36:08,809 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 21:36:08,829 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:36:08,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:36:08,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:36:08,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:36:08,833 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:36:08,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:36:08,833 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:36:08,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:36:08,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:36:08,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:36:08,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:36:08,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:36:08,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:36:08,835 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:36:08,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:36:08,835 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:36:08,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:36:08,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:36:08,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:36:08,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:36:08,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:36:08,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:36:08,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:36:08,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:36:08,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:36:08,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:36:08,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:08,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:36:08,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:36:08,838 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 21:36:09,213 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:36:09,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:36:09,252 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:36:09,254 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:36:09,255 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:36:09,258 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-20 21:36:09,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f3013be/4caa5e12bacb4415b44452e273145640/FLAG53d261e7b [2020-07-20 21:36:10,089 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:36:10,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-20 21:36:10,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f3013be/4caa5e12bacb4415b44452e273145640/FLAG53d261e7b [2020-07-20 21:36:10,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f3013be/4caa5e12bacb4415b44452e273145640 [2020-07-20 21:36:10,377 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:36:10,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:36:10,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:36:10,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:36:10,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:36:10,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:36:10" (1/1) ... [2020-07-20 21:36:10,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e02ab94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:10, skipping insertion in model container [2020-07-20 21:36:10,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:36:10" (1/1) ... [2020-07-20 21:36:10,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:36:10,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:36:10,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:36:10,721 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:36:10,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:36:10,771 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:36:10,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:10 WrapperNode [2020-07-20 21:36:10,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:36:10,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:36:10,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:36:10,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:36:10,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:10" (1/1) ... [2020-07-20 21:36:10,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:10" (1/1) ... [2020-07-20 21:36:10,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:10" (1/1) ... [2020-07-20 21:36:10,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:10" (1/1) ... [2020-07-20 21:36:10,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:10" (1/1) ... [2020-07-20 21:36:10,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:10" (1/1) ... [2020-07-20 21:36:10,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:10" (1/1) ... [2020-07-20 21:36:10,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:36:10,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:36:10,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:36:10,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:36:10,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:10" (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 21:36:11,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:36:11,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:36:11,023 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 21:36:11,024 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 21:36:11,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:36:11,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:36:11,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:36:11,025 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 21:36:11,025 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 21:36:11,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:36:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:36:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:36:11,351 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:36:11,351 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:36:11,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:36:11 BoogieIcfgContainer [2020-07-20 21:36:11,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:36:11,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:36:11,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:36:11,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:36:11,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:36:10" (1/3) ... [2020-07-20 21:36:11,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1011cc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:36:11, skipping insertion in model container [2020-07-20 21:36:11,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:10" (2/3) ... [2020-07-20 21:36:11,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1011cc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:36:11, skipping insertion in model container [2020-07-20 21:36:11,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:36:11" (3/3) ... [2020-07-20 21:36:11,382 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2020-07-20 21:36:11,411 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:36:11,433 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:36:11,474 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:36:11,534 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:36:11,534 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:36:11,536 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:36:11,536 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:36:11,537 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:36:11,537 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:36:11,537 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:36:11,538 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:36:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 21:36:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:36:11,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:11,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:11,603 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:11,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 21:36:11,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:11,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431590988] [2020-07-20 21:36:11,634 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 21:36:11,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:36:11,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:11,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:36:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:11,892 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 21:36:11,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:36:11,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431590988] [2020-07-20 21:36:11,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:36:11,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:36:11,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755717605] [2020-07-20 21:36:11,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:36:11,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:11,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:36:11,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:36:11,932 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 21:36:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:12,116 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 21:36:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:36:12,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 21:36:12,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:12,143 INFO L225 Difference]: With dead ends: 44 [2020-07-20 21:36:12,144 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 21:36:12,150 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 21:36:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 21:36:12,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 21:36:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:36:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 21:36:12,226 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 21:36:12,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:12,227 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 21:36:12,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:36:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 21:36:12,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:36:12,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:12,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:12,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:12,447 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:12,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 21:36:12,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:12,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359766799] [2020-07-20 21:36:12,451 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 21:36:12,494 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:36:12,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:12,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:36:12,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:12,543 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 21:36:12,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:36:12,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359766799] [2020-07-20 21:36:12,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:36:12,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:36:12,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973919582] [2020-07-20 21:36:12,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:36:12,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:12,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:36:12,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:36:12,554 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 21:36:12,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:12,696 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 21:36:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:36:12,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 21:36:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:12,700 INFO L225 Difference]: With dead ends: 36 [2020-07-20 21:36:12,701 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 21:36:12,703 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 21:36:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 21:36:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 21:36:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:36:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 21:36:12,717 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 21:36:12,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:12,718 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 21:36:12,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:36:12,718 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 21:36:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:36:12,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:12,721 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 21:36:12,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:12,936 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:12,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 21:36:12,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:12,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050522740] [2020-07-20 21:36:12,939 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 21:36:12,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:36:12,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:36:12,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:13,075 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 21:36:13,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:13,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:13,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:13,512 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 21:36:13,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050522740] [2020-07-20 21:36:13,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:13,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 21:36:13,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892513247] [2020-07-20 21:36:13,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:36:13,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:13,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:36:13,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:36:13,517 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 21:36:13,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:13,729 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 21:36:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:36:13,731 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 21:36:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:13,733 INFO L225 Difference]: With dead ends: 41 [2020-07-20 21:36:13,734 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 21:36:13,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:36:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 21:36:13,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 21:36:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 21:36:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 21:36:13,749 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 21:36:13,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:13,750 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 21:36:13,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:36:13,750 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 21:36:13,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:36:13,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:13,753 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 21:36:13,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:13,970 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:13,971 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 21:36:13,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:13,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441890899] [2020-07-20 21:36:13,972 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 21:36:14,006 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:36:14,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:14,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:36:14,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:14,120 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 21:36:14,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:14,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:14,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:14,459 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 21:36:14,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441890899] [2020-07-20 21:36:14,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:14,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 21:36:14,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922527095] [2020-07-20 21:36:14,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:36:14,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:36:14,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:36:14,468 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 21:36:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:14,712 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 21:36:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:36:14,713 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 21:36:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:14,717 INFO L225 Difference]: With dead ends: 46 [2020-07-20 21:36:14,717 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 21:36:14,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:36:14,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 21:36:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 21:36:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 21:36:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 21:36:14,740 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 21:36:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:14,741 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 21:36:14,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:36:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 21:36:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 21:36:14,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:14,744 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 21:36:14,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:14,950 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:14,951 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 21:36:14,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:14,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743736763] [2020-07-20 21:36:14,952 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 21:36:15,011 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:15,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:15,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:36:15,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:15,111 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 21:36:15,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:15,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:15,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:15,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:15,637 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 21:36:15,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743736763] [2020-07-20 21:36:15,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:15,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 21:36:15,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550477783] [2020-07-20 21:36:15,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 21:36:15,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:15,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 21:36:15,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:36:15,642 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 21:36:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:15,922 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 21:36:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:36:15,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 21:36:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:15,928 INFO L225 Difference]: With dead ends: 51 [2020-07-20 21:36:15,928 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 21:36:15,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:36:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 21:36:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 21:36:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 21:36:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 21:36:15,962 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 21:36:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:15,962 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 21:36:15,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 21:36:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 21:36:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 21:36:15,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:15,965 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 21:36:16,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:16,173 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:16,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:16,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 21:36:16,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:16,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715872717] [2020-07-20 21:36:16,176 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 21:36:16,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:16,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:16,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:36:16,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:16,288 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 21:36:16,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:16,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:16,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:16,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:16,689 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 21:36:16,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715872717] [2020-07-20 21:36:16,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:16,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 21:36:16,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7861833] [2020-07-20 21:36:16,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 21:36:16,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:16,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 21:36:16,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:36:16,694 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 21:36:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:16,958 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 21:36:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:36:16,962 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 21:36:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:16,969 INFO L225 Difference]: With dead ends: 56 [2020-07-20 21:36:16,970 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 21:36:16,971 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 21:36:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 21:36:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 21:36:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 21:36:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 21:36:16,989 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 21:36:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:16,989 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 21:36:16,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 21:36:16,990 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 21:36:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 21:36:16,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:16,993 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 21:36:17,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:17,196 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:17,197 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 21:36:17,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:17,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710157863] [2020-07-20 21:36:17,198 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 21:36:17,245 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:17,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:36:17,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:17,365 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 21:36:17,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:17,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:17,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:18,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:18,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:18,209 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 21:36:18,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710157863] [2020-07-20 21:36:18,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:18,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 21:36:18,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006496115] [2020-07-20 21:36:18,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:36:18,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:18,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:36:18,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:36:18,215 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 21:36:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:18,516 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 21:36:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:36:18,517 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 21:36:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:18,520 INFO L225 Difference]: With dead ends: 61 [2020-07-20 21:36:18,520 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 21:36:18,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:36:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 21:36:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 21:36:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 21:36:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 21:36:18,536 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 21:36:18,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:18,537 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 21:36:18,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:36:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 21:36:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 21:36:18,541 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:18,541 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 21:36:18,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:18,757 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:18,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:18,758 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 21:36:18,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:18,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336342244] [2020-07-20 21:36:18,759 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 21:36:18,811 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:18,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:18,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:36:18,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:18,924 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 21:36:18,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:19,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:19,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:19,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:19,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:19,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:19,596 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 21:36:19,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336342244] [2020-07-20 21:36:19,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:19,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 21:36:19,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113853985] [2020-07-20 21:36:19,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:36:19,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:19,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:36:19,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:36:19,606 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-20 21:36:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:19,886 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 21:36:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:36:19,887 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 21:36:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:19,890 INFO L225 Difference]: With dead ends: 66 [2020-07-20 21:36:19,891 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 21:36:19,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:36:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 21:36:19,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 21:36:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 21:36:19,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 21:36:19,906 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 21:36:19,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:19,907 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 21:36:19,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:36:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 21:36:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 21:36:19,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:19,910 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 21:36:20,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:20,125 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:20,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:20,126 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 21:36:20,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:20,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543733966] [2020-07-20 21:36:20,127 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 21:36:20,192 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:20,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:20,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:36:20,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:20,314 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 21:36:20,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:21,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:21,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:21,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:21,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:21,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:21,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:21,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:21,461 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 21:36:21,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543733966] [2020-07-20 21:36:21,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:21,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 21:36:21,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765123186] [2020-07-20 21:36:21,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:36:21,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:21,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:36:21,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:36:21,465 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-20 21:36:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:21,804 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 21:36:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:36:21,805 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-20 21:36:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:21,808 INFO L225 Difference]: With dead ends: 71 [2020-07-20 21:36:21,808 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 21:36:21,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:36:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 21:36:21,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 21:36:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 21:36:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 21:36:21,825 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 21:36:21,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:21,826 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 21:36:21,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:36:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 21:36:21,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 21:36:21,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:21,829 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 21:36:22,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:22,045 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:22,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 21:36:22,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:22,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050049433] [2020-07-20 21:36:22,047 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 21:36:22,127 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:22,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:22,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:36:22,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:22,240 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 21:36:22,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:22,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:23,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:23,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:23,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:23,402 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 21:36:23,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050049433] [2020-07-20 21:36:23,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:23,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 21:36:23,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057054422] [2020-07-20 21:36:23,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:36:23,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:23,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:36:23,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:36:23,406 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-20 21:36:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:23,703 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-20 21:36:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:36:23,704 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-20 21:36:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:23,707 INFO L225 Difference]: With dead ends: 76 [2020-07-20 21:36:23,707 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 21:36:23,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:36:23,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 21:36:23,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 21:36:23,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 21:36:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 21:36:23,724 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-20 21:36:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:23,726 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 21:36:23,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:36:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 21:36:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 21:36:23,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:23,730 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 21:36:23,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:23,945 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:23,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:23,946 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-20 21:36:23,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:23,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841325535] [2020-07-20 21:36:23,947 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 21:36:24,062 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:24,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:24,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:36:24,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:24,196 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 21:36:24,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:25,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:25,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:25,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:25,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:25,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:26,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:26,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:26,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:26,203 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 21:36:26,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841325535] [2020-07-20 21:36:26,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:26,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 21:36:26,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067318027] [2020-07-20 21:36:26,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:36:26,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:36:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:36:26,207 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-20 21:36:26,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:26,544 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-20 21:36:26,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:36:26,546 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-20 21:36:26,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:26,549 INFO L225 Difference]: With dead ends: 81 [2020-07-20 21:36:26,550 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 21:36:26,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:36:26,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 21:36:26,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-20 21:36:26,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 21:36:26,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 21:36:26,567 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-20 21:36:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:26,568 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 21:36:26,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:36:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 21:36:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 21:36:26,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:26,571 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 