/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:56:46,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:56:46,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:56:46,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:56:46,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:56:46,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:56:46,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:56:46,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:56:46,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:56:46,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:56:46,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:56:46,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:56:46,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:56:46,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:56:46,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:56:46,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:56:46,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:56:46,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:56:46,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:56:46,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:56:46,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:56:46,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:56:46,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:56:46,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:56:46,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:56:46,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:56:46,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:56:46,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:56:46,892 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 15:56:46,910 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:56:46,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:56:46,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:56:46,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:56:46,914 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:56:46,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:56:46,915 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:56:46,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:56:46,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:56:46,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:56:46,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:56:46,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:56:46,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:56:46,917 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:56:46,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:56:46,917 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:56:46,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:56:46,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:56:46,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:56:46,918 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:56:46,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:56:46,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:56:46,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:56:46,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:56:46,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:56:46,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:56:46,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:46,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:56:46,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:56:46,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:56:47,405 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:56:47,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:56:47,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:56:47,436 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:56:47,437 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:56:47,438 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c [2020-07-21 15:56:47,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d090eb1d/b65b944eef3e4bdda2a9881bf1cd8fe6/FLAGf0fe9ee62 [2020-07-21 15:56:48,070 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:56:48,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c [2020-07-21 15:56:48,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d090eb1d/b65b944eef3e4bdda2a9881bf1cd8fe6/FLAGf0fe9ee62 [2020-07-21 15:56:48,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d090eb1d/b65b944eef3e4bdda2a9881bf1cd8fe6 [2020-07-21 15:56:48,419 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:56:48,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:56:48,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:56:48,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:56:48,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:56:48,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:56:48" (1/1) ... [2020-07-21 15:56:48,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f68da92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:56:48, skipping insertion in model container [2020-07-21 15:56:48,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:56:48" (1/1) ... [2020-07-21 15:56:48,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:56:48,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:56:48,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:56:48,793 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:56:48,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:56:48,842 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:56:48,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:56:48 WrapperNode [2020-07-21 15:56:48,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:56:48,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:56:48,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:56:48,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:56:48,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:56:48" (1/1) ... [2020-07-21 15:56:48,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:56:48" (1/1) ... [2020-07-21 15:56:48,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:56:48" (1/1) ... [2020-07-21 15:56:48,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:56:48" (1/1) ... [2020-07-21 15:56:49,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:56:48" (1/1) ... [2020-07-21 15:56:49,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:56:48" (1/1) ... [2020-07-21 15:56:49,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:56:48" (1/1) ... [2020-07-21 15:56:49,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:56:49,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:56:49,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:56:49,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:56:49,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:56:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:56:49,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:56:49,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:56:49,112 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 15:56:49,112 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 15:56:49,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:56:49,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:56:49,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:56:49,113 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 15:56:49,113 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 15:56:49,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:56:49,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:56:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:56:49,367 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:56:49,368 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:56:49,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:56:49 BoogieIcfgContainer [2020-07-21 15:56:49,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:56:49,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:56:49,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:56:49,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:56:49,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:56:48" (1/3) ... [2020-07-21 15:56:49,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ce8bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:56:49, skipping insertion in model container [2020-07-21 15:56:49,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:56:48" (2/3) ... [2020-07-21 15:56:49,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ce8bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:56:49, skipping insertion in model container [2020-07-21 15:56:49,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:56:49" (3/3) ... [2020-07-21 15:56:49,391 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-2.c [2020-07-21 15:56:49,406 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:56:49,417 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:56:49,434 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:56:49,463 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:56:49,463 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:56:49,463 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:56:49,463 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:56:49,464 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:56:49,464 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:56:49,464 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:56:49,465 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:56:49,485 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 15:56:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 15:56:49,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:49,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:56:49,496 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:56:49,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:56:49,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 15:56:49,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:56:49,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023642269] [2020-07-21 15:56:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:49,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:56:49,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:56:49,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:56:49,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:56:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:56:49,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:56:49,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023642269] [2020-07-21 15:56:49,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:56:49,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:56:49,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250448320] [2020-07-21 15:56:49,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:56:49,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:56:49,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:56:49,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:56:49,811 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 15:56:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:56:49,972 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 15:56:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:56:49,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 15:56:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:56:49,991 INFO L225 Difference]: With dead ends: 44 [2020-07-21 15:56:49,991 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 15:56:49,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:56:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 15:56:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 15:56:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 15:56:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 15:56:50,069 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 15:56:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:56:50,069 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 15:56:50,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:56:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 15:56:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 15:56:50,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:50,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:56:50,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:50,288 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:56:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:56:50,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 15:56:50,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:56:50,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315079784] [2020-07-21 15:56:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:50,337 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:56:50,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:56:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:56:50,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:56:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:56:50,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:56:50,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315079784] [2020-07-21 15:56:50,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:56:50,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:56:50,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255518784] [2020-07-21 15:56:50,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:56:50,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:56:50,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:56:50,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:56:50,410 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 15:56:50,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:56:50,501 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 15:56:50,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:56:50,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 15:56:50,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:56:50,504 INFO L225 Difference]: With dead ends: 36 [2020-07-21 15:56:50,504 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 15:56:50,506 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 [2020-07-21 15:56:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 15:56:50,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 15:56:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 15:56:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 15:56:50,520 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 15:56:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:56:50,521 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 15:56:50,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:56:50,521 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 15:56:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 15:56:50,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:50,523 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] [2020-07-21 15:56:50,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:50,739 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:56:50,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:56:50,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 15:56:50,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:56:50,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379800552] [2020-07-21 15:56:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:50,801 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:56:50,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:56:50,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:56:50,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:56:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:56:50,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:56:51,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:51,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:56:51,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379800552] [2020-07-21 15:56:51,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:56:51,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 15:56:51,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013762947] [2020-07-21 15:56:51,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:56:51,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:56:51,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:56:51,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:56:51,227 