21:36:26,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:26,786 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:26,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:26,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-20 21:36:26,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:26,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468782595] [2020-07-20 21:36:26,789 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 21:36:26,881 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:26,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:26,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:36:26,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:26,995 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 21:36:26,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:28,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,704 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 21:36:28,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468782595] [2020-07-20 21:36:28,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:28,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 21:36:28,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958799932] [2020-07-20 21:36:28,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:36:28,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:28,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:36:28,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:36:28,710 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-20 21:36:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:29,159 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-20 21:36:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:36:29,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-20 21:36:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:29,167 INFO L225 Difference]: With dead ends: 86 [2020-07-20 21:36:29,167 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 21:36:29,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:36:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 21:36:29,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-20 21:36:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 21:36:29,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 21:36:29,208 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-20 21:36:29,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:29,209 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 21:36:29,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:36:29,210 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 21:36:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-20 21:36:29,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:29,216 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 21:36:29,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:29,431 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:29,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-20 21:36:29,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:29,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215451433] [2020-07-20 21:36:29,434 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 21:36:29,599 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:29,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:29,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:36:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:29,750 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 21:36:29,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:31,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:32,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:32,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:32,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:32,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:32,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:32,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:32,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:32,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:32,504 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 21:36:32,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215451433] [2020-07-20 21:36:32,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:32,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 21:36:32,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872909056] [2020-07-20 21:36:32,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:36:32,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:32,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:36:32,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:36:32,507 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-20 21:36:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:33,059 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-20 21:36:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:36:33,059 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-20 21:36:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:33,063 INFO L225 Difference]: With dead ends: 91 [2020-07-20 21:36:33,063 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 21:36:33,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:36:33,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 21:36:33,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-20 21:36:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 21:36:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 21:36:33,078 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-20 21:36:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:33,079 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 21:36:33,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:36:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 21:36:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 21:36:33,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:33,083 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 21:36:33,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:33,297 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-20 21:36:33,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:33,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294111083] [2020-07-20 21:36:33,300 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 21:36:33,442 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:33,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:33,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:36:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:33,589 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 21:36:33,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:35,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:35,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:35,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,416 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 21:36:36,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294111083] [2020-07-20 21:36:36,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:36,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:36:36,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766917126] [2020-07-20 21:36:36,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:36:36,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:36,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:36:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:36:36,419 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 19 states. [2020-07-20 21:36:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:36,893 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-20 21:36:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:36:36,894 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-20 21:36:36,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:36,902 INFO L225 Difference]: With dead ends: 96 [2020-07-20 21:36:36,902 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 21:36:36,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:36:36,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 21:36:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-20 21:36:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 21:36:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 21:36:36,922 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-20 21:36:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:36,923 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 21:36:36,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:36:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 21:36:36,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 21:36:36,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:36,927 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 21:36:37,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:37,141 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:37,142 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-20 21:36:37,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:37,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615748532] [2020-07-20 21:36:37,143 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 21:36:37,347 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:37,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:37,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:36:37,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:37,582 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 21:36:37,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:39,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:39,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:41,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:41,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:41,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:41,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:41,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:41,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:42,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:42,196 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 21:36:42,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615748532] [2020-07-20 21:36:42,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:42,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:36:42,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905431190] [2020-07-20 21:36:42,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:36:42,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:42,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:36:42,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:36:42,199 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 21 states. [2020-07-20 21:36:42,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:42,834 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-20 21:36:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:36:42,836 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-07-20 21:36:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:42,843 INFO L225 Difference]: With dead ends: 101 [2020-07-20 21:36:42,843 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 21:36:42,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:36:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 21:36:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-20 21:36:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 21:36:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 21:36:42,872 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-20 21:36:42,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:42,875 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 21:36:42,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:36:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 21:36:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-07-20 21:36:42,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:42,881 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 19, 17, 17, 13, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 8, 8, 8, 8, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:43,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:43,095 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:43,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1494010988, now seen corresponding path program 3 times [2020-07-20 21:36:43,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:43,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696754408] [2020-07-20 21:36:43,097 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 21:36:43,352 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:43,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:36:43,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 533 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 21:36:43,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:45,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:45,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:46,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:46,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:46,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:46,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:46,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:46,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:46,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 554 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2020-07-20 21:36:47,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696754408] [2020-07-20 21:36:47,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:47,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:36:47,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758932199] [2020-07-20 21:36:47,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:36:47,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:47,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:36:47,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:36:47,285 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 19 states. [2020-07-20 21:36:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:47,848 INFO L93 Difference]: Finished difference Result 129 states and 362 transitions. [2020-07-20 21:36:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:36:47,849 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 297 [2020-07-20 21:36:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:47,854 INFO L225 Difference]: With dead ends: 129 [2020-07-20 21:36:47,855 INFO L226 Difference]: Without dead ends: 125 [2020-07-20 21:36:47,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:36:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-20 21:36:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2020-07-20 21:36:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 21:36:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 120 transitions. [2020-07-20 21:36:47,877 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 120 transitions. Word has length 297 [2020-07-20 21:36:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:47,878 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 120 transitions. [2020-07-20 21:36:47,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:36:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 120 transitions. [2020-07-20 21:36:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-20 21:36:47,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:47,883 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 25, 25, 25, 23, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:48,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:48,097 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:48,097 INFO L82 PathProgramCache]: Analyzing trace with hash -948476032, now seen corresponding path program 1 times [2020-07-20 21:36:48,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:48,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937832275] [2020-07-20 21:36:48,098 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 21:36:48,376 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:48,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:48,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:36:48,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 707 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-20 21:36:48,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:50,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:50,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 723 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-20 21:36:51,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937832275] [2020-07-20 21:36:51,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:51,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:36:51,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518513445] [2020-07-20 21:36:51,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:36:51,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:51,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:36:51,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:36:51,482 INFO L87 Difference]: Start difference. First operand 67 states and 120 transitions. Second operand 17 states. [2020-07-20 21:36:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:51,936 INFO L93 Difference]: Finished difference Result 139 states and 413 transitions. [2020-07-20 21:36:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:36:51,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-20 21:36:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:51,944 INFO L225 Difference]: With dead ends: 139 [2020-07-20 21:36:51,945 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 21:36:51,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 790 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:36:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 21:36:51,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-07-20 21:36:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 21:36:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 127 transitions. [2020-07-20 21:36:51,975 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 127 transitions. Word has length 409 [2020-07-20 21:36:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:51,977 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 127 transitions. [2020-07-20 21:36:51,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:36:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 127 transitions. [2020-07-20 21:36:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-20 21:36:51,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:51,983 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 32, 30, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:52,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:52,199 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:52,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1385064961, now seen corresponding path program 1 times [2020-07-20 21:36:52,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:52,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633727780] [2020-07-20 21:36:52,201 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 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 21:36:52,530 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:52,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:52,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:36:52,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 323 proven. 1216 refuted. 0 times theorem prover too weak. 6692 trivial. 0 not checked. [2020-07-20 21:36:53,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:55,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:56,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:57,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 327 proven. 1245 refuted. 0 times theorem prover too weak. 6659 trivial. 0 not checked. [2020-07-20 21:36:58,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633727780] [2020-07-20 21:36:58,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:58,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:36:58,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710377114] [2020-07-20 21:36:58,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:36:58,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:58,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:36:58,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:36:58,652 INFO L87 Difference]: Start difference. First operand 69 states and 127 transitions. Second operand 21 states. [2020-07-20 21:36:59,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:59,683 INFO L93 Difference]: Finished difference Result 166 states and 566 transitions. [2020-07-20 21:36:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:36:59,684 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 531 [2020-07-20 21:36:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:59,688 INFO L225 Difference]: With dead ends: 166 [2020-07-20 21:36:59,688 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 21:36:59,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1025 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:36:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 21:36:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-20 21:36:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 21:36:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2020-07-20 21:36:59,717 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 531 [2020-07-20 21:36:59,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:59,720 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2020-07-20 21:36:59,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:36:59,720 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2020-07-20 21:36:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-20 21:36:59,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:59,727 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 25, 24, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:59,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:59,941 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:59,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1214630406, now seen corresponding path program 2 times [2020-07-20 21:36:59,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:59,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034812014] [2020-07-20 21:36:59,942 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 21:37:00,278 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:00,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:37:00,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 884 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2020-07-20 21:37:00,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:02,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:03,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:03,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:03,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 905 refuted. 0 times theorem prover too weak. 4819 trivial. 0 not checked. [2020-07-20 21:37:04,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034812014] [2020-07-20 21:37:04,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:04,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:37:04,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341305701] [2020-07-20 21:37:04,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:37:04,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:04,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:37:04,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:37:04,679 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand 19 states. [2020-07-20 21:37:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:05,255 INFO L93 Difference]: Finished difference Result 167 states and 414 transitions. [2020-07-20 21:37:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:37:05,257 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 458 [2020-07-20 21:37:05,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:05,262 INFO L225 Difference]: With dead ends: 167 [2020-07-20 21:37:05,263 INFO L226 Difference]: Without dead ends: 153 [2020-07-20 21:37:05,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 883 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:37:05,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-20 21:37:05,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2020-07-20 21:37:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 21:37:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 160 transitions. [2020-07-20 21:37:05,287 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 160 transitions. Word has length 458 [2020-07-20 21:37:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:05,288 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 160 transitions. [2020-07-20 21:37:05,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:37:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 160 transitions. [2020-07-20 21:37:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-07-20 21:37:05,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:05,297 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 24, 20, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:05,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:05,511 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:05,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:05,511 INFO L82 PathProgramCache]: Analyzing trace with hash 605039004, now seen corresponding path program 3 times [2020-07-20 21:37:05,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:05,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157961891] [2020-07-20 21:37:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:37:05,834 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:05,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:05,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:37:05,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 290 proven. 753 refuted. 0 times theorem prover too weak. 3047 trivial. 0 not checked. [2020-07-20 21:37:06,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:08,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:08,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:09,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:09,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 292 proven. 784 refuted. 0 times theorem prover too weak. 3014 trivial. 0 not checked. [2020-07-20 21:37:11,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157961891] [2020-07-20 21:37:11,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:11,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:37:11,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010691594] [2020-07-20 21:37:11,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:37:11,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:11,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:37:11,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:37:11,098 INFO L87 Difference]: Start difference. First operand 94 states and 160 transitions. Second operand 21 states. [2020-07-20 21:37:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:11,893 INFO L93 Difference]: Finished difference Result 191 states and 508 transitions. [2020-07-20 21:37:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:37:11,894 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 381 [2020-07-20 21:37:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:11,898 INFO L225 Difference]: With dead ends: 191 [2020-07-20 21:37:11,898 INFO L226 Difference]: Without dead ends: 105 [2020-07-20 21:37:11,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 725 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:37:11,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-20 21:37:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-07-20 21:37:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 21:37:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 171 transitions. [2020-07-20 21:37:11,916 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 171 transitions. Word has length 381 [2020-07-20 21:37:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:11,917 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 171 transitions. [2020-07-20 21:37:11,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:37:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 171 transitions. [2020-07-20 21:37:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-20 21:37:11,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:11,923 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 29, 29, 27, 24, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:12,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:12,139 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:12,140 INFO L82 PathProgramCache]: Analyzing trace with hash 878417150, now seen corresponding path program 4 times [2020-07-20 21:37:12,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:12,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487126453] [2020-07-20 21:37:12,140 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 21:37:12,503 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:12,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:12,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:37:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5403 backedges. 196 proven. 740 refuted. 0 times theorem prover too weak. 4467 trivial. 0 not checked. [2020-07-20 21:37:12,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:14,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:14,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5403 backedges. 196 proven. 756 refuted. 0 times theorem prover too weak. 4451 trivial. 0 not checked. [2020-07-20 21:37:15,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487126453] [2020-07-20 21:37:15,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:15,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:37:15,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440879638] [2020-07-20 21:37:15,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:37:15,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:15,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:37:15,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:37:15,810 INFO L87 Difference]: Start difference. First operand 99 states and 171 transitions. Second operand 17 states. [2020-07-20 21:37:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:16,259 INFO L93 Difference]: Finished difference Result 178 states and 428 transitions. [2020-07-20 21:37:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:16,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 436 [2020-07-20 21:37:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:16,268 INFO L225 Difference]: With dead ends: 178 [2020-07-20 21:37:16,268 INFO L226 Difference]: Without dead ends: 163 [2020-07-20 21:37:16,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 843 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:37:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-20 21:37:16,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2020-07-20 21:37:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 21:37:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 192 transitions. [2020-07-20 21:37:16,294 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 192 transitions. Word has length 436 [2020-07-20 21:37:16,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:16,295 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 192 transitions. [2020-07-20 21:37:16,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:37:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 192 transitions. [2020-07-20 21:37:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2020-07-20 21:37:16,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:16,300 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 22, 20, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:16,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:16,512 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:16,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:16,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1540588470, now seen corresponding path program 5 times [2020-07-20 21:37:16,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:16,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698920608] [2020-07-20 21:37:16,514 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 21:37:16,879 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:16,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:16,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:37:16,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4577 backedges. 216 proven. 753 refuted. 0 times theorem prover too weak. 3608 trivial. 0 not checked. [2020-07-20 21:37:17,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:19,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:19,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:20,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:20,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:20,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:20,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:20,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:20,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:20,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:20,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4577 backedges. 218 proven. 772 refuted. 0 times theorem prover too weak. 3587 trivial. 0 not checked. [2020-07-20 21:37:21,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698920608] [2020-07-20 21:37:21,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:21,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:37:21,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492746337] [2020-07-20 21:37:21,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:37:21,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:21,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:37:21,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:37:21,062 INFO L87 Difference]: Start difference. First operand 106 states and 192 transitions. Second operand 19 states. [2020-07-20 21:37:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:21,612 INFO L93 Difference]: Finished difference Result 172 states and 408 transitions. [2020-07-20 21:37:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:37:21,616 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 403 [2020-07-20 21:37:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:21,619 INFO L225 Difference]: With dead ends: 172 [2020-07-20 21:37:21,619 INFO L226 Difference]: Without dead ends: 157 [2020-07-20 21:37:21,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 773 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:37:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-20 21:37:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2020-07-20 21:37:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-20 21:37:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-20 21:37:21,643 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 403 [2020-07-20 21:37:21,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:21,644 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-20 21:37:21,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:37:21,644 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-20 21:37:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-07-20 21:37:21,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:21,649 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 24, 20, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:21,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:21,863 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:21,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:21,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1380355443, now seen corresponding path program 6 times [2020-07-20 21:37:21,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:21,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659710990] [2020-07-20 21:37:21,865 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 21:37:22,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:22,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:22,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:37:22,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4330 backedges. 220 proven. 590 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2020-07-20 21:37:22,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:24,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:24,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:24,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:24,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:25,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:25,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:25,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:25,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4330 backedges. 220 proven. 604 refuted. 0 times theorem prover too weak. 3506 trivial. 0 not checked. [2020-07-20 21:37:25,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659710990] [2020-07-20 21:37:25,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:25,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:37:25,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359516342] [2020-07-20 21:37:25,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:37:25,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:37:25,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:37:25,367 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-20 21:37:25,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:25,881 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2020-07-20 21:37:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:25,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 393 [2020-07-20 21:37:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:25,888 INFO L225 Difference]: With dead ends: 190 [2020-07-20 21:37:25,888 INFO L226 Difference]: Without dead ends: 178 [2020-07-20 21:37:25,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 757 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:37:25,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-20 21:37:25,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2020-07-20 21:37:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-20 21:37:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-20 21:37:25,915 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 393 [2020-07-20 21:37:25,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:25,916 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-20 21:37:25,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:37:25,917 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-20 21:37:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-07-20 21:37:25,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:25,922 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 24, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:26,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:26,137 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:26,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:26,138 INFO L82 PathProgramCache]: Analyzing trace with hash -636889236, now seen corresponding path program 7 times [2020-07-20 21:37:26,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:26,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777996664] [2020-07-20 21:37:26,140 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 21:37:26,530 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:26,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:26,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:37:26,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 432 proven. 691 refuted. 0 times theorem prover too weak. 3562 trivial. 0 not checked. [2020-07-20 21:37:26,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:29,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:31,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:31,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:31,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:31,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:31,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:32,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:32,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:32,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:32,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:32,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 434 proven. 722 refuted. 0 times theorem prover too weak. 3529 trivial. 0 not checked. [2020-07-20 21:37:32,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777996664] [2020-07-20 21:37:32,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:32,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:37:32,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732683439] [2020-07-20 21:37:32,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:37:32,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:32,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:37:32,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:37:32,590 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 21 states. [2020-07-20 21:37:33,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:33,267 INFO L93 Difference]: Finished difference Result 145 states and 272 transitions. [2020-07-20 21:37:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:37:33,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 408 [2020-07-20 21:37:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:33,276 INFO L225 Difference]: With dead ends: 145 [2020-07-20 21:37:33,277 INFO L226 Difference]: Without dead ends: 117 [2020-07-20 21:37:33,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 779 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:37:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-20 21:37:33,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-07-20 21:37:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-20 21:37:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 201 transitions. [2020-07-20 21:37:33,295 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 201 transitions. Word has length 408 [2020-07-20 21:37:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:33,296 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 201 transitions. [2020-07-20 21:37:33,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:37:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 201 transitions. [2020-07-20 21:37:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-20 21:37:33,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:33,302 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 25, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 11, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:33,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:33,517 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash 315905302, now seen corresponding path program 8 times [2020-07-20 21:37:33,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:33,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752854471] [2020-07-20 21:37:33,518 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 21:37:33,951 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:33,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:33,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:37:33,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4709 backedges. 256 proven. 607 refuted. 0 times theorem prover too weak. 3846 trivial. 0 not checked. [2020-07-20 21:37:34,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:36,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:37,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:37,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:37,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:37,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:37,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:37,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:37,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:37,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4709 backedges. 258 proven. 621 refuted. 0 times theorem prover too weak. 3830 trivial. 0 not checked. [2020-07-20 21:37:38,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752854471] [2020-07-20 21:37:38,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:38,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:37:38,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135058119] [2020-07-20 21:37:38,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:37:38,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:38,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:37:38,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:37:38,038 INFO L87 Difference]: Start difference. First operand 117 states and 201 transitions. Second operand 17 states. [2020-07-20 21:37:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:38,459 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2020-07-20 21:37:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:38,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-20 21:37:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:38,465 INFO L225 Difference]: With dead ends: 164 [2020-07-20 21:37:38,466 INFO L226 Difference]: Without dead ends: 155 [2020-07-20 21:37:38,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 789 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:37:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-20 21:37:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-07-20 21:37:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-20 21:37:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 240 transitions. [2020-07-20 21:37:38,496 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 240 transitions. Word has length 409 [2020-07-20 21:37:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:38,497 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 240 transitions. [2020-07-20 21:37:38,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:37:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 240 transitions. [2020-07-20 21:37:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-20 21:37:38,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:38,504 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 34, 27, 26, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 14, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:38,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:38,720 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:38,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1440475136, now seen corresponding path program 9 times [2020-07-20 21:37:38,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:38,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28771728] [2020-07-20 21:37:38,722 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 21:37:39,247 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:39,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:39,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:37:39,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7504 backedges. 328 proven. 944 refuted. 0 times theorem prover too weak. 6232 trivial. 0 not checked. [2020-07-20 21:37:39,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:42,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:42,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:43,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:43,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:43,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:44,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:44,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:44,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:44,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7504 backedges. 330 proven. 963 refuted. 0 times theorem prover too weak. 6211 trivial. 0 not checked. [2020-07-20 21:37:44,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28771728] [2020-07-20 21:37:44,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:44,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:37:44,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938198514] [2020-07-20 21:37:44,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:37:44,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:44,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:37:44,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:37:44,647 INFO L87 Difference]: Start difference. First operand 129 states and 240 transitions. Second operand 19 states. [2020-07-20 21:37:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:45,166 INFO L93 Difference]: Finished difference Result 172 states and 344 transitions. [2020-07-20 21:37:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:37:45,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 510 [2020-07-20 21:37:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:45,172 INFO L225 Difference]: With dead ends: 172 [2020-07-20 21:37:45,172 INFO L226 Difference]: Without dead ends: 163 [2020-07-20 21:37:45,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 987 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:37:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-20 21:37:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2020-07-20 21:37:45,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-20 21:37:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 225 transitions. [2020-07-20 21:37:45,194 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 225 transitions. Word has length 510 [2020-07-20 21:37:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:45,195 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 225 transitions. [2020-07-20 21:37:45,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:37:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 225 transitions. [2020-07-20 21:37:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-07-20 21:37:45,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:45,201 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 21, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:45,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:45,417 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:45,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1734245441, now seen corresponding path program 10 times [2020-07-20 21:37:45,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:45,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510295885] [2020-07-20 21:37:45,419 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 21:37:45,915 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:45,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:45,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:37:45,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4327 backedges. 269 proven. 538 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2020-07-20 21:37:46,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:48,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:48,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:48,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:48,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:48,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:48,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:49,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:49,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:49,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:49,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:49,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4327 backedges. 269 proven. 554 refuted. 0 times theorem prover too weak. 3504 trivial. 0 not checked. [2020-07-20 21:37:49,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510295885] [2020-07-20 21:37:49,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:49,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:37:49,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975054518] [2020-07-20 21:37:49,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:37:49,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:49,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:37:49,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:37:49,539 INFO L87 Difference]: Start difference. First operand 125 states and 225 transitions. Second operand 17 states. [2020-07-20 21:37:49,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:49,955 INFO L93 Difference]: Finished difference Result 184 states and 375 transitions. [2020-07-20 21:37:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:49,957 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 393 [2020-07-20 21:37:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:49,960 INFO L225 Difference]: With dead ends: 184 [2020-07-20 21:37:49,960 INFO L226 Difference]: Without dead ends: 175 [2020-07-20 21:37:49,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 757 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:37:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-20 21:37:49,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 122. [2020-07-20 21:37:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-20 21:37:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 215 transitions. [2020-07-20 21:37:49,983 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 215 transitions. Word has length 393 [2020-07-20 21:37:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:49,983 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 215 transitions. [2020-07-20 21:37:49,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:37:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 215 transitions. [2020-07-20 21:37:49,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 21:37:49,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:49,990 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 29, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:50,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:50,206 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:50,207 INFO L82 PathProgramCache]: Analyzing trace with hash -864101234, now seen corresponding path program 11 times [2020-07-20 21:37:50,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:50,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685515550] [2020-07-20 21:37:50,208 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 21:37:50,740 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:50,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:50,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:37:50,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6848 backedges. 267 proven. 623 refuted. 0 times theorem prover too weak. 5958 trivial. 0 not checked. [2020-07-20 21:37:51,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:53,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:53,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:53,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:53,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:53,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:53,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:54,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:54,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6848 backedges. 267 proven. 633 refuted. 0 times theorem prover too weak. 5948 trivial. 0 not checked. [2020-07-20 21:37:54,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685515550] [2020-07-20 21:37:54,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:54,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:37:54,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977767801] [2020-07-20 21:37:54,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:37:54,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:54,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:37:54,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:37:54,465 INFO L87 Difference]: Start difference. First operand 122 states and 215 transitions. Second operand 15 states. [2020-07-20 21:37:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:54,820 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-07-20 21:37:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:37:54,822 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 490 [2020-07-20 21:37:54,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:54,827 INFO L225 Difference]: With dead ends: 212 [2020-07-20 21:37:54,828 INFO L226 Difference]: Without dead ends: 203 [2020-07-20 21:37:54,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 955 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:37:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-20 21:37:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 124. [2020-07-20 21:37:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-20 21:37:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 224 transitions. [2020-07-20 21:37:54,857 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 224 transitions. Word has length 490 [2020-07-20 21:37:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:54,859 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 224 transitions. [2020-07-20 21:37:54,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:37:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 224 transitions. [2020-07-20 21:37:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-07-20 21:37:54,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:54,870 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 50, 50, 42, 41, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 16, 16, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:55,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:55,086 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:55,087 INFO L82 PathProgramCache]: Analyzing trace with hash 792643710, now seen corresponding path program 12 times [2020-07-20 21:37:55,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:55,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251546027] [2020-07-20 21:37:55,088 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 21:37:55,736 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:55,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:37:55,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14593 backedges. 698 proven. 1405 refuted. 0 times theorem prover too weak. 12490 trivial. 0 not checked. [2020-07-20 21:37:56,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:00,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:01,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:02,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:02,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:02,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:03,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:03,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:03,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:03,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:03,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:03,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:03,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14593 backedges. 698 proven. 1438 refuted. 0 times theorem prover too weak. 12457 trivial. 0 not checked. [2020-07-20 21:38:04,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251546027] [2020-07-20 21:38:04,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:04,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:38:04,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666501352] [2020-07-20 21:38:04,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:38:04,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:04,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:38:04,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:38:04,220 INFO L87 Difference]: Start difference. First operand 124 states and 224 transitions. Second operand 21 states. [2020-07-20 21:38:05,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:05,069 INFO L93 Difference]: Finished difference Result 158 states and 288 transitions. [2020-07-20 21:38:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:38:05,071 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 708 [2020-07-20 21:38:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:05,075 INFO L225 Difference]: With dead ends: 158 [2020-07-20 21:38:05,075 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 21:38:05,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1423 GetRequests, 1379 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:38:05,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 21:38:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2020-07-20 21:38:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-20 21:38:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 234 transitions. [2020-07-20 21:38:05,096 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 234 transitions. Word has length 708 [2020-07-20 21:38:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:05,097 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 234 transitions. [2020-07-20 21:38:05,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:38:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 234 transitions. [2020-07-20 21:38:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-20 21:38:05,102 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:05,102 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 23, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:05,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:05,316 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:05,316 INFO L82 PathProgramCache]: Analyzing trace with hash -272522078, now seen corresponding path program 13 times [2020-07-20 21:38:05,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:05,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943069846] [2020-07-20 21:38:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:05,805 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:05,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:05,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:38:05,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 393 proven. 465 refuted. 0 times theorem prover too weak. 3774 trivial. 0 not checked. [2020-07-20 21:38:06,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:08,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:08,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:08,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:08,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:08,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:08,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:09,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 395 proven. 479 refuted. 0 times theorem prover too weak. 3758 trivial. 0 not checked. [2020-07-20 21:38:09,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943069846] [2020-07-20 21:38:09,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:09,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:38:09,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521183389] [2020-07-20 21:38:09,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:38:09,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:09,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:38:09,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:38:09,573 INFO L87 Difference]: Start difference. First operand 132 states and 234 transitions. Second operand 17 states. [2020-07-20 21:38:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:10,037 INFO L93 Difference]: Finished difference Result 189 states and 398 transitions. [2020-07-20 21:38:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:38:10,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 406 [2020-07-20 21:38:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:10,043 INFO L225 Difference]: With dead ends: 189 [2020-07-20 21:38:10,043 INFO L226 Difference]: Without dead ends: 180 [2020-07-20 21:38:10,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 783 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:38:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-07-20 21:38:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2020-07-20 21:38:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-20 21:38:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 300 transitions. [2020-07-20 21:38:10,073 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 300 transitions. Word has length 406 [2020-07-20 21:38:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:10,074 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 300 transitions. [2020-07-20 21:38:10,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:38:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 300 transitions. [2020-07-20 21:38:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-20 21:38:10,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:10,083 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 28, 28, 24, 23, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 10, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:10,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:10,297 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:10,298 INFO L82 PathProgramCache]: Analyzing trace with hash -85973297, now seen corresponding path program 14 times [2020-07-20 21:38:10,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:10,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562413083] [2020-07-20 21:38:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:11,010 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:11,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:11,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:38:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 396 proven. 641 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-07-20 21:38:11,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:13,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:14,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:15,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:15,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:15,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:15,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:15,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:15,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:15,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 400 proven. 661 refuted. 0 times theorem prover too weak. 3936 trivial. 0 not checked. [2020-07-20 21:38:16,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562413083] [2020-07-20 21:38:16,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:16,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:38:16,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223356575] [2020-07-20 21:38:16,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:38:16,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:16,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:38:16,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:38:16,242 INFO L87 Difference]: Start difference. First operand 152 states and 300 transitions. Second operand 19 states. [2020-07-20 21:38:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:16,918 INFO L93 Difference]: Finished difference Result 218 states and 466 transitions. [2020-07-20 21:38:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:38:16,919 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 420 [2020-07-20 21:38:16,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:16,923 INFO L225 Difference]: With dead ends: 218 [2020-07-20 21:38:16,923 INFO L226 Difference]: Without dead ends: 184 [2020-07-20 21:38:16,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 807 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:38:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-20 21:38:16,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2020-07-20 21:38:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-07-20 21:38:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 362 transitions. [2020-07-20 21:38:16,947 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 362 transitions. Word has length 420 [2020-07-20 21:38:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:16,947 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 362 transitions. [2020-07-20 21:38:16,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:38:16,948 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 362 transitions. [2020-07-20 21:38:16,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2020-07-20 21:38:16,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:16,955 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 26, 26, 21, 21, 16, 16, 16, 16, 16, 16, 16, 13, 13, 13, 13, 13, 13, 13, 12, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:17,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:17,170 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash 279215508, now seen corresponding path program 15 times [2020-07-20 21:38:17,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:17,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113635449] [2020-07-20 21:38:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:17,685 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:17,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:17,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:38:17,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 505 proven. 470 refuted. 0 times theorem prover too weak. 3649 trivial. 0 not checked. [2020-07-20 21:38:17,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:20,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:21,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:21,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:21,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:21,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:21,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:21,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:21,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:21,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:22,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:22,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:22,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 509 proven. 487 refuted. 0 times theorem prover too weak. 3628 trivial. 0 not checked. [2020-07-20 21:38:22,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113635449] [2020-07-20 21:38:22,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:22,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:38:22,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361483417] [2020-07-20 21:38:22,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:38:22,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:22,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:38:22,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:38:22,931 INFO L87 Difference]: Start difference. First operand 175 states and 362 transitions. Second operand 19 states. [2020-07-20 21:38:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:23,609 INFO L93 Difference]: Finished difference Result 234 states and 522 transitions. [2020-07-20 21:38:23,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:38:23,612 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 403 [2020-07-20 21:38:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:23,618 INFO L225 Difference]: With dead ends: 234 [2020-07-20 21:38:23,618 INFO L226 Difference]: Without dead ends: 225 [2020-07-20 21:38:23,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 773 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:38:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-20 21:38:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2020-07-20 21:38:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-20 21:38:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 332 transitions. [2020-07-20 21:38:23,673 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 332 transitions. Word has length 403 [2020-07-20 21:38:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:23,674 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 332 transitions. [2020-07-20 21:38:23,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:38:23,674 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 332 transitions. [2020-07-20 21:38:23,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-07-20 21:38:23,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:23,684 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 23, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:23,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:23,899 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:23,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1165748393, now seen corresponding path program 16 times [2020-07-20 21:38:23,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:23,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356244315] [2020-07-20 21:38:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:24,435 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:24,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:24,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:38:24,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4993 backedges. 402 proven. 473 refuted. 0 times theorem prover too weak. 4118 trivial. 0 not checked. [2020-07-20 21:38:24,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:26,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:27,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:27,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:27,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:27,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:27,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:28,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:28,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4993 backedges. 404 proven. 485 refuted. 0 times theorem prover too weak. 4104 trivial. 0 not checked. [2020-07-20 21:38:28,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356244315] [2020-07-20 21:38:28,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:28,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:38:28,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072911757] [2020-07-20 21:38:28,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:38:28,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:28,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:38:28,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:38:28,815 INFO L87 Difference]: Start difference. First operand 168 states and 332 transitions. Second operand 17 states. [2020-07-20 21:38:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:29,300 INFO L93 Difference]: Finished difference Result 260 states and 600 transitions. [2020-07-20 21:38:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:38:29,302 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 421 [2020-07-20 21:38:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:29,307 INFO L225 Difference]: With dead ends: 260 [2020-07-20 21:38:29,307 INFO L226 Difference]: Without dead ends: 251 [2020-07-20 21:38:29,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 813 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:38:29,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-20 21:38:29,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 163. [2020-07-20 21:38:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-20 21:38:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 311 transitions. [2020-07-20 21:38:29,341 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 311 transitions. Word has length 421 [2020-07-20 21:38:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:29,342 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 311 transitions. [2020-07-20 21:38:29,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:38:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 311 transitions. [2020-07-20 21:38:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2020-07-20 21:38:29,349 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:29,350 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 34, 31, 28, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 14, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:29,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:29,565 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:29,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:29,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1765002334, now seen corresponding path program 17 times [2020-07-20 21:38:29,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:29,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494630651] [2020-07-20 21:38:29,567 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:30,142 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:30,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:30,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:38:30,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7671 backedges. 316 proven. 777 refuted. 0 times theorem prover too weak. 6578 trivial. 0 not checked. [2020-07-20 21:38:30,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:33,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:33,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:34,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:34,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:34,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:34,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:34,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:34,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:34,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:35,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7671 backedges. 318 proven. 789 refuted. 