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 15:56:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:56:51,357 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 15:56:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:56:51,358 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 15:56:51,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:56:51,360 INFO L225 Difference]: With dead ends: 41 [2020-07-21 15:56:51,360 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 15:56:51,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:56:51,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 15:56:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 15:56:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 15:56:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 15:56:51,380 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 15:56:51,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:56:51,380 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 15:56:51,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:56:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 15:56:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 15:56:51,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:51,383 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] [2020-07-21 15:56:51,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:51,598 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:56:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:56:51,599 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 15:56:51,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:56:51,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992201487] [2020-07-21 15:56:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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) [2020-07-21 15:56:51,646 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:56:51,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:56:51,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:51,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:56:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:56:51,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:56:51,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:51,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:56:51,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992201487] [2020-07-21 15:56:51,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:56:51,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 15:56:51,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323686550] [2020-07-21 15:56:51,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:56:51,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:56:51,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:56:51,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:56:51,931 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 15:56:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:56:52,104 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 15:56:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:56:52,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 15:56:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:56:52,107 INFO L225 Difference]: With dead ends: 46 [2020-07-21 15:56:52,107 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 15:56:52,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:56:52,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 15:56:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 15:56:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 15:56:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 15:56:52,117 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 15:56:52,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:56:52,118 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 15:56:52,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:56:52,118 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 15:56:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 15:56:52,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:52,120 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] [2020-07-21 15:56:52,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:52,332 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:56:52,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:56:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 15:56:52,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:56:52,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089757335] [2020-07-21 15:56:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:52,376 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:56:52,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:56:52,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:56:52,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:56:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 15:56:52,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:56:52,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:52,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:52,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:56:52,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089757335] [2020-07-21 15:56:52,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:56:52,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 15:56:52,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701439283] [2020-07-21 15:56:52,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:56:52,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:56:52,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:56:52,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:56:52,961 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 15:56:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:56:53,178 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 15:56:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:56:53,179 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 15:56:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:56:53,181 INFO L225 Difference]: With dead ends: 51 [2020-07-21 15:56:53,181 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 15:56:53,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:56:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 15:56:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 15:56:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 15:56:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 15:56:53,196 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 15:56:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:56:53,196 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 15:56:53,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:56:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 15:56:53,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 15:56:53,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:53,199 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] [2020-07-21 15:56:53,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:53,408 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:56:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:56:53,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 15:56:53,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:56:53,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460195199] [2020-07-21 15:56:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:53,445 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:56:53,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:56:53,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:56:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:56:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 15:56:53,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:56:53,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:53,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 15:56:53,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460195199] [2020-07-21 15:56:53,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:56:53,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-21 15:56:53,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970769253] [2020-07-21 15:56:53,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:56:53,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:56:53,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:56:53,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:56:53,857 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 15:56:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:56:54,211 INFO L93 Difference]: Finished difference Result 84 states and 136 transitions. [2020-07-21 15:56:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:56:54,212 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 15:56:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:56:54,220 INFO L225 Difference]: With dead ends: 84 [2020-07-21 15:56:54,220 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 15:56:54,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:56:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 15:56:54,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-07-21 15:56:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 15:56:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2020-07-21 15:56:54,259 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 40 [2020-07-21 15:56:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:56:54,260 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 67 transitions. [2020-07-21 15:56:54,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:56:54,260 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 67 transitions. [2020-07-21 15:56:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 15:56:54,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:54,268 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2020-07-21 15:56:54,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:54,482 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:56:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:56:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-07-21 15:56:54,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:56:54,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579927759] [2020-07-21 15:56:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:54,537 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:56:54,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:56:54,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:56:54,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:56:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:56:54,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:56:54,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:54,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:56:54,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579927759] [2020-07-21 15:56:54,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:56:54,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 15:56:54,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822922767] [2020-07-21 15:56:54,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:56:54,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:56:54,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:56:54,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:56:54,988 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand 12 states. [2020-07-21 15:56:55,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:56:55,166 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-07-21 15:56:55,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:56:55,167 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-07-21 15:56:55,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:56:55,169 INFO L225 Difference]: With dead ends: 63 [2020-07-21 15:56:55,169 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 15:56:55,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:56:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 15:56:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-07-21 15:56:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 15:56:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 77 transitions. [2020-07-21 15:56:55,183 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 77 transitions. Word has length 41 [2020-07-21 15:56:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:56:55,184 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 77 transitions. [2020-07-21 15:56:55,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:56:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 77 transitions. [2020-07-21 15:56:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 15:56:55,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:55,187 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 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] [2020-07-21 15:56:55,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:55,396 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:56:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:56:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1291563674, now seen corresponding path program 1 times [2020-07-21 15:56:55,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:56:55,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046671054] [2020-07-21 15:56:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:55,439 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:56:55,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:56:55,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:56:55,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:56:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 15:56:55,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:56:55,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:55,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 15:56:55,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046671054] [2020-07-21 15:56:55,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:56:55,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 15:56:55,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915847499] [2020-07-21 15:56:55,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:56:55,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:56:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:56:55,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:56:55,778 INFO L87 Difference]: Start difference. First operand 51 states and 77 transitions. Second operand 10 states. [2020-07-21 15:56:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:56:55,940 INFO L93 Difference]: Finished difference Result 65 states and 105 transitions. [2020-07-21 15:56:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:56:55,941 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-07-21 15:56:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:56:55,943 INFO L225 Difference]: With dead ends: 65 [2020-07-21 15:56:55,943 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 15:56:55,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:56:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 15:56:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-07-21 15:56:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-21 15:56:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 82 transitions. [2020-07-21 15:56:55,971 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 82 transitions. Word has length 53 [2020-07-21 15:56:55,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:56:55,974 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 82 transitions. [2020-07-21 15:56:55,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:56:55,974 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 82 transitions. [2020-07-21 15:56:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 15:56:55,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:55,977 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:56:56,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:56,179 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:56:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:56:56,179 INFO L82 PathProgramCache]: Analyzing trace with hash 736840020, now seen corresponding path program 2 times [2020-07-21 15:56:56,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:56:56,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503995942] [2020-07-21 15:56:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:56,256 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:56:56,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:56:56,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:56:56,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:56:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 15:56:56,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:56:56,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:56,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:56,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:56,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:57,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:57,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-21 15:56:57,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503995942] [2020-07-21 15:56:57,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:56:57,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 15:56:57,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210648525] [2020-07-21 15:56:57,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:56:57,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:56:57,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:56:57,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:56:57,084 INFO L87 Difference]: Start difference. First operand 53 states and 82 transitions. Second operand 14 states. [2020-07-21 15:56:57,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:56:57,298 INFO L93 Difference]: Finished difference Result 75 states and 134 transitions. [2020-07-21 15:56:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:56:57,303 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 78 [2020-07-21 15:56:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:56:57,305 INFO L225 Difference]: With dead ends: 75 [2020-07-21 15:56:57,305 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 15:56:57,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:56:57,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 15:56:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-07-21 15:56:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 15:56:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 90 transitions. [2020-07-21 15:56:57,323 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 90 transitions. Word has length 78 [2020-07-21 15:56:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:56:57,324 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 90 transitions. [2020-07-21 15:56:57,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:56:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 90 transitions. [2020-07-21 15:56:57,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 15:56:57,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:57,326 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:56:57,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:57,537 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:56:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:56:57,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1583364703, now seen corresponding path program 1 times [2020-07-21 15:56:57,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:56:57,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075893793] [2020-07-21 15:56:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:57,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:56:57,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:56:57,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:56:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:56:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:56:57,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:56:58,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:58,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-21 15:56:58,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075893793] [2020-07-21 15:56:58,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:56:58,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-21 15:56:58,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329271160] [2020-07-21 15:56:58,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:56:58,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:56:58,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:56:58,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:56:58,093 INFO L87 Difference]: Start difference. First operand 56 states and 90 transitions. Second operand 12 states. [2020-07-21 15:56:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:56:58,332 INFO L93 Difference]: Finished difference Result 114 states and 219 transitions. [2020-07-21 15:56:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:56:58,333 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-07-21 15:56:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:56:58,335 INFO L225 Difference]: With dead ends: 114 [2020-07-21 15:56:58,335 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 15:56:58,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:56:58,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 15:56:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-07-21 15:56:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:56:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 101 transitions. [2020-07-21 15:56:58,350 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 101 transitions. Word has length 67 [2020-07-21 15:56:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:56:58,351 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 101 transitions. [2020-07-21 15:56:58,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:56:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 101 transitions. [2020-07-21 15:56:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 15:56:58,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:58,354 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:56:58,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:58,567 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:56:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:56:58,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1763147687, now seen corresponding path program 2 times [2020-07-21 15:56:58,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:56:58,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276645506] [2020-07-21 15:56:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:56:58,616 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:56:58,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:56:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:56:58,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:56:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-21 15:56:58,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:56:59,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:59,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:59,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:59,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:56:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 15:56:59,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276645506] [2020-07-21 15:56:59,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:56:59,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2020-07-21 15:56:59,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160360734] [2020-07-21 15:56:59,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:56:59,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:56:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:56:59,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:56:59,394 INFO L87 Difference]: Start difference. First operand 61 states and 101 transitions. Second operand 17 states. [2020-07-21 15:56:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:56:59,835 INFO L93 Difference]: Finished difference Result 131 states and 252 transitions. [2020-07-21 15:56:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:56:59,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-07-21 15:56:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:56:59,838 INFO L225 Difference]: With dead ends: 131 [2020-07-21 15:56:59,838 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 15:56:59,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:56:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 15:56:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2020-07-21 15:56:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-21 15:56:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 106 transitions. [2020-07-21 15:56:59,854 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 106 transitions. Word has length 68 [2020-07-21 15:56:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:56:59,855 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 106 transitions. [2020-07-21 15:56:59,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:56:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 106 transitions. [2020-07-21 15:56:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 15:56:59,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:56:59,857 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:00,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:00,071 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:00,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1986769418, now seen corresponding path program 1 times [2020-07-21 15:57:00,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:00,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643803864] [2020-07-21 15:57:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:00,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:00,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:00,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:57:00,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 39 proven. 53 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 15:57:00,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:00,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:00,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:00,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:00,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:00,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:00,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:01,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:01,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:01,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 39 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 15:57:01,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643803864] [2020-07-21 15:57:01,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:01,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2020-07-21 15:57:01,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405923188] [2020-07-21 15:57:01,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:57:01,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:01,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:57:01,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:57:01,140 INFO L87 Difference]: Start difference. First operand 68 states and 106 transitions. Second operand 21 states. [2020-07-21 15:57:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:02,098 INFO L93 Difference]: Finished difference Result 186 states and 366 transitions. [2020-07-21 15:57:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 15:57:02,099 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2020-07-21 15:57:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:02,104 INFO L225 Difference]: With dead ends: 186 [2020-07-21 15:57:02,104 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 15:57:02,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 145 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 15:57:02,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 15:57:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2020-07-21 15:57:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-21 15:57:02,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 179 transitions. [2020-07-21 15:57:02,125 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 179 transitions. Word has length 82 [2020-07-21 15:57:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:02,126 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 179 transitions. [2020-07-21 15:57:02,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:57:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 179 transitions. [2020-07-21 15:57:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 15:57:02,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:02,128 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:02,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:02,342 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 3 times [2020-07-21 15:57:02,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:02,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944913713] [2020-07-21 15:57:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:02,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:02,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:02,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:57:02,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 15:57:02,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:02,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:02,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:02,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:03,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-21 15:57:03,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944913713] [2020-07-21 15:57:03,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:03,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 15:57:03,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497293386] [2020-07-21 15:57:03,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:57:03,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:03,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:57:03,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:57:03,045 INFO L87 Difference]: Start difference. First operand 110 states and 179 transitions. Second operand 14 states. [2020-07-21 15:57:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:03,237 INFO L93 Difference]: Finished difference Result 114 states and 182 transitions. [2020-07-21 15:57:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:57:03,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-07-21 15:57:03,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:03,241 INFO L225 Difference]: With dead ends: 114 [2020-07-21 15:57:03,241 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 15:57:03,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:57:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 15:57:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2020-07-21 15:57:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 15:57:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 159 transitions. [2020-07-21 15:57:03,265 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 159 transitions. Word has length 68 [2020-07-21 15:57:03,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:03,266 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 159 transitions. [2020-07-21 15:57:03,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:57:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 159 transitions. [2020-07-21 15:57:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 15:57:03,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:03,268 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:03,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:03,483 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:03,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:03,484 INFO L82 PathProgramCache]: Analyzing trace with hash 918304791, now seen corresponding path program 4 times [2020-07-21 15:57:03,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:03,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269787075] [2020-07-21 15:57:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:03,571 