0 times theorem prover too weak. 6564 trivial. 0 not checked. [2020-07-20 21:38:35,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494630651] [2020-07-20 21:38:35,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:35,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:38:35,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041541682] [2020-07-20 21:38:35,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:38:35,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:35,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:38:35,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:38:35,351 INFO L87 Difference]: Start difference. First operand 163 states and 311 transitions. Second operand 17 states. [2020-07-20 21:38:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:35,901 INFO L93 Difference]: Finished difference Result 215 states and 436 transitions. [2020-07-20 21:38:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:38:35,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 516 [2020-07-20 21:38:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:35,908 INFO L225 Difference]: With dead ends: 215 [2020-07-20 21:38:35,908 INFO L226 Difference]: Without dead ends: 206 [2020-07-20 21:38:35,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1037 GetRequests, 1003 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:38:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-20 21:38:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 161. [2020-07-20 21:38:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-20 21:38:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 302 transitions. [2020-07-20 21:38:35,936 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 302 transitions. Word has length 516 [2020-07-20 21:38:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:35,937 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 302 transitions. [2020-07-20 21:38:35,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:38:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 302 transitions. [2020-07-20 21:38:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-07-20 21:38:35,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:35,943 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 26, 26, 23, 22, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 10, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:36,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:36,158 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:36,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1948639640, now seen corresponding path program 18 times [2020-07-20 21:38:36,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:36,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746603146] [2020-07-20 21:38:36,159 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:36,708 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:36,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:36,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:38:36,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4084 backedges. 357 proven. 317 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2020-07-20 21:38:36,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:38,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:38,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:38,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:38,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:38,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4084 backedges. 357 proven. 329 refuted. 0 times theorem prover too weak. 3398 trivial. 0 not checked. [2020-07-20 21:38:39,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746603146] [2020-07-20 21:38:39,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:39,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:38:39,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698991345] [2020-07-20 21:38:39,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:38:39,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:38:39,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:38:39,896 INFO L87 Difference]: Start difference. First operand 161 states and 302 transitions. Second operand 15 states. [2020-07-20 21:38:40,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:40,463 INFO L93 Difference]: Finished difference Result 292 states and 718 transitions. [2020-07-20 21:38:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:38:40,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 382 [2020-07-20 21:38:40,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:40,471 INFO L225 Difference]: With dead ends: 292 [2020-07-20 21:38:40,471 INFO L226 Difference]: Without dead ends: 283 [2020-07-20 21:38:40,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 739 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:38:40,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-20 21:38:40,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 163. [2020-07-20 21:38:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-20 21:38:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 311 transitions. [2020-07-20 21:38:40,505 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 311 transitions. Word has length 382 [2020-07-20 21:38:40,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:40,506 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 311 transitions. [2020-07-20 21:38:40,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:38:40,506 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 311 transitions. [2020-07-20 21:38:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2020-07-20 21:38:40,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:40,513 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 38, 38, 33, 32, 22, 22, 22, 22, 22, 22, 22, 19, 19, 19, 19, 19, 19, 19, 14, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:40,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:40,728 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:40,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:40,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1218597744, now seen corresponding path program 19 times [2020-07-20 21:38:40,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:40,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305777535] [2020-07-20 21:38:40,729 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:41,344 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:41,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:41,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:38:41,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9404 backedges. 596 proven. 864 refuted. 0 times theorem prover too weak. 7944 trivial. 0 not checked. [2020-07-20 21:38:41,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:45,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:46,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:46,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:46,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:46,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:46,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:46,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:46,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:47,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:47,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:47,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:47,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:47,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9404 backedges. 596 proven. 894 refuted. 0 times theorem prover too weak. 7914 trivial. 0 not checked. [2020-07-20 21:38:48,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305777535] [2020-07-20 21:38:48,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:48,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 21:38:48,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257445779] [2020-07-20 21:38:48,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:38:48,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:38:48,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:38:48,003 INFO L87 Difference]: Start difference. First operand 163 states and 311 transitions. Second operand 20 states. [2020-07-20 21:38:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:48,814 INFO L93 Difference]: Finished difference Result 290 states and 704 transitions. [2020-07-20 21:38:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:38:48,816 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 570 [2020-07-20 21:38:48,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:48,821 INFO L225 Difference]: With dead ends: 290 [2020-07-20 21:38:48,822 INFO L226 Difference]: Without dead ends: 272 [2020-07-20 21:38:48,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1107 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:38:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-20 21:38:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 177. [2020-07-20 21:38:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-20 21:38:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 368 transitions. [2020-07-20 21:38:48,856 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 368 transitions. Word has length 570 [2020-07-20 21:38:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:48,856 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 368 transitions. [2020-07-20 21:38:48,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:38:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 368 transitions. [2020-07-20 21:38:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-20 21:38:48,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:48,864 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:49,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:49,078 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:49,079 INFO L82 PathProgramCache]: Analyzing trace with hash -826977718, now seen corresponding path program 20 times [2020-07-20 21:38:49,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:49,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099859693] [2020-07-20 21:38:49,079 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:49,666 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:49,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:49,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:38:49,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 302 proven. 770 refuted. 0 times theorem prover too weak. 4256 trivial. 0 not checked. [2020-07-20 21:38:49,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:53,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:53,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:53,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:53,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 310 proven. 788 refuted. 0 times theorem prover too weak. 4230 trivial. 0 not checked. [2020-07-20 21:38:55,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099859693] [2020-07-20 21:38:55,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:55,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 21:38:55,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290483854] [2020-07-20 21:38:55,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:38:55,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:55,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:38:55,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:38:55,481 INFO L87 Difference]: Start difference. First operand 177 states and 368 transitions. Second operand 20 states. [2020-07-20 21:38:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:56,201 INFO L93 Difference]: Finished difference Result 316 states and 778 transitions. [2020-07-20 21:38:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:38:56,203 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 434 [2020-07-20 21:38:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:56,209 INFO L225 Difference]: With dead ends: 316 [2020-07-20 21:38:56,209 INFO L226 Difference]: Without dead ends: 242 [2020-07-20 21:38:56,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 835 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:38:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-20 21:38:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 183. [2020-07-20 21:38:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-20 21:38:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 370 transitions. [2020-07-20 21:38:56,242 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 370 transitions. Word has length 434 [2020-07-20 21:38:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:56,243 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 370 transitions. [2020-07-20 21:38:56,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:38:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 370 transitions. [2020-07-20 21:38:56,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-20 21:38:56,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:56,250 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 28, 28, 24, 23, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 10, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:56,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:56,464 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1227788955, now seen corresponding path program 21 times [2020-07-20 21:38:56,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:56,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541118065] [2020-07-20 21:38:56,466 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:57,064 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:57,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:57,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:38:57,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 571 proven. 464 refuted. 0 times theorem prover too weak. 3962 trivial. 0 not checked. [2020-07-20 21:38:57,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:00,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:00,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:01,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:01,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:01,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:02,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:02,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:02,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:02,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:02,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:02,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:02,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:02,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 571 proven. 490 refuted. 0 times theorem prover too weak. 3936 trivial. 0 not checked. [2020-07-20 21:39:03,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541118065] [2020-07-20 21:39:03,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:03,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:39:03,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830109813] [2020-07-20 21:39:03,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:03,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:03,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:03,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:03,185 INFO L87 Difference]: Start difference. First operand 183 states and 370 transitions. Second operand 19 states. [2020-07-20 21:39:03,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:03,905 INFO L93 Difference]: Finished difference Result 247 states and 548 transitions. [2020-07-20 21:39:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:03,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 420 [2020-07-20 21:39:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:03,912 INFO L225 Difference]: With dead ends: 247 [2020-07-20 21:39:03,913 INFO L226 Difference]: Without dead ends: 229 [2020-07-20 21:39:03,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 807 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:39:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-20 21:39:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 166. [2020-07-20 21:39:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-20 21:39:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 327 transitions. [2020-07-20 21:39:03,940 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 327 transitions. Word has length 420 [2020-07-20 21:39:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:03,940 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 327 transitions. [2020-07-20 21:39:03,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 327 transitions. [2020-07-20 21:39:03,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-20 21:39:03,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:03,946 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 11, 10, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:04,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:04,160 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:04,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1146810837, now seen corresponding path program 22 times [2020-07-20 21:39:04,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:04,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738982156] [2020-07-20 21:39:04,161 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:04,786 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:04,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:04,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:39:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 241 proven. 871 refuted. 0 times theorem prover too weak. 4632 trivial. 0 not checked. [2020-07-20 21:39:05,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:08,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:08,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:09,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:09,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:10,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:10,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:10,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:10,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:10,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:10,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:10,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:10,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 249 proven. 887 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2020-07-20 21:39:11,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738982156] [2020-07-20 21:39:11,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:11,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:39:11,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66115814] [2020-07-20 21:39:11,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:11,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:11,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:11,003 INFO L87 Difference]: Start difference. First operand 166 states and 327 transitions. Second operand 19 states. [2020-07-20 21:39:11,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:11,933 INFO L93 Difference]: Finished difference Result 327 states and 827 transitions. [2020-07-20 21:39:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:11,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-20 21:39:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:11,940 INFO L225 Difference]: With dead ends: 327 [2020-07-20 21:39:11,941 INFO L226 Difference]: Without dead ends: 200 [2020-07-20 21:39:11,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 867 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:39:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-20 21:39:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 157. [2020-07-20 21:39:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-20 21:39:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 305 transitions. [2020-07-20 21:39:11,969 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 305 transitions. Word has length 450 [2020-07-20 21:39:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:11,969 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 305 transitions. [2020-07-20 21:39:11,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 305 transitions. [2020-07-20 21:39:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2020-07-20 21:39:11,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:11,977 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 38, 38, 31, 30, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 12, 10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:12,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:12,191 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:12,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1260162642, now seen corresponding path program 23 times [2020-07-20 21:39:12,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:12,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153023809] [2020-07-20 21:39:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:12,871 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:12,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:12,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:39:12,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8436 backedges. 453 proven. 702 refuted. 0 times theorem prover too weak. 7281 trivial. 0 not checked. [2020-07-20 21:39:13,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:16,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:16,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:17,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:17,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:17,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:17,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:17,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:17,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:17,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:17,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:18,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8436 backedges. 453 proven. 718 refuted. 0 times theorem prover too weak. 7265 trivial. 0 not checked. [2020-07-20 21:39:18,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153023809] [2020-07-20 21:39:18,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:18,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:39:18,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518960251] [2020-07-20 21:39:18,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:39:18,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:18,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:39:18,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:39:18,687 INFO L87 Difference]: Start difference. First operand 157 states and 305 transitions. Second operand 17 states. [2020-07-20 21:39:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:19,219 INFO L93 Difference]: Finished difference Result 217 states and 465 transitions. [2020-07-20 21:39:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:39:19,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 542 [2020-07-20 21:39:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:19,226 INFO L225 Difference]: With dead ends: 217 [2020-07-20 21:39:19,226 INFO L226 Difference]: Without dead ends: 208 [2020-07-20 21:39:19,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1089 GetRequests, 1055 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:39:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-20 21:39:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 152. [2020-07-20 21:39:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-20 21:39:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 287 transitions. [2020-07-20 21:39:19,250 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 287 transitions. Word has length 542 [2020-07-20 21:39:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:19,251 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 287 transitions. [2020-07-20 21:39:19,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:39:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 287 transitions. [2020-07-20 21:39:19,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-07-20 21:39:19,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:19,256 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 26, 26, 22, 22, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 9, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:19,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:19,464 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:19,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:19,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1946192314, now seen corresponding path program 24 times [2020-07-20 21:39:19,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:19,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782236717] [2020-07-20 21:39:19,466 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:20,183 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:20,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:20,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:39:20,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4062 backedges. 383 proven. 290 refuted. 0 times theorem prover too weak. 3389 trivial. 0 not checked. [2020-07-20 21:39:20,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:21,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:21,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:22,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:22,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:22,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:22,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:22,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:22,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:22,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:22,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4062 backedges. 385 proven. 298 refuted. 0 times theorem prover too weak. 3379 trivial. 0 not checked. [2020-07-20 21:39:23,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782236717] [2020-07-20 21:39:23,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:23,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:39:23,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489109360] [2020-07-20 21:39:23,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:39:23,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:23,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:39:23,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:39:23,010 INFO L87 Difference]: Start difference. First operand 152 states and 287 transitions. Second operand 15 states. [2020-07-20 21:39:23,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:23,312 INFO L93 Difference]: Finished difference Result 246 states and 553 transitions. [2020-07-20 21:39:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:39:23,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 381 [2020-07-20 21:39:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:23,317 INFO L225 Difference]: With dead ends: 246 [2020-07-20 21:39:23,318 INFO L226 Difference]: Without dead ends: 237 [2020-07-20 21:39:23,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 737 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:39:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-20 21:39:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 165. [2020-07-20 21:39:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-07-20 21:39:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 337 transitions. [2020-07-20 21:39:23,341 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 337 transitions. Word has length 381 [2020-07-20 21:39:23,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:23,341 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 337 transitions. [2020-07-20 21:39:23,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:39:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 337 transitions. [2020-07-20 21:39:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-20 21:39:23,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:23,347 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 27, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 9, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:23,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:23,561 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:23,562 INFO L82 PathProgramCache]: Analyzing trace with hash 769385772, now seen corresponding path program 25 times [2020-07-20 21:39:23,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:23,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813271215] [2020-07-20 21:39:23,562 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 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:24,228 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:24,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:24,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:39:24,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5371 backedges. 487 proven. 426 refuted. 0 times theorem prover too weak. 4458 trivial. 0 not checked. [2020-07-20 21:39:24,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:26,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:26,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:26,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:26,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:26,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:26,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:26,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:26,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:26,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:27,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:27,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5371 backedges. 491 proven. 436 refuted. 0 times theorem prover too weak. 4444 trivial. 0 not checked. [2020-07-20 21:39:27,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813271215] [2020-07-20 21:39:27,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:27,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:39:27,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021012828] [2020-07-20 21:39:27,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:39:27,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:27,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:39:27,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:39:27,626 INFO L87 Difference]: Start difference. First operand 165 states and 337 transitions. Second operand 17 states. [2020-07-20 21:39:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:27,938 INFO L93 Difference]: Finished difference Result 204 states and 422 transitions. [2020-07-20 21:39:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:39:27,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 436 [2020-07-20 21:39:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:27,943 INFO L225 Difference]: With dead ends: 204 [2020-07-20 21:39:27,943 INFO L226 Difference]: Without dead ends: 195 [2020-07-20 21:39:27,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 843 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:39:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-20 21:39:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 152. [2020-07-20 21:39:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-20 21:39:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 290 transitions. [2020-07-20 21:39:27,960 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 290 transitions. Word has length 436 [2020-07-20 21:39:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:27,960 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 290 transitions. [2020-07-20 21:39:27,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:39:27,961 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 290 transitions. [2020-07-20 21:39:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-20 21:39:27,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:27,965 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 24, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:28,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:28,181 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:28,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1701998100, now seen corresponding path program 26 times [2020-07-20 21:39:28,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:28,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245316859] [2020-07-20 21:39:28,182 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:28,822 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:28,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:28,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:39:28,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4655 backedges. 386 proven. 312 refuted. 0 times theorem prover too weak. 3957 trivial. 0 not checked. [2020-07-20 21:39:28,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:30,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4655 backedges. 386 proven. 322 refuted. 0 times theorem prover too weak. 3947 trivial. 0 not checked. [2020-07-20 21:39:31,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245316859] [2020-07-20 21:39:31,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:31,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:39:31,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129706804] [2020-07-20 21:39:31,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:39:31,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:31,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:39:31,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:39:31,427 INFO L87 Difference]: Start difference. First operand 152 states and 290 transitions. Second operand 15 states. [2020-07-20 21:39:31,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:31,672 INFO L93 Difference]: Finished difference Result 193 states and 384 transitions. [2020-07-20 21:39:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:39:31,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 407 [2020-07-20 21:39:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:31,676 INFO L225 Difference]: With dead ends: 193 [2020-07-20 21:39:31,676 INFO L226 Difference]: Without dead ends: 184 [2020-07-20 21:39:31,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 789 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:39:31,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-20 21:39:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 149. [2020-07-20 21:39:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-20 21:39:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 281 transitions. [2020-07-20 21:39:31,690 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 281 transitions. Word has length 407 [2020-07-20 21:39:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:31,690 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 281 transitions. [2020-07-20 21:39:31,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:39:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 281 transitions. [2020-07-20 21:39:31,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-20 21:39:31,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:31,695 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:31,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:31,909 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:31,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:31,910 INFO L82 PathProgramCache]: Analyzing trace with hash -620759121, now seen corresponding path program 27 times [2020-07-20 21:39:31,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:31,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978776284] [2020-07-20 21:39:31,911 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:32,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:32,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:32,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:39:32,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 626 proven. 411 refuted. 0 times theorem prover too weak. 3979 trivial. 0 not checked. [2020-07-20 21:39:32,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:34,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:35,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:35,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:35,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:35,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:35,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:35,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:35,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:35,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:36,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:36,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 628 proven. 433 refuted. 0 times theorem prover too weak. 3955 trivial. 0 not checked. [2020-07-20 21:39:36,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978776284] [2020-07-20 21:39:36,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:36,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:39:36,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494935794] [2020-07-20 21:39:36,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:36,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:36,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:36,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:36,693 INFO L87 Difference]: Start difference. First operand 149 states and 281 transitions. Second operand 19 states. [2020-07-20 21:39:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:37,164 INFO L93 Difference]: Finished difference Result 186 states and 357 transitions. [2020-07-20 21:39:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:37,165 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 422 [2020-07-20 21:39:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:37,169 INFO L225 Difference]: With dead ends: 186 [2020-07-20 21:39:37,169 INFO L226 Difference]: Without dead ends: 168 [2020-07-20 21:39:37,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 811 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:39:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-20 21:39:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 159. [2020-07-20 21:39:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-20 21:39:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 311 transitions. [2020-07-20 21:39:37,186 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 311 transitions. Word has length 422 [2020-07-20 21:39:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:37,186 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 311 transitions. [2020-07-20 21:39:37,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 311 transitions. [2020-07-20 21:39:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-20 21:39:37,191 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:37,191 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 23, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:37,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:37,406 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:37,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:37,407 INFO L82 PathProgramCache]: Analyzing trace with hash 634662915, now seen corresponding path program 28 times [2020-07-20 21:39:37,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:37,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160604446] [2020-07-20 21:39:37,407 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:38,085 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:39:38,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:38,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:39:38,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 655 proven. 176 refuted. 0 times theorem prover too weak. 3539 trivial. 0 not checked. [2020-07-20 21:39:38,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:39,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:39,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:39,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:40,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:40,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:40,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:40,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:40,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 659 proven. 188 refuted. 0 times theorem prover too weak. 3523 trivial. 0 not checked. [2020-07-20 21:39:41,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160604446] [2020-07-20 21:39:41,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:41,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:39:41,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563935221] [2020-07-20 21:39:41,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:39:41,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:41,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:39:41,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:39:41,149 INFO L87 Difference]: Start difference. First operand 159 states and 311 transitions. Second operand 17 states. [2020-07-20 21:39:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:41,491 INFO L93 Difference]: Finished difference Result 246 states and 589 transitions. [2020-07-20 21:39:41,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:39:41,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 395 [2020-07-20 21:39:41,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:41,497 INFO L225 Difference]: With dead ends: 246 [2020-07-20 21:39:41,497 INFO L226 Difference]: Without dead ends: 231 [2020-07-20 21:39:41,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 761 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:39:41,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-07-20 21:39:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 197. [2020-07-20 21:39:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-07-20 21:39:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 435 transitions. [2020-07-20 21:39:41,517 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 435 transitions. Word has length 395 [2020-07-20 21:39:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:41,518 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 435 transitions. [2020-07-20 21:39:41,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:39:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 435 transitions. [2020-07-20 21:39:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 21:39:41,525 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:41,525 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 30, 30, 25, 24, 20, 20, 20, 20, 20, 20, 20, 16, 15, 15, 15, 15, 15, 15, 15, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:41,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:41,740 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1349532802, now seen corresponding path program 29 times [2020-07-20 21:39:41,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:41,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133603741] [2020-07-20 21:39:41,741 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:42,516 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:42,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:42,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:39:42,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6776 backedges. 558 proven. 536 refuted. 0 times theorem prover too weak. 5682 trivial. 0 not checked. [2020-07-20 21:39:42,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:44,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:45,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:45,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:45,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:45,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:45,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:45,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:45,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:46,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6776 backedges. 556 proven. 554 refuted. 0 times theorem prover too weak. 5666 trivial. 0 not checked. [2020-07-20 21:39:46,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133603741] [2020-07-20 21:39:46,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:46,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:39:46,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636760799] [2020-07-20 21:39:46,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:46,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:46,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:46,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:46,614 INFO L87 Difference]: Start difference. First operand 197 states and 435 transitions. Second operand 19 states. [2020-07-20 21:39:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:47,279 INFO L93 Difference]: Finished difference Result 292 states and 756 transitions. [2020-07-20 21:39:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:47,281 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 482 [2020-07-20 21:39:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:47,290 INFO L225 Difference]: With dead ends: 292 [2020-07-20 21:39:47,290 INFO L226 Difference]: Without dead ends: 274 [2020-07-20 21:39:47,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 933 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:39:47,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-20 21:39:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 212. [2020-07-20 21:39:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-20 21:39:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 478 transitions. [2020-07-20 21:39:47,316 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 478 transitions. Word has length 482 [2020-07-20 21:39:47,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:47,316 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 478 transitions. [2020-07-20 21:39:47,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:47,317 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 478 transitions. [2020-07-20 21:39:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2020-07-20 21:39:47,322 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:47,323 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 36, 33, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 16, 12, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:47,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:47,524 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:47,525 INFO L82 PathProgramCache]: Analyzing trace with hash 270039344, now seen corresponding path program 30 times [2020-07-20 21:39:47,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:47,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898950153] [2020-07-20 21:39:47,526 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:48,333 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:48,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:39:48,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9482 backedges. 360 proven. 904 refuted. 0 times theorem prover too weak. 8218 trivial. 0 not checked. [2020-07-20 21:39:48,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:51,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:51,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:51,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:51,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:51,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:51,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9482 backedges. 366 proven. 916 refuted. 0 times theorem prover too weak. 8200 trivial. 0 not checked. [2020-07-20 21:39:52,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898950153] [2020-07-20 21:39:52,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:52,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:39:52,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428306075] [2020-07-20 21:39:52,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:39:52,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:52,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:39:52,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:39:52,479 INFO L87 Difference]: Start difference. First operand 212 states and 478 transitions. Second operand 17 states. [2020-07-20 21:39:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:52,810 INFO L93 Difference]: Finished difference Result 273 states and 626 transitions. [2020-07-20 21:39:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:39:52,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 574 [2020-07-20 21:39:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:52,815 INFO L225 Difference]: With dead ends: 273 [2020-07-20 21:39:52,815 INFO L226 Difference]: Without dead ends: 248 [2020-07-20 21:39:52,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1153 GetRequests, 1119 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:39:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-07-20 21:39:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 215. [2020-07-20 21:39:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-20 21:39:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 493 transitions. [2020-07-20 21:39:52,834 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 493 transitions. Word has length 574 [2020-07-20 21:39:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:52,834 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 493 transitions. [2020-07-20 21:39:52,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:39:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 493 transitions. [2020-07-20 21:39:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 21:39:52,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:52,841 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 26, 26, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:53,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:53,042 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:53,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1325679408, now seen corresponding path program 31 times [2020-07-20 21:39:53,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:53,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894155044] [2020-07-20 21:39:53,044 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:53,836 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:53,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:53,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:39:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6714 backedges. 827 proven. 370 refuted. 0 times theorem prover too weak. 5517 trivial. 0 not checked. [2020-07-20 21:39:54,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:55,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:55,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:57,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:57,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:57,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:57,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:57,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:57,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:57,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6714 backedges. 831 proven. 387 refuted. 0 times theorem prover too weak. 5496 trivial. 0 not checked. [2020-07-20 21:39:58,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894155044] [2020-07-20 21:39:58,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:58,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:39:58,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531219630] [2020-07-20 21:39:58,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:58,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:58,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:58,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:58,478 INFO L87 Difference]: Start difference. First operand 215 states and 493 transitions. Second operand 19 states. [2020-07-20 21:39:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:58,900 INFO L93 Difference]: Finished difference Result 279 states and 714 transitions. [2020-07-20 21:39:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:58,901 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 485 [2020-07-20 21:39:58,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:58,906 INFO L225 Difference]: With dead ends: 279 [2020-07-20 21:39:58,906 INFO L226 Difference]: Without dead ends: 264 [2020-07-20 21:39:58,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 937 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:39:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-20 21:39:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 217. [2020-07-20 21:39:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-07-20 21:39:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 480 transitions. [2020-07-20 21:39:58,935 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 480 transitions. Word has length 485 [2020-07-20 21:39:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:58,936 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 480 transitions. [2020-07-20 21:39:58,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 480 transitions. [2020-07-20 21:39:58,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-07-20 21:39:58,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:58,943 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 24, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:59,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:59,157 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:59,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2146284153, now seen corresponding path program 32 times [2020-07-20 21:39:59,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:59,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294991285] [2020-07-20 21:39:59,159 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:59,964 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:39:59,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:39:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4992 backedges. 665 proven. 207 refuted. 0 times theorem prover too weak. 4120 trivial. 0 not checked. [2020-07-20 21:40:00,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:01,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:01,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:01,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:02,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:02,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:02,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:02,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:02,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4992 backedges. 667 proven. 221 refuted. 0 times theorem prover too weak. 4104 trivial. 0 not checked. [2020-07-20 21:40:03,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294991285] [2020-07-20 21:40:03,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:03,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:40:03,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429124523] [2020-07-20 21:40:03,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:40:03,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:03,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:40:03,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:40:03,517 INFO L87 Difference]: Start difference. First operand 217 states and 480 transitions. Second operand 17 states. [2020-07-20 21:40:03,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:03,865 INFO L93 Difference]: Finished difference Result 331 states and 866 transitions. [2020-07-20 21:40:03,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:40:03,866 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 421 [2020-07-20 21:40:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:03,871 INFO L225 Difference]: With dead ends: 331 [2020-07-20 21:40:03,872 INFO L226 Difference]: Without dead ends: 316 [2020-07-20 21:40:03,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 813 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:40:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-07-20 21:40:03,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 209. [2020-07-20 21:40:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-07-20 21:40:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 447 transitions. [2020-07-20 21:40:03,900 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 447 transitions. Word has length 421 [2020-07-20 21:40:03,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:03,900 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 447 transitions. [2020-07-20 21:40:03,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:40:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 447 transitions. [2020-07-20 21:40:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 21:40:03,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:03,906 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 28, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:04,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:04,110 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:04,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:04,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2118284952, now seen corresponding path program 33 times [2020-07-20 21:40:04,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:04,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054836832] [2020-07-20 21:40:04,112 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:04,858 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:40:04,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:04,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:40:04,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 606 proven. 281 refuted. 0 times theorem prover too weak. 5933 trivial. 0 not checked. [2020-07-20 21:40:05,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:06,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:06,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:06,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:06,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 608 proven. 289 refuted. 0 times theorem prover too weak. 5923 trivial. 0 not checked. [2020-07-20 21:40:08,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054836832] [2020-07-20 21:40:08,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:08,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:40:08,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147620758] [2020-07-20 21:40:08,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:40:08,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:08,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:40:08,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:40:08,189 INFO L87 Difference]: Start difference. First operand 209 states and 447 transitions. Second operand 15 states. [2020-07-20 21:40:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:08,481 INFO L93 Difference]: Finished difference Result 362 states and 1036 transitions. [2020-07-20 21:40:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:40:08,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 489 [2020-07-20 21:40:08,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:08,489 INFO L225 Difference]: With dead ends: 362 [2020-07-20 21:40:08,489 INFO L226 Difference]: Without dead ends: 347 [2020-07-20 21:40:08,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 953 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:40:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-07-20 21:40:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 211. [2020-07-20 21:40:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-07-20 21:40:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 460 transitions. [2020-07-20 21:40:08,524 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 460 transitions. Word has length 489 [2020-07-20 21:40:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:08,524 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 460 transitions. [2020-07-20 21:40:08,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:40:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 460 transitions. [2020-07-20 21:40:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2020-07-20 21:40:08,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:08,532 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 29, 29, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:08,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:08,747 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:08,748 INFO L82 PathProgramCache]: Analyzing trace with hash 572899692, now seen corresponding path program 34 times [2020-07-20 21:40:08,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:08,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516847737] [2020-07-20 21:40:08,749 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:09,512 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:40:09,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:09,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:40:09,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7584 backedges. 907 proven. 390 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2020-07-20 21:40:09,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:11,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:11,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7584 backedges. 909 proven. 412 refuted. 0 times theorem prover too weak. 6263 trivial. 0 not checked. [2020-07-20 21:40:14,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516847737] [2020-07-20 21:40:14,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:14,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:40:14,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650860992] [2020-07-20 21:40:14,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:40:14,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:40:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:40:14,831 INFO L87 Difference]: Start difference. First operand 211 states and 460 transitions. Second operand 19 states. [2020-07-20 21:40:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:15,529 INFO L93 Difference]: Finished difference Result 281 states and 609 transitions. [2020-07-20 21:40:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:40:15,530 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 515 [2020-07-20 21:40:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:15,536 INFO L225 Difference]: With dead ends: 281 [2020-07-20 21:40:15,536 INFO L226 Difference]: Without dead ends: 266 [2020-07-20 21:40:15,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 997 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:40:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-20 21:40:15,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 231. [2020-07-20 21:40:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-20 21:40:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 493 transitions. [2020-07-20 21:40:15,561 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 493 transitions. Word has length 515 [2020-07-20 21:40:15,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:15,562 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 493 transitions. [2020-07-20 21:40:15,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:40:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 493 transitions. [2020-07-20 21:40:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-07-20 21:40:15,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:15,569 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 24, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 9, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:15,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:15,784 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash 137656404, now seen corresponding path program 35 times [2020-07-20 21:40:15,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:15,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359072598] [2020-07-20 21:40:15,786 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:16,541 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:40:16,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:40:16,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 370 proven. 603 refuted. 0 times theorem prover too weak. 4331 trivial. 0 not checked. [2020-07-20 21:40:16,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:19,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:19,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:21,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:21,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:21,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:21,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:21,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:21,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:22,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:22,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 372 proven. 615 refuted. 0 times theorem prover too weak. 4317 trivial. 0 not checked. [2020-07-20 21:40:22,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359072598] [2020-07-20 21:40:22,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:22,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:40:22,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525189790] [2020-07-20 21:40:22,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:40:22,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:22,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:40:22,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:40:22,793 INFO L87 Difference]: Start difference. First operand 231 states and 493 transitions. Second operand 19 states. [2020-07-20 21:40:23,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:23,556 INFO L93 Difference]: Finished difference Result 271 states and 543 transitions. [2020-07-20 21:40:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:40:23,559 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 433 [2020-07-20 21:40:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:23,565 INFO L225 Difference]: With dead ends: 271 [2020-07-20 21:40:23,565 INFO L226 Difference]: Without dead ends: 246 [2020-07-20 21:40:23,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 835 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:40:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-20 21:40:23,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 219. [2020-07-20 21:40:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-07-20 21:40:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 458 transitions. [2020-07-20 21:40:23,588 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 458 transitions. Word has length 433 [2020-07-20 21:40:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:23,588 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 458 transitions. [2020-07-20 21:40:23,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:40:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 458 transitions. [2020-07-20 21:40:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-20 21:40:23,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:23,593 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:23,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:23,794 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:23,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:23,795 INFO L82 PathProgramCache]: Analyzing trace with hash -884254139, now seen corresponding path program 36 times [2020-07-20 21:40:23,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:23,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965795448] [2020-07-20 21:40:23,797 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:24,573 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:24,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:40:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5706 backedges. 702 proven. 238 refuted. 0 times theorem prover too weak. 4766 trivial. 0 not checked. [2020-07-20 21:40:24,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:27,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:27,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:27,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:28,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:28,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:28,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:28,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:28,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:28,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:29,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5706 backedges. 706 proven. 248 refuted. 0 times theorem prover too weak. 4752 trivial. 0 not checked. [2020-07-20 21:40:30,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965795448] [2020-07-20 21:40:30,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:30,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:40:30,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244685935] [2020-07-20 21:40:30,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:40:30,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:30,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:40:30,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:40:30,579 INFO L87 Difference]: Start difference. First operand 219 states and 458 transitions. Second operand 17 states. [2020-07-20 21:40:31,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:31,246 INFO L93 Difference]: Finished difference Result 315 states and 693 transitions. [2020-07-20 21:40:31,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:40:31,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 449 [2020-07-20 21:40:31,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:31,255 INFO L225 Difference]: With dead ends: 315 [2020-07-20 21:40:31,255 INFO L226 Difference]: Without dead ends: 300 [2020-07-20 21:40:31,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 869 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:40:31,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-07-20 21:40:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 212. [2020-07-20 21:40:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-20 21:40:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 423 transitions. [2020-07-20 21:40:31,277 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 423 transitions. Word has length 449 [2020-07-20 21:40:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:31,278 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 423 transitions. [2020-07-20 21:40:31,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:40:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 423 transitions. [2020-07-20 21:40:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-20 21:40:31,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:31,282 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 9, 9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:31,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:31,483 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:31,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:31,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1541651298, now seen corresponding path program 37 times [2020-07-20 21:40:31,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:31,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104203825] [2020-07-20 21:40:31,485 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:32,364 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:32,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:40:32,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 621 proven. 154 refuted. 0 times theorem prover too weak. 4553 trivial. 0 not checked. [2020-07-20 21:40:32,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:34,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:34,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:34,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:34,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:35,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:35,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:35,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:35,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:35,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 621 proven. 166 refuted. 0 times theorem prover too weak. 4541 trivial. 0 not checked. [2020-07-20 21:40:37,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104203825] [2020-07-20 21:40:37,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:37,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:40:37,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429115424] [2020-07-20 21:40:37,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:40:37,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:37,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:40:37,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:40:37,433 INFO L87 Difference]: Start difference. First operand 212 states and 423 transitions. Second operand 15 states. [2020-07-20 21:40:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:37,838 INFO L93 Difference]: Finished difference Result 338 states and 804 transitions. [2020-07-20 21:40:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:40:37,840 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 434 [2020-07-20 21:40:37,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:37,846 INFO L225 Difference]: With dead ends: 338 [2020-07-20 21:40:37,846 INFO L226 Difference]: Without dead ends: 323 [2020-07-20 21:40:37,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 843 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:40:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-07-20 21:40:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 225. [2020-07-20 21:40:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-20 21:40:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 481 transitions. [2020-07-20 21:40:37,869 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 481 transitions. Word has length 434 [2020-07-20 21:40:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:37,869 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 481 transitions. [2020-07-20 21:40:37,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:40:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 481 transitions. [2020-07-20 21:40:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-07-20 21:40:37,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:37,875 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 25, 24, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:38,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:38,090 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:38,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1374396903, now seen corresponding path program 38 times [2020-07-20 21:40:38,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:38,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362125619] [2020-07-20 21:40:38,090 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:38,860 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:38,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:38,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:40:38,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 751 proven. 179 refuted. 0 times theorem prover too weak. 4702 trivial. 0 not checked. [2020-07-20 21:40:39,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:40,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:40,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:41,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:41,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:41,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:41,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:41,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:41,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:41,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:41,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:42,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 755 proven. 191 refuted. 0 times theorem prover too weak. 4686 trivial. 