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:03,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:03,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:57:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 33 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-07-21 15:57:03,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:04,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:04,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:04,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:04,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:04,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:04,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-21 15:57:04,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269787075] [2020-07-21 15:57:04,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:04,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2020-07-21 15:57:04,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095340072] [2020-07-21 15:57:04,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 15:57:04,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:04,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 15:57:04,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:57:04,547 INFO L87 Difference]: Start difference. First operand 102 states and 159 transitions. Second operand 19 states. [2020-07-21 15:57:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:05,132 INFO L93 Difference]: Finished difference Result 269 states and 520 transitions. [2020-07-21 15:57:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 15:57:05,138 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-07-21 15:57:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:05,144 INFO L225 Difference]: With dead ends: 269 [2020-07-21 15:57:05,145 INFO L226 Difference]: Without dead ends: 168 [2020-07-21 15:57:05,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-07-21 15:57:05,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-21 15:57:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 144. [2020-07-21 15:57:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-21 15:57:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 247 transitions. [2020-07-21 15:57:05,176 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 247 transitions. Word has length 94 [2020-07-21 15:57:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:05,178 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 247 transitions. [2020-07-21 15:57:05,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 15:57:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 247 transitions. [2020-07-21 15:57:05,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 15:57:05,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:05,182 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 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] [2020-07-21 15:57:05,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:05,395 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:05,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:05,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1676117994, now seen corresponding path program 2 times [2020-07-21 15:57:05,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:05,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617796617] [2020-07-21 15:57:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:05,470 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:05,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:05,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:57:05,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 15:57:05,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:05,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:05,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:05,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:05,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-07-21 15:57:05,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617796617] [2020-07-21 15:57:05,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:05,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 15:57:05,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909137566] [2020-07-21 15:57:05,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:57:05,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:05,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:57:05,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:57:05,977 INFO L87 Difference]: Start difference. First operand 144 states and 247 transitions. Second operand 12 states. [2020-07-21 15:57:06,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:06,168 INFO L93 Difference]: Finished difference Result 167 states and 289 transitions. [2020-07-21 15:57:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:57:06,169 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-07-21 15:57:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:06,173 INFO L225 Difference]: With dead ends: 167 [2020-07-21 15:57:06,173 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 15:57:06,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:57:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 15:57:06,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-07-21 15:57:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-21 15:57:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 272 transitions. [2020-07-21 15:57:06,199 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 272 transitions. Word has length 80 [2020-07-21 15:57:06,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:06,200 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 272 transitions. [2020-07-21 15:57:06,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:57:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 272 transitions. [2020-07-21 15:57:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-21 15:57:06,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:06,206 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:06,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:06,422 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:06,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:06,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2019487259, now seen corresponding path program 3 times [2020-07-21 15:57:06,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:06,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879284869] [2020-07-21 15:57:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:06,506 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:06,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:06,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:57:06,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 177 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-07-21 15:57:06,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:07,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:07,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:07,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:07,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:07,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 71 proven. 141 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-21 15:57:07,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879284869] [2020-07-21 15:57:07,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:07,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2020-07-21 15:57:07,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589835959] [2020-07-21 15:57:07,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:57:07,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:07,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:57:07,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:57:07,949 INFO L87 Difference]: Start difference. First operand 157 states and 272 transitions. Second operand 21 states. [2020-07-21 15:57:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:08,590 INFO L93 Difference]: Finished difference Result 369 states and 701 transitions. [2020-07-21 15:57:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 15:57:08,591 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 120 [2020-07-21 15:57:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:08,598 INFO L225 Difference]: With dead ends: 369 [2020-07-21 15:57:08,599 INFO L226 Difference]: Without dead ends: 218 [2020-07-21 15:57:08,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 213 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 15:57:08,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-21 15:57:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 173. [2020-07-21 15:57:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 15:57:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 306 transitions. [2020-07-21 15:57:08,636 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 306 transitions. Word has length 120 [2020-07-21 15:57:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:08,637 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 306 transitions. [2020-07-21 15:57:08,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:57:08,637 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 306 transitions. [2020-07-21 15:57:08,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-21 15:57:08,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:08,641 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:08,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:08,856 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:08,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash -923530611, now seen corresponding path program 4 times [2020-07-21 15:57:08,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:08,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370750114] [2020-07-21 15:57:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:08,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:08,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:08,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:57:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-07-21 15:57:09,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:09,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:09,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:09,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:09,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 55 proven. 16 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-07-21 15:57:09,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370750114] [2020-07-21 15:57:09,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:09,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 15:57:09,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476788435] [2020-07-21 15:57:09,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:57:09,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:09,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:57:09,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:57:09,428 INFO L87 Difference]: Start difference. First operand 173 states and 306 transitions. Second operand 12 states. [2020-07-21 15:57:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:09,608 INFO L93 Difference]: Finished difference Result 191 states and 349 transitions. [2020-07-21 15:57:09,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:57:09,609 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 92 [2020-07-21 15:57:09,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:09,612 INFO L225 Difference]: With dead ends: 191 [2020-07-21 15:57:09,612 INFO L226 Difference]: Without dead ends: 187 [2020-07-21 15:57:09,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 169 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:57:09,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-21 15:57:09,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 176. [2020-07-21 15:57:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-21 15:57:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 316 transitions. [2020-07-21 15:57:09,631 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 316 transitions. Word has length 92 [2020-07-21 15:57:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:09,632 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 316 transitions. [2020-07-21 15:57:09,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:57:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 316 transitions. [2020-07-21 15:57:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-21 15:57:09,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:09,635 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:09,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:09,849 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:09,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1156827333, now seen corresponding path program 2 times [2020-07-21 15:57:09,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:09,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692683775] [2020-07-21 15:57:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:09,957 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:09,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:57:09,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 21 proven. 119 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 15:57:10,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:10,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:10,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:10,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:11,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:11,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-21 15:57:11,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692683775] [2020-07-21 15:57:11,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:11,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 15:57:11,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39152471] [2020-07-21 15:57:11,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 15:57:11,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:11,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 15:57:11,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:57:11,053 INFO L87 Difference]: Start difference. First operand 176 states and 316 transitions. Second operand 16 states. [2020-07-21 15:57:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:11,280 INFO L93 Difference]: Finished difference Result 206 states and 384 transitions. [2020-07-21 15:57:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:57:11,281 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 118 [2020-07-21 15:57:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:11,284 INFO L225 Difference]: With dead ends: 206 [2020-07-21 15:57:11,285 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 15:57:11,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 212 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:57:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 15:57:11,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 186. [2020-07-21 15:57:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-07-21 15:57:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 342 transitions. [2020-07-21 15:57:11,304 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 342 transitions. Word has length 118 [2020-07-21 15:57:11,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:11,304 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 342 transitions. [2020-07-21 15:57:11,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 15:57:11,305 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 342 transitions. [2020-07-21 15:57:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-21 15:57:11,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:11,308 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:11,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:11,522 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:11,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:11,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1781345224, now seen corresponding path program 5 times [2020-07-21 15:57:11,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:11,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240080966] [2020-07-21 15:57:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:11,625 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:11,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:11,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:57:11,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 359 proven. 