0 not checked. [2020-07-20 21:40:43,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362125619] [2020-07-20 21:40:43,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:43,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:40:43,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194156899] [2020-07-20 21:40:43,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:40:43,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:43,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:40:43,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:40:43,206 INFO L87 Difference]: Start difference. First operand 225 states and 481 transitions. Second operand 17 states. [2020-07-20 21:40:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:43,583 INFO L93 Difference]: Finished difference Result 264 states and 561 transitions. [2020-07-20 21:40:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:40:43,585 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 446 [2020-07-20 21:40:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:43,589 INFO L225 Difference]: With dead ends: 264 [2020-07-20 21:40:43,589 INFO L226 Difference]: Without dead ends: 249 [2020-07-20 21:40:43,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 863 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:40:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-20 21:40:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2020-07-20 21:40:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-20 21:40:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 405 transitions. [2020-07-20 21:40:43,608 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 405 transitions. Word has length 446 [2020-07-20 21:40:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:43,608 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 405 transitions. [2020-07-20 21:40:43,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:40:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 405 transitions. [2020-07-20 21:40:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-20 21:40:43,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:43,611 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:43,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:43,812 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash -949923861, now seen corresponding path program 39 times [2020-07-20 21:40:43,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:43,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766870794] [2020-07-20 21:40:43,814 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:44,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:44,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:40:44,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 686 proven. 116 refuted. 0 times theorem prover too weak. 4879 trivial. 0 not checked. [2020-07-20 21:40:44,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:45,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:46,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:46,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:46,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:46,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:46,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:46,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:47,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 690 proven. 122 refuted. 0 times theorem prover too weak. 4869 trivial. 0 not checked. [2020-07-20 21:40:47,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766870794] [2020-07-20 21:40:47,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:47,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:40:47,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137198398] [2020-07-20 21:40:47,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:40:47,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:47,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:40:47,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:40:47,950 INFO L87 Difference]: Start difference. First operand 207 states and 405 transitions. Second operand 15 states. [2020-07-20 21:40:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:48,279 INFO L93 Difference]: Finished difference Result 285 states and 656 transitions. [2020-07-20 21:40:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:40:48,281 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 448 [2020-07-20 21:40:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:48,285 INFO L225 Difference]: With dead ends: 285 [2020-07-20 21:40:48,285 INFO L226 Difference]: Without dead ends: 272 [2020-07-20 21:40:48,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 871 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:40:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-20 21:40:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 225. [2020-07-20 21:40:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-20 21:40:48,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 485 transitions. [2020-07-20 21:40:48,313 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 485 transitions. Word has length 448 [2020-07-20 21:40:48,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:48,314 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 485 transitions. [2020-07-20 21:40:48,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:40:48,314 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 485 transitions. [2020-07-20 21:40:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 21:40:48,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:48,320 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 29, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:48,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:48,534 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:48,534 INFO L82 PathProgramCache]: Analyzing trace with hash -228909220, now seen corresponding path program 40 times [2020-07-20 21:40:48,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:48,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595059002] [2020-07-20 21:40:48,534 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:49,389 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:40:49,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:49,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:40:49,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 322 proven. 960 refuted. 0 times theorem prover too weak. 5531 trivial. 0 not checked. [2020-07-20 21:40:49,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:52,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:52,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:53,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:54,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:54,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:54,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:54,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:54,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:54,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:54,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 321 proven. 982 refuted. 0 times theorem prover too weak. 5510 trivial. 0 not checked. [2020-07-20 21:40:55,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595059002] [2020-07-20 21:40:55,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:55,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 21:40:55,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410019912] [2020-07-20 21:40:55,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:40:55,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:55,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:40:55,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:40:55,004 INFO L87 Difference]: Start difference. First operand 225 states and 485 transitions. Second operand 21 states. [2020-07-20 21:40:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:55,570 INFO L93 Difference]: Finished difference Result 302 states and 665 transitions. [2020-07-20 21:40:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:40:55,571 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 489 [2020-07-20 21:40:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:55,575 INFO L225 Difference]: With dead ends: 302 [2020-07-20 21:40:55,576 INFO L226 Difference]: Without dead ends: 236 [2020-07-20 21:40:55,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 943 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:40:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-20 21:40:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2020-07-20 21:40:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-20 21:40:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 488 transitions. [2020-07-20 21:40:55,597 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 488 transitions. Word has length 489 [2020-07-20 21:40:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:55,597 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 488 transitions. [2020-07-20 21:40:55,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:40:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 488 transitions. [2020-07-20 21:40:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 21:40:55,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:55,602 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 29, 28, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 12, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:55,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:55,803 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:55,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1380050947, now seen corresponding path program 41 times [2020-07-20 21:40:55,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:55,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563980442] [2020-07-20 21:40:55,805 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 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:56,658 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:40:56,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:56,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:40:56,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7204 backedges. 276 proven. 1044 refuted. 0 times theorem prover too weak. 5884 trivial. 0 not checked. [2020-07-20 21:40:56,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:41:00,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:00,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:01,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:01,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:01,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:01,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:02,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:02,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:02,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:02,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7204 backedges. 277 proven. 1064 refuted. 0 times theorem prover too weak. 5863 trivial. 0 not checked. [2020-07-20 21:41:02,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563980442] [2020-07-20 21:41:02,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:41:02,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 21:41:02,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726030699] [2020-07-20 21:41:02,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:41:02,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:41:02,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:41:02,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:41:02,468 INFO L87 Difference]: Start difference. First operand 236 states and 488 transitions. Second operand 21 states. [2020-07-20 21:41:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:41:03,056 INFO L93 Difference]: Finished difference Result 446 states and 972 transitions. [2020-07-20 21:41:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:41:03,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 502 [2020-07-20 21:41:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:41:03,062 INFO L225 Difference]: With dead ends: 446 [2020-07-20 21:41:03,062 INFO L226 Difference]: Without dead ends: 242 [2020-07-20 21:41:03,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 969 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:41:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-20 21:41:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 230. [2020-07-20 21:41:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-07-20 21:41:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 465 transitions. [2020-07-20 21:41:03,087 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 465 transitions. Word has length 502 [2020-07-20 21:41:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:41:03,088 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 465 transitions. [2020-07-20 21:41:03,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:41:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 465 transitions. [2020-07-20 21:41:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 21:41:03,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:41:03,094 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 28, 26, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 12, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:41:03,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:03,309 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:41:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:41:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash 265786322, now seen corresponding path program 42 times [2020-07-20 21:41:03,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:41:03,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948058364] [2020-07-20 21:41:03,311 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 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:04,143 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:41:04,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:41:04,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:41:04,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:41:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6791 backedges. 614 proven. 232 refuted. 0 times theorem prover too weak. 5945 trivial. 0 not checked. [2020-07-20 21:41:04,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:41:05,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:05,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:06,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:06,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:06,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:06,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:06,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:06,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:06,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:06,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6791 backedges. 614 proven. 242 refuted. 0 times theorem prover too weak. 5935 trivial. 0 not checked. [2020-07-20 21:41:07,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948058364] [2020-07-20 21:41:07,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:41:07,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:41:07,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997988969] [2020-07-20 21:41:07,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:41:07,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:41:07,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:41:07,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:41:07,820 INFO L87 Difference]: Start difference. First operand 230 states and 465 transitions. Second operand 15 states. [2020-07-20 21:41:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:41:08,118 INFO L93 Difference]: Finished difference Result 271 states and 556 transitions. [2020-07-20 21:41:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:41:08,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 487 [2020-07-20 21:41:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:41:08,123 INFO L225 Difference]: With dead ends: 271 [2020-07-20 21:41:08,123 INFO L226 Difference]: Without dead ends: 256 [2020-07-20 21:41:08,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 949 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:41:08,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-07-20 21:41:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 221. [2020-07-20 21:41:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-20 21:41:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 448 transitions. [2020-07-20 21:41:08,143 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 448 transitions. Word has length 487 [2020-07-20 21:41:08,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:41:08,143 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 448 transitions. [2020-07-20 21:41:08,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:41:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 448 transitions. [2020-07-20 21:41:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:41:08,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:41:08,149 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:41:08,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:08,364 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:41:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:41:08,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1215569417, now seen corresponding path program 43 times [2020-07-20 21:41:08,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:41:08,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066770357] [2020-07-20 21:41:08,366 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 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:09,187 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:41:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:41:09,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 140 conjunts are in the unsatisfiable core [2020-07-20 21:41:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:41:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 1087 proven. 1161 refuted. 0 times theorem prover too weak. 4166 trivial. 0 not checked. [2020-07-20 21:41:10,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:41:11,385 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:11,496 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:11,618 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:11,732 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:12,256 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:41:12,605 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 21:41:12,841 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 21:41:13,076 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 21:41:13,308 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 21:41:14,240 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:14,352 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:14,470 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:14,586 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:15,063 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 21:41:15,546 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 21:41:16,026 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 21:41:16,557 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 21:41:17,745 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:41:17,880 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:41:18,022 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 21:41:18,166 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 21:41:19,050 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-20 21:41:19,306 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-20 21:41:19,576 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-20 21:41:19,844 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-20 21:41:20,992 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 311 [2020-07-20 21:41:22,145 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 311 [2020-07-20 21:41:23,327 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 313 [2020-07-20 21:41:24,584 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 313 [2020-07-20 21:41:26,032 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:41:26,176 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:41:26,321 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 21:41:26,476 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 21:41:27,409 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-20 21:41:27,694 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-20 21:41:28,002 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-20 21:41:28,264 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-20 21:41:28,544 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-07-20 21:41:28,841 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-07-20 21:41:29,115 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-20 21:41:29,383 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-07-20 21:41:29,645 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-20 21:41:29,899 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-07-20 21:41:30,146 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-07-20 21:41:30,382 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-07-20 21:41:30,610 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-07-20 21:41:30,838 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-20 21:41:31,053 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 21:41:31,270 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-20 21:41:31,478 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-07-20 21:41:31,681 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-20 21:41:31,880 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-20 21:41:32,072 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-20 21:41:32,260 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-07-20 21:41:32,439 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-07-20 21:41:32,607 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-20 21:41:32,774 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-07-20 21:41:32,937 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-20 21:41:33,097 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-07-20 21:41:33,242 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-07-20 21:41:33,381 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-20 21:41:33,518 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-20 21:41:33,651 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 21:41:33,779 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 21:41:33,902 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 21:41:34,018 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-20 21:41:34,126 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 21:41:34,229 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 21:41:34,331 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:41:39,065 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:41:39,286 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:41:39,449 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 21:41:39,607 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 21:41:44,168 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:44,298 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:44,453 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:44,593 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:45,644 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 21:41:45,903 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 21:41:46,148 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 21:41:46,392 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 21:41:47,663 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:47,797 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:47,942 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:48,080 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:48,608 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 21:41:49,144 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 21:41:49,692 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 21:41:50,215 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 21:41:51,620 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:51,763 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:51,903 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:52,044 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:52,195 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-20 21:41:52,330 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 21:41:52,462 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-20 21:41:52,589 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 21:41:52,713 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 21:41:52,835 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-20 21:41:52,952 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-20 21:41:53,062 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:41:53,165 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:41:58,299 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:58,446 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:58,599 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:58,749 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:41:59,886 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 21:42:00,161 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 21:42:00,454 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 21:42:00,739 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 21:42:04,913 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:42:05,062 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:42:05,222 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:42:05,376 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:42:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 1087 proven. 1157 refuted. 0 times theorem prover too weak. 4170 trivial. 0 not checked. [2020-07-20 21:42:08,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066770357] [2020-07-20 21:42:08,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:42:08,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 62 [2020-07-20 21:42:08,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217163998] [2020-07-20 21:42:08,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-20 21:42:08,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:42:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-20 21:42:08,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=3349, Unknown=0, NotChecked=0, Total=3782 [2020-07-20 21:42:08,558 INFO L87 Difference]: Start difference. First operand 221 states and 448 transitions. Second operand 62 states. [2020-07-20 21:42:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:12,383 INFO L93 Difference]: Finished difference Result 976 states and 2479 transitions. [2020-07-20 21:42:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-07-20 21:42:12,385 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 475 [2020-07-20 21:42:12,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:12,427 INFO L225 Difference]: With dead ends: 976 [2020-07-20 21:42:12,427 INFO L226 Difference]: Without dead ends: 961 [2020-07-20 21:42:12,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 784 SyntacticMatches, 105 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8007 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1295, Invalid=8805, Unknown=0, NotChecked=0, Total=10100 [2020-07-20 21:42:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-07-20 21:42:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 670. [2020-07-20 21:42:12,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2020-07-20 21:42:12,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1952 transitions. [2020-07-20 21:42:12,613 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1952 transitions. Word has length 475 [2020-07-20 21:42:12,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:12,613 INFO L479 AbstractCegarLoop]: Abstraction has 670 states and 1952 transitions. [2020-07-20 21:42:12,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-20 21:42:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1952 transitions. [2020-07-20 21:42:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2020-07-20 21:42:12,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:12,648 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 28, 27, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:12,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:12,863 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:12,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:12,864 INFO L82 PathProgramCache]: Analyzing trace with hash -932484209, now seen corresponding path program 44 times [2020-07-20 21:42:12,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:12,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638701851] [2020-07-20 21:42:12,865 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 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:14,014 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:42:14,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:42:14,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:42:14,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:42:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7873 backedges. 420 proven. 903 refuted. 0 times theorem prover too weak. 6550 trivial. 0 not checked. [2020-07-20 21:42:14,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:42:19,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:21,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:21,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:22,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:22,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:23,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:23,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:23,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:23,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7873 backedges. 426 proven. 921 refuted. 0 times theorem prover too weak. 6526 trivial. 0 not checked. [2020-07-20 21:42:24,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638701851] [2020-07-20 21:42:24,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:42:24,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:42:24,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505006905] [2020-07-20 21:42:24,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:42:24,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:42:24,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:42:24,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:42:24,285 INFO L87 Difference]: Start difference. First operand 670 states and 1952 transitions. Second operand 19 states. [2020-07-20 21:42:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:25,249 INFO L93 Difference]: Finished difference Result 987 states and 3002 transitions. [2020-07-20 21:42:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:42:25,255 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 524 [2020-07-20 21:42:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:25,297 INFO L225 Difference]: With dead ends: 987 [2020-07-20 21:42:25,297 INFO L226 Difference]: Without dead ends: 911 [2020-07-20 21:42:25,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1054 GetRequests, 1015 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:42:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2020-07-20 21:42:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 717. [2020-07-20 21:42:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717 states. [2020-07-20 21:42:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2104 transitions. [2020-07-20 21:42:25,649 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2104 transitions. Word has length 524 [2020-07-20 21:42:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:25,650 INFO L479 AbstractCegarLoop]: Abstraction has 717 states and 2104 transitions. [2020-07-20 21:42:25,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:42:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2104 transitions. [2020-07-20 21:42:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2020-07-20 21:42:25,719 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:25,720 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 37, 37, 34, 30, 25, 25, 25, 25, 25, 25, 25, 18, 18, 18, 18, 18, 18, 18, 16, 16, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:25,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:25,935 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1964830974, now seen corresponding path program 45 times [2020-07-20 21:42:25,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:25,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240047326] [2020-07-20 21:42:25,936 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 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:27,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:42:27,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:42:27,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:42:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:42:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10372 backedges. 1054 proven. 529 refuted. 0 times theorem prover too weak. 8789 trivial. 0 not checked. [2020-07-20 21:42:27,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:42:31,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:33,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:34,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:34,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:35,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:35,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:35,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:35,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:36,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10372 backedges. 1058 proven. 546 refuted. 0 times theorem prover too weak. 8768 trivial. 0 not checked. [2020-07-20 21:42:39,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240047326] [2020-07-20 21:42:39,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:42:39,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:42:39,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260680022] [2020-07-20 21:42:39,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:42:39,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:42:39,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:42:39,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:42:39,278 INFO L87 Difference]: Start difference. First operand 717 states and 2104 transitions. Second operand 19 states. [2020-07-20 21:42:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:40,367 INFO L93 Difference]: Finished difference Result 1277 states and 4101 transitions. [2020-07-20 21:42:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:42:40,373 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 593 [2020-07-20 21:42:40,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:40,430 INFO L225 Difference]: With dead ends: 1277 [2020-07-20 21:42:40,430 INFO L226 Difference]: Without dead ends: 1224 [2020-07-20 21:42:40,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 1153 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:42:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2020-07-20 21:42:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 670. [2020-07-20 21:42:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2020-07-20 21:42:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2015 transitions. [2020-07-20 21:42:40,668 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2015 transitions. Word has length 593 [2020-07-20 21:42:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:40,668 INFO L479 AbstractCegarLoop]: Abstraction has 670 states and 2015 transitions. [2020-07-20 21:42:40,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:42:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2015 transitions. [2020-07-20 21:42:40,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2020-07-20 21:42:40,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:40,696 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 32, 29, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:40,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:40,897 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:40,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1839153907, now seen corresponding path program 46 times [2020-07-20 21:42:40,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:40,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683040271] [2020-07-20 21:42:40,899 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 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:42,030 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:42:42,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:42:42,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:42:42,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:42:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 312 proven. 970 refuted. 0 times theorem prover too weak. 7540 trivial. 0 not checked. [2020-07-20 21:42:42,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:42:45,367 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:42:49,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:51,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:52,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:52,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:52,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:52,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:52,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 316 proven. 980 refuted. 0 times theorem prover too weak. 7526 trivial. 0 not checked. [2020-07-20 21:42:53,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683040271] [2020-07-20 21:42:53,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:42:53,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:42:53,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060990694] [2020-07-20 21:42:53,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:42:53,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:42:53,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:42:53,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:42:53,364 INFO L87 Difference]: Start difference. First operand 670 states and 2015 transitions. Second operand 19 states. [2020-07-20 21:42:54,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:54,549 INFO L93 Difference]: Finished difference Result 1077 states and 3260 transitions. [2020-07-20 21:42:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:42:54,552 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 554 [2020-07-20 21:42:54,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:54,573 INFO L225 Difference]: With dead ends: 1077 [2020-07-20 21:42:54,573 INFO L226 Difference]: Without dead ends: 744 [2020-07-20 21:42:54,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1077 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:42:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-07-20 21:42:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 649. [2020-07-20 21:42:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-07-20 21:42:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1787 transitions. [2020-07-20 21:42:54,706 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1787 transitions. Word has length 554 [2020-07-20 21:42:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:54,706 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1787 transitions. [2020-07-20 21:42:54,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:42:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1787 transitions. [2020-07-20 21:42:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2020-07-20 21:42:54,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:54,730 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 39, 39, 28, 27, 21, 21, 21, 21, 21, 21, 21, 19, 19, 19, 19, 19, 19, 19, 14, 12, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:54,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:54,935 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:54,936 INFO L82 PathProgramCache]: Analyzing trace with hash 857397479, now seen corresponding path program 47 times [2020-07-20 21:42:54,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:54,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287357771] [2020-07-20 21:42:54,937 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 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:56,079 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:42:56,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:42:56,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:42:56,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:42:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8661 backedges. 444 proven. 1009 refuted. 0 times theorem prover too weak. 7208 trivial. 0 not checked. [2020-07-20 21:42:56,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:42:59,204 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-20 21:43:02,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:02,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:05,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:06,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:07,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:07,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:07,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:08,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8661 backedges. 443 proven. 1031 refuted. 0 times theorem prover too weak. 7187 trivial. 0 not checked. [2020-07-20 21:43:08,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287357771] [2020-07-20 21:43:08,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:43:08,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 21:43:08,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272521362] [2020-07-20 21:43:08,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:43:08,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:43:08,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:43:08,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:43:08,689 INFO L87 Difference]: Start difference. First operand 649 states and 1787 transitions. Second operand 21 states. [2020-07-20 21:43:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:43:09,868 INFO L93 Difference]: Finished difference Result 760 states and 2108 transitions. [2020-07-20 21:43:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:43:09,871 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 548 [2020-07-20 21:43:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:43:09,887 INFO L225 Difference]: With dead ends: 760 [2020-07-20 21:43:09,888 INFO L226 Difference]: Without dead ends: 689 [2020-07-20 21:43:09,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1102 GetRequests, 1061 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:43:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2020-07-20 21:43:09,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 621. [2020-07-20 21:43:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-07-20 21:43:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1673 transitions. [2020-07-20 21:43:09,990 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1673 transitions. Word has length 548 [2020-07-20 21:43:09,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:43:09,991 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 1673 transitions. [2020-07-20 21:43:09,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:43:09,991 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1673 transitions. [2020-07-20 21:43:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2020-07-20 21:43:10,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:43:10,012 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 32, 29, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 12, 12, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:43:10,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:10,213 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:43:10,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:43:10,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1405729412, now seen corresponding path program 48 times [2020-07-20 21:43:10,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:43:10,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626221204] [2020-07-20 21:43:10,215 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 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:11,434 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:43:11,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:43:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:43:11,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:43:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9226 backedges. 594 proven. 646 refuted. 0 times theorem prover too weak. 7986 trivial. 0 not checked. [2020-07-20 21:43:11,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:43:18,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:18,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:18,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:18,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:19,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:19,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:19,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:19,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:20,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:20,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9226 backedges. 598 proven. 660 refuted. 0 times theorem prover too weak. 7968 trivial. 0 not checked. [2020-07-20 21:43:22,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626221204] [2020-07-20 21:43:22,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:43:22,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:43:22,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126990259] [2020-07-20 21:43:22,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:43:22,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:43:22,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:43:22,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:43:22,200 INFO L87 Difference]: Start difference. First operand 621 states and 1673 transitions. Second operand 17 states. [2020-07-20 21:43:23,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:43:23,122 INFO L93 Difference]: Finished difference Result 817 states and 2347 transitions. [2020-07-20 21:43:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:43:23,126 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 566 [2020-07-20 21:43:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:43:23,146 INFO L225 Difference]: With dead ends: 817 [2020-07-20 21:43:23,146 INFO L226 Difference]: Without dead ends: 776 [2020-07-20 21:43:23,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1103 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:43:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2020-07-20 21:43:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 604. [2020-07-20 21:43:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2020-07-20 21:43:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1572 transitions. [2020-07-20 21:43:23,267 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1572 transitions. Word has length 566 [2020-07-20 21:43:23,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:43:23,268 INFO L479 AbstractCegarLoop]: Abstraction has 604 states and 1572 transitions. [2020-07-20 21:43:23,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:43:23,268 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1572 transitions. [2020-07-20 21:43:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 21:43:23,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:43:23,289 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 27, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:43:23,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:23,490 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:43:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:43:23,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1646380859, now seen corresponding path program 49 times [2020-07-20 21:43:23,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:43:23,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223315211] [2020-07-20 21:43:23,491 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 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:24,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:43:24,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:43:24,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:43:24,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:43:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 563 proven. 682 refuted. 0 times theorem prover too weak. 5877 trivial. 0 not checked. [2020-07-20 21:43:25,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:43:31,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:31,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:32,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:33,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:34,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:34,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:34,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:34,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:35,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:35,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 565 proven. 706 refuted. 0 times theorem prover too weak. 5851 trivial. 0 not checked. [2020-07-20 21:43:36,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223315211] [2020-07-20 21:43:36,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:43:36,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:43:36,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181213321] [2020-07-20 21:43:36,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:43:36,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:43:36,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:43:36,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:43:36,859 INFO L87 Difference]: Start difference. First operand 604 states and 1572 transitions. Second operand 19 states. [2020-07-20 21:43:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:43:37,913 INFO L93 Difference]: Finished difference Result 688 states and 1693 transitions. [2020-07-20 21:43:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:43:37,918 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 499 [2020-07-20 21:43:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:43:37,933 INFO L225 Difference]: With dead ends: 688 [2020-07-20 21:43:37,933 INFO L226 Difference]: Without dead ends: 665 [2020-07-20 21:43:37,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 965 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:43:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2020-07-20 21:43:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 535. [2020-07-20 21:43:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-07-20 21:43:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1335 transitions. [2020-07-20 21:43:38,023 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1335 transitions. Word has length 499 [2020-07-20 21:43:38,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:43:38,023 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 1335 transitions. [2020-07-20 21:43:38,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:43:38,023 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1335 transitions. [2020-07-20 21:43:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2020-07-20 21:43:38,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:43:38,040 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 37, 37, 28, 28, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 12, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:43:38,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:38,241 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:43:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:43:38,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1794862511, now seen corresponding path program 50 times [2020-07-20 21:43:38,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:43:38,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976563577] [2020-07-20 21:43:38,243 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 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:39,508 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:43:39,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:43:39,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:43:39,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:43:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7912 backedges. 607 proven. 780 refuted. 0 times theorem prover too weak. 6525 trivial. 0 not checked. [2020-07-20 21:43:39,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:43:42,674 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:43:47,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:47,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:48,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:50,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:50,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:50,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:51,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:51,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:51,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:52,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7912 backedges. 604 proven. 804 refuted. 0 times theorem prover too weak. 6504 trivial. 0 not checked. [2020-07-20 21:43:53,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976563577] [2020-07-20 21:43:53,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:43:53,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 21:43:53,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349677826] [2020-07-20 21:43:53,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:43:53,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:43:53,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:43:53,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:43:53,565 INFO L87 Difference]: Start difference. First operand 535 states and 1335 transitions. Second operand 21 states. [2020-07-20 21:43:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:43:54,878 INFO L93 Difference]: Finished difference Result 726 states and 1776 transitions. [2020-07-20 21:43:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:43:54,884 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 525 [2020-07-20 21:43:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:43:54,898 INFO L225 Difference]: With dead ends: 726 [2020-07-20 21:43:54,898 INFO L226 Difference]: Without dead ends: 697 [2020-07-20 21:43:54,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1015 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:43:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-07-20 21:43:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 498. [2020-07-20 21:43:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-07-20 21:43:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1212 transitions. [2020-07-20 21:43:55,055 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1212 transitions. Word has length 525 [2020-07-20 21:43:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:43:55,056 INFO L479 AbstractCegarLoop]: Abstraction has 498 states and 1212 transitions. [2020-07-20 21:43:55,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:43:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1212 transitions. [2020-07-20 21:43:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 21:43:55,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:43:55,070 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 28, 25, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:43:55,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:55,271 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:43:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:43:55,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1807452486, now seen corresponding path program 51 times [2020-07-20 21:43:55,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:43:55,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172628040] [2020-07-20 21:43:55,273 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 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:56,517 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:43:56,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:43:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:43:56,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:43:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 364 proven. 742 refuted. 0 times theorem prover too weak. 5628 trivial. 0 not checked. [2020-07-20 21:43:56,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:43:59,454 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 21:44:03,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:03,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:05,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:05,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:06,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:06,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:06,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:06,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:06,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:07,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:07,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 366 proven. 756 refuted. 0 times theorem prover too weak. 5612 trivial. 0 not checked. [2020-07-20 21:44:08,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172628040] [2020-07-20 21:44:08,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:44:08,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:44:08,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645554432] [2020-07-20 21:44:08,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:44:08,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:44:08,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:44:08,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:44:08,226 INFO L87 Difference]: Start difference. First operand 498 states and 1212 transitions. Second operand 19 states. [2020-07-20 21:44:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:44:09,361 INFO L93 Difference]: Finished difference Result 776 states and 2124 transitions. [2020-07-20 21:44:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:44:09,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 486 [2020-07-20 21:44:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:44:09,394 INFO L225 Difference]: With dead ends: 776 [2020-07-20 21:44:09,394 INFO L226 Difference]: Without dead ends: 723 [2020-07-20 21:44:09,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 941 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:44:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2020-07-20 21:44:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 516. [2020-07-20 21:44:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-07-20 21:44:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1244 transitions. [2020-07-20 21:44:09,505 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1244 transitions. Word has length 486 [2020-07-20 21:44:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:44:09,505 INFO L479 AbstractCegarLoop]: Abstraction has 516 states and 1244 transitions. [2020-07-20 21:44:09,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:44:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1244 transitions. [2020-07-20 21:44:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 21:44:09,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:44:09,522 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 29, 26, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:44:09,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:09,723 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:44:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:44:09,724 INFO L82 PathProgramCache]: Analyzing trace with hash 357569662, now seen corresponding path program 52 times [2020-07-20 21:44:09,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:44:09,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041691915] [2020-07-20 21:44:09,726 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 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:11,059 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:44:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:44:11,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:44:11,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:44:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6787 backedges. 575 proven. 539 refuted. 0 times theorem prover too weak. 5673 trivial. 0 not checked. [2020-07-20 21:44:11,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:44:17,981 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-07-20 21:44:18,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:18,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:19,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:19,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:19,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:20,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:20,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:20,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:20,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:21,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6787 backedges. 575 proven. 553 refuted. 0 times theorem prover too weak. 5659 trivial. 0 not checked. [2020-07-20 21:44:23,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041691915] [2020-07-20 21:44:23,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:44:23,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:44:23,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867768700] [2020-07-20 21:44:23,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:44:23,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:44:23,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:44:23,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:44:23,175 INFO L87 Difference]: Start difference. First operand 516 states and 1244 transitions. Second operand 19 states. [2020-07-20 21:44:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:44:24,256 INFO L93 Difference]: Finished difference Result 569 states and 1350 transitions. [2020-07-20 21:44:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:44:24,262 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 488 [2020-07-20 21:44:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:44:24,274 INFO L225 Difference]: With dead ends: 569 [2020-07-20 21:44:24,274 INFO L226 Difference]: Without dead ends: 540 [2020-07-20 21:44:24,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 945 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:44:24,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-07-20 21:44:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 513. [2020-07-20 21:44:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-07-20 21:44:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1225 transitions. [2020-07-20 21:44:24,349 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1225 transitions. Word has length 488 [2020-07-20 21:44:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:44:24,349 INFO L479 AbstractCegarLoop]: Abstraction has 513 states and 1225 transitions. [2020-07-20 21:44:24,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:44:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1225 transitions. [2020-07-20 21:44:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2020-07-20 21:44:24,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:44:24,365 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 37, 37, 32, 29, 22, 22, 22, 22, 22, 22, 22, 18, 18, 18, 18, 18, 18, 18, 14, 12, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:44:24,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:24,567 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:44:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:44:24,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1738358913, now seen corresponding path program 53 times [2020-07-20 21:44:24,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:44:24,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646486351] [2020-07-20 21:44:24,569 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 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:25,935 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:44:25,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:44:25,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:44:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:44:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8886 backedges. 811 proven. 407 refuted. 0 times theorem prover too weak. 7668 trivial. 0 not checked. [2020-07-20 21:44:26,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:44:30,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:30,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:32,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:33,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:33,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:33,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:33,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:33,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:34,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:34,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8886 backedges. 815 proven. 421 refuted. 0 times theorem prover too weak. 7650 trivial. 0 not checked. [2020-07-20 21:44:37,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646486351] [2020-07-20 21:44:37,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:44:37,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:44:37,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442719746] [2020-07-20 21:44:37,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:44:37,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:44:37,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:44:37,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:44:37,616 INFO L87 Difference]: Start difference. First operand 513 states and 1225 transitions. Second operand 17 states. [2020-07-20 21:44:38,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:44:38,466 INFO L93 Difference]: Finished difference Result 662 states and 1578 transitions. [2020-07-20 21:44:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:44:38,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 554 [2020-07-20 21:44:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:44:38,488 INFO L225 Difference]: With dead ends: 662 [2020-07-20 21:44:38,488 INFO L226 Difference]: Without dead ends: 629 [2020-07-20 21:44:38,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1079 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:44:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-07-20 21:44:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 510. [2020-07-20 21:44:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-07-20 21:44:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1189 transitions. [2020-07-20 21:44:38,568 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1189 transitions. Word has length 554 [2020-07-20 21:44:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:44:38,569 INFO L479 AbstractCegarLoop]: Abstraction has 510 states and 1189 transitions. [2020-07-20 21:44:38,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:44:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1189 transitions. [2020-07-20 21:44:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 21:44:38,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:44:38,585 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 27, 26, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:44:38,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:38,786 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:44:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:44:38,787 INFO L82 PathProgramCache]: Analyzing trace with hash -297553461, now seen corresponding path program 54 times [2020-07-20 21:44:38,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:44:38,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142645453] [2020-07-20 21:44:38,788 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 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:40,158 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:44:40,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:44:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:44:40,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:44:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7084 backedges. 508 proven. 630 refuted. 0 times theorem prover too weak. 5946 trivial. 0 not checked. [2020-07-20 21:44:40,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:44:43,463 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-07-20 21:44:47,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:48,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:48,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:49,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:49,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:50,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:50,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:50,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7084 backedges. 510 proven. 642 refuted. 0 times theorem prover too weak. 5932 trivial. 0 not checked. [2020-07-20 21:44:52,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142645453] [2020-07-20 21:44:52,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:44:52,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:44:52,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835797503] [2020-07-20 21:44:52,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:44:52,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:44:52,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:44:52,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:44:52,478 INFO L87 Difference]: Start difference. First operand 510 states and 1189 transitions. Second operand 19 states. [2020-07-20 21:44:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:44:53,600 INFO L93 Difference]: Finished difference Result 845 states and 1997 transitions. [2020-07-20 21:44:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:44:53,607 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 498 [2020-07-20 21:44:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:44:53,626 INFO L225 Difference]: With dead ends: 845 [2020-07-20 21:44:53,627 INFO L226 Difference]: Without dead ends: 813 [2020-07-20 21:44:53,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 965 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:44:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2020-07-20 21:44:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 461. [2020-07-20 21:44:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-07-20 21:44:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1080 transitions. [2020-07-20 21:44:53,721 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1080 transitions. Word has length 498 [2020-07-20 21:44:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:44:53,721 INFO L479 AbstractCegarLoop]: Abstraction has 461 states and 1080 transitions. [2020-07-20 21:44:53,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:44:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1080 transitions. [2020-07-20 21:44:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2020-07-20 21:44:53,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:44:53,735 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 35, 35, 30, 29, 22, 22, 22, 22, 22, 22, 22, 17, 17, 17, 17, 17, 17, 17, 14, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:44:53,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:53,936 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:44:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:44:53,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1151240652, now seen corresponding path program 55 times [2020-07-20 21:44:53,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:44:53,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526679953] [2020-07-20 21:44:53,938 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 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:55,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:44:55,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:44:55,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:44:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:44:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8473 backedges. 478 proven. 566 refuted. 0 times theorem prover too weak. 7429 trivial. 0 not checked. [2020-07-20 21:44:55,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:45:02,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:03,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:03,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:04,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:04,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:04,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:04,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:04,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:05,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8473 backedges. 478 proven. 576 refuted. 0 times theorem prover too weak. 7419 trivial. 0 not checked. [2020-07-20 21:45:07,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526679953] [2020-07-20 21:45:07,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:45:07,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 21:45:07,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856609484] [2020-07-20 21:45:07,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:45:07,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:45:07,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:45:07,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:45:07,235 INFO L87 Difference]: Start difference. First operand 461 states and 1080 transitions. Second operand 17 states. [2020-07-20 21:45:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:45:08,187 INFO L93 Difference]: Finished difference Result 561 states and 1356 transitions. [2020-07-20 21:45:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:45:08,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 540 [2020-07-20 21:45:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:45:08,204 INFO L225 Difference]: With dead ends: 561 [2020-07-20 21:45:08,205 INFO L226 Difference]: Without dead ends: 529 [2020-07-20 21:45:08,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1084 GetRequests, 1053 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:45:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-07-20 21:45:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 452. [2020-07-20 21:45:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2020-07-20 21:45:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1027 transitions. [2020-07-20 21:45:08,277 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1027 transitions. Word has length 540 [2020-07-20 21:45:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:45:08,277 INFO L479 AbstractCegarLoop]: Abstraction has 452 states and 1027 transitions. [2020-07-20 21:45:08,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:45:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1027 transitions. [2020-07-20 21:45:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 21:45:08,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:45:08,290 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 28, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:45:08,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:45:08,491 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:45:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:45:08,492 INFO L82 PathProgramCache]: Analyzing trace with hash 811422574, now seen corresponding path program 56 times [2020-07-20 21:45:08,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:45:08,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090371021] [2020-07-20 21:45:08,493 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 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:45:09,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:45:09,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:45:09,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:45:09,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:45:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6812 backedges. 811 proven. 242 refuted. 0 times theorem prover too weak. 5759 trivial. 0 not checked. [2020-07-20 21:45:10,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:45:14,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:14,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:16,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:16,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:16,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:17,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:17,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:17,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:17,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:18,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:19,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6812 backedges. 811 proven. 264 refuted. 0 times theorem prover too weak. 5737 trivial. 