31 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-21 15:57:11,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:12,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:12,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:12,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:12,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:12,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 60 proven. 213 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 15:57:12,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240080966] [2020-07-21 15:57:12,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:12,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2020-07-21 15:57:12,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857792471] [2020-07-21 15:57:12,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:57:12,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:12,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:57:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:57:12,914 INFO L87 Difference]: Start difference. First operand 186 states and 342 transitions. Second operand 17 states. [2020-07-21 15:57:13,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:13,317 INFO L93 Difference]: Finished difference Result 376 states and 717 transitions. [2020-07-21 15:57:13,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:57:13,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 161 [2020-07-21 15:57:13,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:13,322 INFO L225 Difference]: With dead ends: 376 [2020-07-21 15:57:13,322 INFO L226 Difference]: Without dead ends: 192 [2020-07-21 15:57:13,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 295 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:57:13,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-21 15:57:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-07-21 15:57:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-21 15:57:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 336 transitions. [2020-07-21 15:57:13,345 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 336 transitions. Word has length 161 [2020-07-21 15:57:13,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:13,348 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 336 transitions. [2020-07-21 15:57:13,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:57:13,349 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 336 transitions. [2020-07-21 15:57:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-07-21 15:57:13,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:13,353 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:13,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:13,568 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1791351881, now seen corresponding path program 6 times [2020-07-21 15:57:13,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:13,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233819886] [2020-07-21 15:57:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:13,678 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:13,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:13,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:57:13,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 150 proven. 236 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 15:57:13,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:14,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:14,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:14,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:14,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:15,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:15,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:15,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:15,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:15,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 150 proven. 246 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-07-21 15:57:15,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233819886] [2020-07-21 15:57:15,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:15,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 25 [2020-07-21 15:57:15,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880810159] [2020-07-21 15:57:15,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 15:57:15,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:15,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 15:57:15,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-07-21 15:57:15,584 INFO L87 Difference]: Start difference. First operand 190 states and 336 transitions. Second operand 25 states. [2020-07-21 15:57:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:16,809 INFO L93 Difference]: Finished difference Result 462 states and 962 transitions. [2020-07-21 15:57:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 15:57:16,813 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2020-07-21 15:57:16,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:16,820 INFO L225 Difference]: With dead ends: 462 [2020-07-21 15:57:16,820 INFO L226 Difference]: Without dead ends: 276 [2020-07-21 15:57:16,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 310 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2020-07-21 15:57:16,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-07-21 15:57:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 248. [2020-07-21 15:57:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-07-21 15:57:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 470 transitions. [2020-07-21 15:57:16,852 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 470 transitions. Word has length 174 [2020-07-21 15:57:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:16,853 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 470 transitions. [2020-07-21 15:57:16,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 15:57:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 470 transitions. [2020-07-21 15:57:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 15:57:16,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:16,857 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:17,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:17,072 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:17,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1543923031, now seen corresponding path program 7 times [2020-07-21 15:57:17,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:17,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079278709] [2020-07-21 15:57:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:17,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:17,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:57:17,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 78 proven. 127 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-21 15:57:17,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:17,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:18,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:18,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:18,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:18,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 78 proven. 133 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 15:57:18,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079278709] [2020-07-21 15:57:18,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:18,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 21 [2020-07-21 15:57:18,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489866085] [2020-07-21 15:57:18,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:57:18,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:18,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:57:18,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:57:18,748 INFO L87 Difference]: Start difference. First operand 248 states and 470 transitions. Second operand 21 states. [2020-07-21 15:57:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:19,528 INFO L93 Difference]: Finished difference Result 502 states and 1013 transitions. [2020-07-21 15:57:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 15:57:19,529 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 121 [2020-07-21 15:57:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:19,533 INFO L225 Difference]: With dead ends: 502 [2020-07-21 15:57:19,534 INFO L226 Difference]: Without dead ends: 258 [2020-07-21 15:57:19,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 213 SyntacticMatches, 15 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 15:57:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-21 15:57:19,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 231. [2020-07-21 15:57:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-21 15:57:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 407 transitions. [2020-07-21 15:57:19,565 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 407 transitions. Word has length 121 [2020-07-21 15:57:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:19,566 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 407 transitions. [2020-07-21 15:57:19,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:57:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 407 transitions. [2020-07-21 15:57:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 15:57:19,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:19,570 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:19,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:19,786 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:19,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:19,787 INFO L82 PathProgramCache]: Analyzing trace with hash -77183713, now seen corresponding path program 8 times [2020-07-21 15:57:19,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:19,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883059122] [2020-07-21 15:57:19,790 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:20,035 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:20,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:20,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:57:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2020-07-21 15:57:20,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:20,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:20,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:21,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:21,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:21,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:21,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:21,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:21,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 21 proven. 136 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-21 15:57:21,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883059122] [2020-07-21 15:57:21,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:21,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 15:57:21,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849072822] [2020-07-21 15:57:21,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 15:57:21,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:21,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 15:57:21,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:57:21,226 INFO L87 Difference]: Start difference. First operand 231 states and 407 transitions. Second operand 16 states. [2020-07-21 15:57:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:21,504 INFO L93 Difference]: Finished difference Result 240 states and 425 transitions. [2020-07-21 15:57:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:57:21,507 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 121 [2020-07-21 15:57:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:21,512 INFO L225 Difference]: With dead ends: 240 [2020-07-21 15:57:21,513 INFO L226 Difference]: Without dead ends: 236 [2020-07-21 15:57:21,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 218 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:57:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-21 15:57:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2020-07-21 15:57:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 15:57:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 414 transitions. [2020-07-21 15:57:21,536 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 414 transitions. Word has length 121 [2020-07-21 15:57:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:21,537 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 414 transitions. [2020-07-21 15:57:21,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 15:57:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 414 transitions. [2020-07-21 15:57:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-21 15:57:21,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:21,540 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:21,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:21,756 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:21,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1996526584, now seen corresponding path program 3 times [2020-07-21 15:57:21,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:21,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099740408] [2020-07-21 15:57:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:21,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:21,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:21,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:57:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 48 proven. 105 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-21 15:57:21,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:22,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:22,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:22,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:22,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:22,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:22,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:22,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 48 proven. 110 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-07-21 15:57:22,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099740408] [2020-07-21 15:57:22,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:22,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 15:57:22,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047803442] [2020-07-21 15:57:22,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:57:22,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:22,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:57:22,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:57:22,722 INFO L87 Difference]: Start difference. First operand 233 states and 414 transitions. Second operand 14 states. [2020-07-21 15:57:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:22,919 INFO L93 Difference]: Finished difference Result 292 states and 577 transitions. [2020-07-21 15:57:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:57:22,919 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2020-07-21 15:57:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:22,925 INFO L225 Difference]: With dead ends: 292 [2020-07-21 15:57:22,925 INFO L226 Difference]: Without dead ends: 288 [2020-07-21 15:57:22,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 246 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:57:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-07-21 15:57:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 244. [2020-07-21 15:57:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-21 15:57:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 435 transitions. [2020-07-21 15:57:22,955 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 435 transitions. Word has length 133 [2020-07-21 15:57:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:22,957 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 435 transitions. [2020-07-21 15:57:22,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:57:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 435 transitions. [2020-07-21 15:57:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-21 15:57:22,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:22,963 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:23,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:23,180 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:23,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2023571201, now seen corresponding path program 4 times [2020-07-21 15:57:23,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:23,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689422307] [2020-07-21 15:57:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:23,323 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:23,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:57:23,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 77 proven. 92 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2020-07-21 15:57:23,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:23,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:23,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:24,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:24,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:24,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:24,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2020-07-21 15:57:24,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689422307] [2020-07-21 15:57:24,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:24,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 15:57:24,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812429077] [2020-07-21 15:57:24,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:57:24,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:24,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:57:24,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:57:24,245 INFO L87 Difference]: Start difference. First operand 244 states and 435 transitions. Second operand 14 states. [2020-07-21 15:57:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:24,430 INFO L93 Difference]: Finished difference Result 272 states and 510 transitions. [2020-07-21 15:57:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:57:24,431 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 145 [2020-07-21 15:57:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:24,436 INFO L225 Difference]: With dead ends: 272 [2020-07-21 15:57:24,436 INFO L226 Difference]: Without dead ends: 268 [2020-07-21 15:57:24,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 270 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:57:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-07-21 15:57:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 244. [2020-07-21 15:57:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-21 15:57:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 435 transitions. [2020-07-21 15:57:24,464 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 435 transitions. Word has length 145 [2020-07-21 15:57:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:24,465 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 435 transitions. [2020-07-21 15:57:24,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:57:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 435 transitions. [2020-07-21 15:57:24,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-21 15:57:24,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:24,469 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:24,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:24,683 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash -146170438, now seen corresponding path program 5 times [2020-07-21 15:57:24,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:24,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974407818] [2020-07-21 15:57:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:24,845 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:24,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:57:24,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 139 proven. 46 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2020-07-21 15:57:24,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:25,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:25,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:25,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:25,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 141 proven. 49 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-07-21 15:57:25,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974407818] [2020-07-21 15:57:25,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:25,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 15:57:25,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103167865] [2020-07-21 15:57:25,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:57:25,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:25,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:57:25,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:57:25,889 INFO L87 Difference]: Start difference. First operand 244 states and 435 transitions. Second operand 14 states. [2020-07-21 15:57:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:26,109 INFO L93 Difference]: Finished difference Result 254 states and 453 transitions. [2020-07-21 15:57:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:57:26,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 157 [2020-07-21 15:57:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:26,115 INFO L225 Difference]: With dead ends: 254 [2020-07-21 15:57:26,115 INFO L226 Difference]: Without dead ends: 250 [2020-07-21 15:57:26,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 295 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:57:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-21 15:57:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 244. [2020-07-21 15:57:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-21 15:57:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 435 transitions. [2020-07-21 15:57:26,144 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 435 transitions. Word has length 157 [2020-07-21 15:57:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:26,145 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 435 transitions. [2020-07-21 15:57:26,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:57:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 435 transitions. [2020-07-21 15:57:26,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-07-21 15:57:26,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:26,151 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:26,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:26,366 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:26,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1066126256, now seen corresponding path program 9 times [2020-07-21 15:57:26,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:26,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037438107] [2020-07-21 15:57:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:26,521 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:26,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:26,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:57:26,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 369 proven. 86 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-21 15:57:26,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:27,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:27,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:27,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:27,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:27,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:28,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:28,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 98 proven. 199 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-21 15:57:28,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037438107] [2020-07-21 15:57:28,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:28,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 19 [2020-07-21 15:57:28,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093543700] [2020-07-21 15:57:28,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 15:57:28,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:28,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 15:57:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:57:28,212 INFO L87 Difference]: Start difference. First operand 244 states and 435 transitions. Second operand 19 states. [2020-07-21 15:57:28,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:28,800 INFO L93 Difference]: Finished difference Result 515 states and 1018 transitions. [2020-07-21 15:57:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 15:57:28,801 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 159 [2020-07-21 15:57:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:28,806 INFO L225 Difference]: With dead ends: 515 [2020-07-21 15:57:28,806 INFO L226 Difference]: Without dead ends: 273 [2020-07-21 15:57:28,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 287 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2020-07-21 15:57:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-07-21 15:57:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 236. [2020-07-21 15:57:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 15:57:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 416 transitions. [2020-07-21 15:57:28,836 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 416 transitions. Word has length 159 [2020-07-21 15:57:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:28,836 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 416 transitions. [2020-07-21 15:57:28,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 15:57:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 416 transitions. [2020-07-21 15:57:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-07-21 15:57:28,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:28,840 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:29,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:29,054 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:29,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:29,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1756017832, now seen corresponding path program 10 times [2020-07-21 15:57:29,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:29,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097006412] [2020-07-21 15:57:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:29,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:29,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:29,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:57:29,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 44 proven. 208 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-07-21 15:57:29,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:30,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:30,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:30,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:30,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:30,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:30,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 44 proven. 222 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2020-07-21 15:57:30,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097006412] [2020-07-21 15:57:30,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:30,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 15:57:30,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600792790] [2020-07-21 15:57:30,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 15:57:30,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:30,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 15:57:30,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:57:30,935 INFO L87 Difference]: Start difference. First operand 236 states and 416 transitions. Second operand 18 states. [2020-07-21 15:57:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:31,238 INFO L93 Difference]: Finished difference Result 256 states and 458 transitions. [2020-07-21 15:57:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:57:31,239 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 158 [2020-07-21 15:57:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:31,242 INFO L225 Difference]: With dead ends: 256 [2020-07-21 15:57:31,243 INFO L226 Difference]: Without dead ends: 252 [2020-07-21 15:57:31,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 287 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 15:57:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-21 15:57:31,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 231. [2020-07-21 15:57:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-21 15:57:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 405 transitions. [2020-07-21 15:57:31,265 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 405 transitions. Word has length 158 [2020-07-21 15:57:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:31,266 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 405 transitions. [2020-07-21 15:57:31,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 15:57:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 405 transitions. [2020-07-21 15:57:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-07-21 15:57:31,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:31,270 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 9, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:31,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:31,485 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:31,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1102006884, now seen corresponding path program 11 times [2020-07-21 15:57:31,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:31,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212179746] [2020-07-21 15:57:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:31,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:31,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:31,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 15:57:31,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 168 proven. 206 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-07-21 15:57:31,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:32,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:32,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:33,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:33,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:33,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:33,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:33,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:33,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:33,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:34,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:34,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:34,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:34,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 168 proven. 