0 not checked. [2020-07-20 21:45:22,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090371021] [2020-07-20 21:45:22,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:45:22,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:45:22,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113217435] [2020-07-20 21:45:22,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:45:22,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:45:22,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:45:22,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:45:22,243 INFO L87 Difference]: Start difference. First operand 452 states and 1027 transitions. Second operand 17 states. [2020-07-20 21:45:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:45:23,352 INFO L93 Difference]: Finished difference Result 590 states and 1424 transitions. [2020-07-20 21:45:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:45:23,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 489 [2020-07-20 21:45:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:45:23,365 INFO L225 Difference]: With dead ends: 590 [2020-07-20 21:45:23,365 INFO L226 Difference]: Without dead ends: 557 [2020-07-20 21:45:23,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 949 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:45:23,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2020-07-20 21:45:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 463. [2020-07-20 21:45:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-07-20 21:45:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1065 transitions. [2020-07-20 21:45:23,442 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1065 transitions. Word has length 489 [2020-07-20 21:45:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:45:23,442 INFO L479 AbstractCegarLoop]: Abstraction has 463 states and 1065 transitions. [2020-07-20 21:45:23,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:45:23,443 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1065 transitions. [2020-07-20 21:45:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-20 21:45:23,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:45:23,458 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 28, 28, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 11, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:45:23,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:45:23,659 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:45:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:45:23,660 INFO L82 PathProgramCache]: Analyzing trace with hash -594895101, now seen corresponding path program 57 times [2020-07-20 21:45:23,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:45:23,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890801081] [2020-07-20 21:45:23,661 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 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:45:25,021 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:45:25,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:45:25,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:45:25,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:45:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 936 proven. 256 refuted. 0 times theorem prover too weak. 5276 trivial. 0 not checked. [2020-07-20 21:45:25,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:45:28,340 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:45:28,445 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:45:28,549 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:45:28,934 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:45:31,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:31,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:33,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:33,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:34,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:34,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:34,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:35,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:35,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:35,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:35,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:35,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:36,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 936 proven. 282 refuted. 0 times theorem prover too weak. 5250 trivial. 0 not checked. [2020-07-20 21:45:40,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890801081] [2020-07-20 21:45:40,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:45:40,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:45:40,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818333635] [2020-07-20 21:45:40,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:45:40,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:45:40,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:45:40,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:45:40,212 INFO L87 Difference]: Start difference. First operand 463 states and 1065 transitions. Second operand 19 states. [2020-07-20 21:45:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:45:41,693 INFO L93 Difference]: Finished difference Result 554 states and 1256 transitions. [2020-07-20 21:45:41,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:45:41,699 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 477 [2020-07-20 21:45:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:45:41,710 INFO L225 Difference]: With dead ends: 554 [2020-07-20 21:45:41,710 INFO L226 Difference]: Without dead ends: 521 [2020-07-20 21:45:41,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 921 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:45:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-07-20 21:45:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 458. [2020-07-20 21:45:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-07-20 21:45:41,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1021 transitions. [2020-07-20 21:45:41,783 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1021 transitions. Word has length 477 [2020-07-20 21:45:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:45:41,783 INFO L479 AbstractCegarLoop]: Abstraction has 458 states and 1021 transitions. [2020-07-20 21:45:41,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:45:41,784 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1021 transitions. [2020-07-20 21:45:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 21:45:41,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:45:41,799 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 28, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:45:42,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:45:42,000 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:45:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:45:42,001 INFO L82 PathProgramCache]: Analyzing trace with hash -307679003, now seen corresponding path program 58 times [2020-07-20 21:45:42,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:45:42,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497244881] [2020-07-20 21:45:42,002 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 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:45:43,403 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:45:43,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:45:43,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:45:43,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:45:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 740 proven. 115 refuted. 0 times theorem prover too weak. 5586 trivial. 0 not checked. [2020-07-20 21:45:43,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:45:46,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:46,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:47,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:47,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:47,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:47,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:47,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:47,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:47,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:47,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:48,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:49,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 740 proven. 129 refuted. 0 times theorem prover too weak. 5572 trivial. 0 not checked. [2020-07-20 21:45:51,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497244881] [2020-07-20 21:45:51,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:45:51,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:45:51,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989323530] [2020-07-20 21:45:51,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:45:51,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:45:51,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:45:51,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:45:51,749 INFO L87 Difference]: Start difference. First operand 458 states and 1021 transitions. Second operand 15 states. [2020-07-20 21:45:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:45:52,447 INFO L93 Difference]: Finished difference Result 489 states and 1058 transitions. [2020-07-20 21:45:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:45:52,447 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 476 [2020-07-20 21:45:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:45:52,453 INFO L225 Difference]: With dead ends: 489 [2020-07-20 21:45:52,454 INFO L226 Difference]: Without dead ends: 467 [2020-07-20 21:45:52,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 927 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:45:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-07-20 21:45:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 441. [2020-07-20 21:45:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-07-20 21:45:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 939 transitions. [2020-07-20 21:45:52,506 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 939 transitions. Word has length 476 [2020-07-20 21:45:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:45:52,506 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 939 transitions. [2020-07-20 21:45:52,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:45:52,506 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 939 transitions. [2020-07-20 21:45:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-20 21:45:52,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:45:52,517 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:45:52,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:45:52,718 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:45:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:45:52,718 INFO L82 PathProgramCache]: Analyzing trace with hash -357877815, now seen corresponding path program 59 times [2020-07-20 21:45:52,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:45:52,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725723647] [2020-07-20 21:45:52,719 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 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:45:54,039 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:45:54,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:45:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:45:54,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:45:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 532 proven. 113 refuted. 0 times theorem prover too weak. 5099 trivial. 0 not checked. [2020-07-20 21:45:54,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:45:56,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:56,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:56,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:56,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:57,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:57,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:58,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 532 proven. 120 refuted. 0 times theorem prover too weak. 5092 trivial. 0 not checked. [2020-07-20 21:46:01,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725723647] [2020-07-20 21:46:01,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:46:01,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 21:46:01,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480539756] [2020-07-20 21:46:01,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:46:01,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:46:01,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:46:01,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:46:01,089 INFO L87 Difference]: Start difference. First operand 441 states and 939 transitions. Second operand 13 states. [2020-07-20 21:46:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:46:01,634 INFO L93 Difference]: Finished difference Result 522 states and 1128 transitions. [2020-07-20 21:46:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:46:01,638 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 450 [2020-07-20 21:46:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:46:01,647 INFO L225 Difference]: With dead ends: 522 [2020-07-20 21:46:01,647 INFO L226 Difference]: Without dead ends: 509 [2020-07-20 21:46:01,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 879 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:46:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2020-07-20 21:46:01,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 438. [2020-07-20 21:46:01,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-07-20 21:46:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 933 transitions. [2020-07-20 21:46:01,702 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 933 transitions. Word has length 450 [2020-07-20 21:46:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:46:01,703 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 933 transitions. [2020-07-20 21:46:01,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:46:01,703 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 933 transitions. [2020-07-20 21:46:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 21:46:01,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:46:01,712 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 26, 26, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:46:01,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:46:01,913 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:46:01,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:46:01,914 INFO L82 PathProgramCache]: Analyzing trace with hash 697046151, now seen corresponding path program 60 times [2020-07-20 21:46:01,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:46:01,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938530798] [2020-07-20 21:46:01,915 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 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:46:03,352 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:46:03,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:46:03,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:46:03,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:46:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 825 proven. 175 refuted. 0 times theorem prover too weak. 5374 trivial. 0 not checked. [2020-07-20 21:46:03,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:46:07,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:07,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:08,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:08,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:08,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:09,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:09,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:09,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:09,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:10,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 831 proven. 183 refuted. 0 times theorem prover too weak. 5360 trivial. 0 not checked. [2020-07-20 21:46:13,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938530798] [2020-07-20 21:46:13,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:46:13,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:46:13,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263352064] [2020-07-20 21:46:13,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:46:13,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:46:13,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:46:13,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:46:13,323 INFO L87 Difference]: Start difference. First operand 438 states and 933 transitions. Second operand 17 states. [2020-07-20 21:46:14,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:46:14,235 INFO L93 Difference]: Finished difference Result 547 states and 1164 transitions. [2020-07-20 21:46:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:46:14,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 473 [2020-07-20 21:46:14,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:46:14,250 INFO L225 Difference]: With dead ends: 547 [2020-07-20 21:46:14,251 INFO L226 Difference]: Without dead ends: 531 [2020-07-20 21:46:14,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 917 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:46:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2020-07-20 21:46:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 421. [2020-07-20 21:46:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-07-20 21:46:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 889 transitions. [2020-07-20 21:46:14,352 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 889 transitions. Word has length 473 [2020-07-20 21:46:14,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:46:14,353 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 889 transitions. [2020-07-20 21:46:14,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:46:14,353 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 889 transitions. [2020-07-20 21:46:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-20 21:46:14,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:46:14,374 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 26, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:46:14,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:46:14,589 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:46:14,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:46:14,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2069554227, now seen corresponding path program 61 times [2020-07-20 21:46:14,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:46:14,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104019855] [2020-07-20 21:46:14,591 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 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:46:15,939 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:46:15,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:46:15,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:46:15,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:46:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6388 backedges. 683 proven. 147 refuted. 0 times theorem prover too weak. 5558 trivial. 0 not checked. [2020-07-20 21:46:16,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:46:16,712 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 21:46:19,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:19,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:19,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:20,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:20,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:20,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:20,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:20,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:22,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6388 backedges. 685 proven. 155 refuted. 0 times theorem prover too weak. 5548 trivial. 0 not checked. [2020-07-20 21:46:24,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104019855] [2020-07-20 21:46:24,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:46:24,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:46:24,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435156679] [2020-07-20 21:46:24,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:46:24,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:46:24,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:46:24,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:46:24,886 INFO L87 Difference]: Start difference. First operand 421 states and 889 transitions. Second operand 15 states. [2020-07-20 21:46:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:46:25,621 INFO L93 Difference]: Finished difference Result 477 states and 999 transitions. [2020-07-20 21:46:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:46:25,626 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 474 [2020-07-20 21:46:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:46:25,636 INFO L225 Difference]: With dead ends: 477 [2020-07-20 21:46:25,637 INFO L226 Difference]: Without dead ends: 461 [2020-07-20 21:46:25,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:46:25,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-07-20 21:46:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 394. [2020-07-20 21:46:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-07-20 21:46:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 832 transitions. [2020-07-20 21:46:25,695 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 832 transitions. Word has length 474 [2020-07-20 21:46:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:46:25,695 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 832 transitions. [2020-07-20 21:46:25,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:46:25,696 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 832 transitions. [2020-07-20 21:46:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 21:46:25,705 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:46:25,705 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 28, 26, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 12, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:46:25,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:46:25,907 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:46:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:46:25,907 INFO L82 PathProgramCache]: Analyzing trace with hash -385952660, now seen corresponding path program 62 times [2020-07-20 21:46:25,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:46:25,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367809313] [2020-07-20 21:46:25,908 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 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:46:27,264 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:46:27,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:46:27,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:46:27,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:46:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6791 backedges. 807 proven. 248 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2020-07-20 21:46:27,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:46:31,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:31,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:32,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:32,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:33,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:33,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:33,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:33,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:33,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:33,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:33,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:34,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6791 backedges. 809 proven. 264 refuted. 0 times theorem prover too weak. 5718 trivial. 0 not checked. [2020-07-20 21:46:37,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367809313] [2020-07-20 21:46:37,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:46:37,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:46:37,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568576135] [2020-07-20 21:46:37,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:46:37,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:46:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:46:37,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:46:37,018 INFO L87 Difference]: Start difference. First operand 394 states and 832 transitions. Second operand 17 states. [2020-07-20 21:46:37,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:46:37,777 INFO L93 Difference]: Finished difference Result 455 states and 929 transitions. [2020-07-20 21:46:37,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:46:37,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 487 [2020-07-20 21:46:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:46:37,784 INFO L225 Difference]: With dead ends: 455 [2020-07-20 21:46:37,784 INFO L226 Difference]: Without dead ends: 427 [2020-07-20 21:46:37,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 945 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:46:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-07-20 21:46:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 391. [2020-07-20 21:46:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-07-20 21:46:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 823 transitions. [2020-07-20 21:46:37,855 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 823 transitions. Word has length 487 [2020-07-20 21:46:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:46:37,856 INFO L479 AbstractCegarLoop]: Abstraction has 391 states and 823 transitions. [2020-07-20 21:46:37,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:46:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 823 transitions. [2020-07-20 21:46:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 21:46:37,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:46:37,872 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 29, 28, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:46:38,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:46:38,086 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:46:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:46:38,087 INFO L82 PathProgramCache]: Analyzing trace with hash 252822541, now seen corresponding path program 63 times [2020-07-20 21:46:38,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:46:38,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313695428] [2020-07-20 21:46:38,088 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 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:46:39,390 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:46:39,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:46:39,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:46:39,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:46:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 810 proven. 340 refuted. 0 times theorem prover too weak. 6042 trivial. 0 not checked. [2020-07-20 21:46:39,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:46:42,350 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-07-20 21:46:43,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:43,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:45,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:46,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:46,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:46,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:47,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:47,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:48,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 810 proven. 354 refuted. 0 times theorem prover too weak. 6028 trivial. 0 not checked. [2020-07-20 21:46:51,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313695428] [2020-07-20 21:46:51,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:46:51,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:46:51,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905622645] [2020-07-20 21:46:51,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:46:51,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:46:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:46:51,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:46:51,041 INFO L87 Difference]: Start difference. First operand 391 states and 823 transitions. Second operand 19 states. [2020-07-20 21:46:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:46:52,125 INFO L93 Difference]: Finished difference Result 549 states and 1143 transitions. [2020-07-20 21:46:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:46:52,130 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 502 [2020-07-20 21:46:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:46:52,143 INFO L225 Difference]: With dead ends: 549 [2020-07-20 21:46:52,143 INFO L226 Difference]: Without dead ends: 521 [2020-07-20 21:46:52,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 973 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:46:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-07-20 21:46:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 371. [2020-07-20 21:46:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-07-20 21:46:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 774 transitions. [2020-07-20 21:46:52,235 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 774 transitions. Word has length 502 [2020-07-20 21:46:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:46:52,236 INFO L479 AbstractCegarLoop]: Abstraction has 371 states and 774 transitions. [2020-07-20 21:46:52,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:46:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 774 transitions. [2020-07-20 21:46:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 21:46:52,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:46:52,251 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:46:52,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:46:52,466 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:46:52,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:46:52,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1707964457, now seen corresponding path program 64 times [2020-07-20 21:46:52,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:46:52,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686246170] [2020-07-20 21:46:52,467 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 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:46:53,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:46:53,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:46:53,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:46:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:46:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 887 proven. 141 refuted. 0 times theorem prover too weak. 5425 trivial. 0 not checked. [2020-07-20 21:46:54,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:46:58,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:58,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:58,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:58,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:59,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:59,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:59,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:46:59,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:47:00,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:47:00,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:47:01,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:47:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 889 proven. 157 refuted. 0 times theorem prover too weak. 5407 trivial. 0 not checked. [2020-07-20 21:47:04,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686246170] [2020-07-20 21:47:04,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:47:04,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:47:04,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371019552] [2020-07-20 21:47:04,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:47:04,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:47:04,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:47:04,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:47:04,644 INFO L87 Difference]: Start difference. First operand 371 states and 774 transitions. Second operand 17 states. [2020-07-20 21:47:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:47:05,576 INFO L93 Difference]: Finished difference Result 536 states and 1101 transitions. [2020-07-20 21:47:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:47:05,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-20 21:47:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:47:05,585 INFO L225 Difference]: With dead ends: 536 [2020-07-20 21:47:05,585 INFO L226 Difference]: Without dead ends: 517 [2020-07-20 21:47:05,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 923 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:47:05,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-20 21:47:05,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 353. [2020-07-20 21:47:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-07-20 21:47:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 749 transitions. [2020-07-20 21:47:05,630 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 749 transitions. Word has length 476 [2020-07-20 21:47:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:47:05,630 INFO L479 AbstractCegarLoop]: Abstraction has 353 states and 749 transitions. [2020-07-20 21:47:05,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:47:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 749 transitions. [2020-07-20 21:47:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-20 21:47:05,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:47:05,638 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:47:05,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:47:05,838 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:47:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:47:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 65 times [2020-07-20 21:47:05,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:47:05,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788599325] [2020-07-20 21:47:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:47:07,250 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:47:07,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:47:07,251 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:47:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:47:07,342 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:47:07,470 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:47:07,470 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:47:07,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:47:07,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:47:07 BoogieIcfgContainer [2020-07-20 21:47:07,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:47:07,791 INFO L168 Benchmark]: Toolchain (without parser) took 657411.59 ms. Allocated memory was 136.8 MB in the beginning and 2.5 GB in the end (delta: 2.4 GB). Free memory was 101.7 MB in the beginning and 399.2 MB in the end (delta: -297.4 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2020-07-20 21:47:07,792 INFO L168 Benchmark]: CDTParser took 2.48 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 21:47:07,792 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.78 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:47:07,793 INFO L168 Benchmark]: Boogie Preprocessor took 162.95 ms. Allocated memory was 136.8 MB in the beginning and 202.4 MB in the end (delta: 65.5 MB). Free memory was 91.7 MB in the beginning and 181.2 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:47:07,793 INFO L168 Benchmark]: RCFGBuilder took 428.61 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 167.4 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-20 21:47:07,794 INFO L168 Benchmark]: TraceAbstraction took 656421.55 ms. Allocated memory was 202.4 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 167.4 MB in the beginning and 399.2 MB in the end (delta: -231.8 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2020-07-20 21:47:07,796 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.48 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 387.78 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 162.95 ms. Allocated memory was 136.8 MB in the beginning and 202.4 MB in the end (delta: 65.5 MB). Free memory was 91.7 MB in the beginning and 181.2 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.61 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 167.4 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 656421.55 ms. Allocated memory was 202.4 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 167.4 MB in the beginning and 399.2 MB in the end (delta: -231.8 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 8; VAL [x=8] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=8] [L8] COND FALSE !(n < 1) VAL [\old(n)=8, n=8] [L10] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=7] [L18] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L20] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=7, fibo1(n-1)=8, n=7] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=7, fibo1(n-1)=8, fibo1(n-2)=5, n=7] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=8, fibo2(n-1)=13, n=8] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=6] [L18] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L20] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=6, fibo1(n-1)=5, n=6] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=6, fibo1(n-1)=5, fibo1(n-2)=3, n=6] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=8, fibo2(n-1)=13, fibo2(n-2)=8, n=8] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=21, x=8] [L37] int result = fibo1(x); [L38] COND TRUE result == 21 VAL [result=21, x=8] [L39] __VERIFIER_error() VAL [result=21, x=8] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 656.1s, OverallIterations: 82, TraceHistogramMax: 53, AutomataDifference: 55.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2439 SDtfs, 3820 SDslu, 17385 SDs, 0 SdLazy, 18139 SolverSat, 3895 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 65559 GetRequests, 62671 SyntacticMatches, 1106 SemanticMatches, 1782 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16182 ImplicationChecksByTransitivity, 56.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=717occurred in iteration=61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 81 MinimizatonAttempts, 5696 StatesRemovedByMinimization, 77 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 8.2s SatisfiabilityAnalysisTime, 521.1s InterpolantComputationTime, 33029 NumberOfCodeBlocks, 26785 NumberOfCodeBlocksAsserted, 259 NumberOfCheckSat, 64945 ConstructedInterpolants, 0 QuantifiedInterpolants, 39593332 SizeOfPredicates, 551 NumberOfNonLiveVariables, 63759 ConjunctsInSsa, 1252 ConjunctsInUnsatCore, 160 InterpolantComputations, 2 PerfectInterpolantSequences, 785643/865216 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...