220 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-07-21 15:57:34,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212179746] [2020-07-21 15:57:34,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:34,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-21 15:57:34,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724357154] [2020-07-21 15:57:34,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 15:57:34,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 15:57:34,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-07-21 15:57:34,195 INFO L87 Difference]: Start difference. First operand 231 states and 405 transitions. Second operand 25 states. [2020-07-21 15:57:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:35,236 INFO L93 Difference]: Finished difference Result 482 states and 922 transitions. [2020-07-21 15:57:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 15:57:35,237 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 162 [2020-07-21 15:57:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:35,243 INFO L225 Difference]: With dead ends: 482 [2020-07-21 15:57:35,243 INFO L226 Difference]: Without dead ends: 255 [2020-07-21 15:57:35,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 281 SyntacticMatches, 19 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 15:57:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-21 15:57:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 233. [2020-07-21 15:57:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 15:57:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 378 transitions. [2020-07-21 15:57:35,274 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 378 transitions. Word has length 162 [2020-07-21 15:57:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:35,274 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 378 transitions. [2020-07-21 15:57:35,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 15:57:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 378 transitions. [2020-07-21 15:57:35,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 15:57:35,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:35,281 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 12, 11, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:35,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:35,523 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:35,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:35,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1402399200, now seen corresponding path program 12 times [2020-07-21 15:57:35,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:35,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289244231] [2020-07-21 15:57:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:35,717 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:35,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:35,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:57:35,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 817 proven. 211 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-07-21 15:57:35,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:37,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:37,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:37,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:37,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:37,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:37,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:37,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:37,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:37,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:37,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 170 proven. 431 refuted. 0 times theorem prover too weak. 932 trivial. 0 not checked. [2020-07-21 15:57:38,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289244231] [2020-07-21 15:57:38,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:38,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 21 [2020-07-21 15:57:38,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715641801] [2020-07-21 15:57:38,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:57:38,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:57:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:57:38,076 INFO L87 Difference]: Start difference. First operand 233 states and 378 transitions. Second operand 21 states. [2020-07-21 15:57:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:39,027 INFO L93 Difference]: Finished difference Result 540 states and 940 transitions. [2020-07-21 15:57:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 15:57:39,028 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 240 [2020-07-21 15:57:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:39,032 INFO L225 Difference]: With dead ends: 540 [2020-07-21 15:57:39,032 INFO L226 Difference]: Without dead ends: 261 [2020-07-21 15:57:39,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 445 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:57:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-21 15:57:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 221. [2020-07-21 15:57:39,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 15:57:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 349 transitions. [2020-07-21 15:57:39,051 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 349 transitions. Word has length 240 [2020-07-21 15:57:39,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:39,052 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 349 transitions. [2020-07-21 15:57:39,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:57:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 349 transitions. [2020-07-21 15:57:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 15:57:39,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:39,055 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 13, 13, 10, 10, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:39,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:39,269 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:39,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:39,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2099788343, now seen corresponding path program 13 times [2020-07-21 15:57:39,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:39,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019693651] [2020-07-21 15:57:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:39,493 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:39,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:39,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:57:39,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 53 proven. 312 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2020-07-21 15:57:39,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:40,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:40,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:41,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:41,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:41,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:41,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:41,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:41,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:41,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 53 proven. 328 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2020-07-21 15:57:41,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019693651] [2020-07-21 15:57:41,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:41,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 15:57:41,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837986660] [2020-07-21 15:57:41,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 15:57:41,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:41,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 15:57:41,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:57:41,422 INFO L87 Difference]: Start difference. First operand 221 states and 349 transitions. Second operand 18 states. [2020-07-21 15:57:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:41,687 INFO L93 Difference]: Finished difference Result 236 states and 369 transitions. [2020-07-21 15:57:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:57:41,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 201 [2020-07-21 15:57:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:41,692 INFO L225 Difference]: With dead ends: 236 [2020-07-21 15:57:41,692 INFO L226 Difference]: Without dead ends: 232 [2020-07-21 15:57:41,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 373 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 15:57:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-21 15:57:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 226. [2020-07-21 15:57:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-07-21 15:57:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 357 transitions. [2020-07-21 15:57:41,710 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 357 transitions. Word has length 201 [2020-07-21 15:57:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:41,711 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 357 transitions. [2020-07-21 15:57:41,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 15:57:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 357 transitions. [2020-07-21 15:57:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 15:57:41,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:41,715 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:41,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:41,929 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:41,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:41,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1803358882, now seen corresponding path program 14 times [2020-07-21 15:57:41,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:41,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443774664] [2020-07-21 15:57:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:42,161 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:42,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:42,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:57:42,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 79 proven. 212 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-07-21 15:57:42,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:43,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:43,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:43,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:43,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:43,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:43,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:43,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 79 proven. 222 refuted. 0 times theorem prover too weak. 617 trivial. 0 not checked. [2020-07-21 15:57:43,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443774664] [2020-07-21 15:57:43,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:43,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 15:57:43,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872027212] [2020-07-21 15:57:43,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 15:57:43,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:43,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 15:57:43,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:57:43,589 INFO L87 Difference]: Start difference. First operand 226 states and 357 transitions. Second operand 16 states. [2020-07-21 15:57:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:43,871 INFO L93 Difference]: Finished difference Result 268 states and 442 transitions. [2020-07-21 15:57:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:57:43,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 189 [2020-07-21 15:57:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:43,877 INFO L225 Difference]: With dead ends: 268 [2020-07-21 15:57:43,877 INFO L226 Difference]: Without dead ends: 264 [2020-07-21 15:57:43,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 353 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:57:43,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-21 15:57:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 236. [2020-07-21 15:57:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 15:57:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 384 transitions. [2020-07-21 15:57:43,903 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 384 transitions. Word has length 189 [2020-07-21 15:57:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:43,904 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 384 transitions. [2020-07-21 15:57:43,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 15:57:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 384 transitions. [2020-07-21 15:57:43,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 15:57:43,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:43,909 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:44,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:44,123 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:44,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:44,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1711365749, now seen corresponding path program 15 times [2020-07-21 15:57:44,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:44,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120586851] [2020-07-21 15:57:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:44,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:44,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:44,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:57:44,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 111 proven. 200 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-07-21 15:57:44,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:45,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:45,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:45,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:45,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:45,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:45,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 111 proven. 210 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2020-07-21 15:57:45,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120586851] [2020-07-21 15:57:45,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:45,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 15:57:45,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019263227] [2020-07-21 15:57:45,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 15:57:45,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:45,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 15:57:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:57:45,911 INFO L87 Difference]: Start difference. First operand 236 states and 384 transitions. Second operand 16 states. [2020-07-21 15:57:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:46,182 INFO L93 Difference]: Finished difference Result 296 states and 548 transitions. [2020-07-21 15:57:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:57:46,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 201 [2020-07-21 15:57:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:46,188 INFO L225 Difference]: With dead ends: 296 [2020-07-21 15:57:46,188 INFO L226 Difference]: Without dead ends: 292 [2020-07-21 15:57:46,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 377 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:57:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-21 15:57:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 236. [2020-07-21 15:57:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 15:57:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 384 transitions. [2020-07-21 15:57:46,227 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 384 transitions. Word has length 201 [2020-07-21 15:57:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:46,228 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 384 transitions. [2020-07-21 15:57:46,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 15:57:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 384 transitions. [2020-07-21 15:57:46,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-07-21 15:57:46,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:46,232 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 11, 11, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:46,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:46,446 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:46,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1338682891, now seen corresponding path program 16 times [2020-07-21 15:57:46,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:46,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975963404] [2020-07-21 15:57:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:46,689 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:46,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:46,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:57:46,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 792 proven. 124 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2020-07-21 15:57:46,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:48,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:48,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:48,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:48,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:48,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:48,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:49,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:49,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:49,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 167 proven. 416 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2020-07-21 15:57:49,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975963404] [2020-07-21 15:57:49,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:49,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 21 [2020-07-21 15:57:49,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684315258] [2020-07-21 15:57:49,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:57:49,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:49,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:57:49,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:57:49,206 INFO L87 Difference]: Start difference. First operand 236 states and 384 transitions. Second operand 21 states. [2020-07-21 15:57:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:50,025 INFO L93 Difference]: Finished difference Result 490 states and 832 transitions. [2020-07-21 15:57:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 15:57:50,026 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 227 [2020-07-21 15:57:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:50,030 INFO L225 Difference]: With dead ends: 490 [2020-07-21 15:57:50,031 INFO L226 Difference]: Without dead ends: 245 [2020-07-21 15:57:50,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 419 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 15:57:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-21 15:57:50,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 207. [2020-07-21 15:57:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-21 15:57:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 326 transitions. [2020-07-21 15:57:50,051 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 326 transitions. Word has length 227 [2020-07-21 15:57:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:50,051 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 326 transitions. [2020-07-21 15:57:50,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:57:50,052 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 326 transitions. [2020-07-21 15:57:50,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-07-21 15:57:50,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:50,055 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 15, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:50,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:50,269 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:50,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:50,270 INFO L82 PathProgramCache]: Analyzing trace with hash 638865236, now seen corresponding path program 6 times [2020-07-21 15:57:50,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:50,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104498828] [2020-07-21 15:57:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:50,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:50,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:57:50,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1534 backedges. 161 proven. 152 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2020-07-21 15:57:50,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:51,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:51,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:51,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:51,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:51,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:51,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:51,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1534 backedges. 161 proven. 157 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2020-07-21 15:57:51,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104498828] [2020-07-21 15:57:51,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:51,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 15:57:51,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813192950] [2020-07-21 15:57:51,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:57:51,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:51,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:57:51,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:57:51,771 INFO L87 Difference]: Start difference. First operand 207 states and 326 transitions. Second operand 14 states. [2020-07-21 15:57:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:51,995 INFO L93 Difference]: Finished difference Result 252 states and 436 transitions. [2020-07-21 15:57:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:57:51,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 237 [2020-07-21 15:57:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:52,000 INFO L225 Difference]: With dead ends: 252 [2020-07-21 15:57:52,001 INFO L226 Difference]: Without dead ends: 248 [2020-07-21 15:57:52,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 454 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:57:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-07-21 15:57:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 213. [2020-07-21 15:57:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-07-21 15:57:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 344 transitions. [2020-07-21 15:57:52,018 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 344 transitions. Word has length 237 [2020-07-21 15:57:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:52,019 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 344 transitions. [2020-07-21 15:57:52,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:57:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 344 transitions. [2020-07-21 15:57:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-07-21 15:57:52,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:52,024 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 17, 16, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:52,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:52,237 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:52,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1572305068, now seen corresponding path program 5 times [2020-07-21 15:57:52,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:52,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732754658] [2020-07-21 15:57:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:52,571 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:57:52,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:52,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:57:52,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 440 proven. 904 refuted. 0 times theorem prover too weak. 3031 trivial. 0 not checked. [2020-07-21 15:57:52,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:54,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:54,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:54,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:54,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:54,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:54,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:55,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:56,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:56,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:56,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:56,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:56,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 442 proven. 921 refuted. 0 times theorem prover too weak. 3012 trivial. 0 not checked. [2020-07-21 15:57:56,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732754658] [2020-07-21 15:57:56,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:57:56,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 15:57:56,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410087283] [2020-07-21 15:57:56,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 15:57:56,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:57:56,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 15:57:56,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-07-21 15:57:56,803 INFO L87 Difference]: Start difference. First operand 213 states and 344 transitions. Second operand 27 states. [2020-07-21 15:57:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:57:58,234 INFO L93 Difference]: Finished difference Result 494 states and 906 transitions. [2020-07-21 15:57:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-21 15:57:58,235 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 392 [2020-07-21 15:57:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:57:58,240 INFO L225 Difference]: With dead ends: 494 [2020-07-21 15:57:58,240 INFO L226 Difference]: Without dead ends: 283 [2020-07-21 15:57:58,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 738 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=343, Invalid=1727, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 15:57:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-21 15:57:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 235. [2020-07-21 15:57:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-07-21 15:57:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 376 transitions. [2020-07-21 15:57:58,264 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 376 transitions. Word has length 392 [2020-07-21 15:57:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:57:58,264 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 376 transitions. [2020-07-21 15:57:58,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 15:57:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 376 transitions. [2020-07-21 15:57:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-07-21 15:57:58,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:57:58,267 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:57:58,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:57:58,482 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:57:58,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:57:58,483 INFO L82 PathProgramCache]: Analyzing trace with hash 120952594, now seen corresponding path program 17 times [2020-07-21 15:57:58,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:57:58,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566253642] [2020-07-21 15:57:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:57:58,836 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:57:58,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:57:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:57:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:57:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 301 proven. 76 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2020-07-21 15:57:59,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:57:59,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:59,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:00,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:00,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:00,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:00,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 303 proven. 84 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2020-07-21 15:58:00,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566253642] [2020-07-21 15:58:00,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:58:00,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 15:58:00,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330242399] [2020-07-21 15:58:00,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 15:58:00,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:58:00,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 15:58:00,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:58:00,548 INFO L87 Difference]: Start difference. First operand 235 states and 376 transitions. Second operand 16 states. [2020-07-21 15:58:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:58:00,806 INFO L93 Difference]: Finished difference Result 247 states and 395 transitions. [2020-07-21 15:58:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:58:00,807 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 237 [2020-07-21 15:58:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:58:00,810 INFO L225 Difference]: With dead ends: 247 [2020-07-21 15:58:00,810 INFO L226 Difference]: Without dead ends: 243 [2020-07-21 15:58:00,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 450 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:58:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-21 15:58:00,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 222. [2020-07-21 15:58:00,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-21 15:58:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 347 transitions. [2020-07-21 15:58:00,826 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 347 transitions. Word has length 237 [2020-07-21 15:58:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:58:00,827 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 347 transitions. [2020-07-21 15:58:00,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 15:58:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 347 transitions. [2020-07-21 15:58:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-07-21 15:58:00,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:58:00,829 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:58:01,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:01,043 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:58:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:58:01,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1057498309, now seen corresponding path program 7 times [2020-07-21 15:58:01,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:58:01,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679996379] [2020-07-21 15:58:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:58:01,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:58:01,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:58:01,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:58:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:58:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 86 proven. 445 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-07-21 15:58:01,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:58:03,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:03,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:03,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:04,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:04,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:04,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:04,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 86 proven. 466 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2020-07-21 15:58:04,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679996379] [2020-07-21 15:58:04,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:58:04,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 15:58:04,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558246546] [2020-07-21 15:58:04,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 15:58:04,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:58:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 15:58:04,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 15:58:04,314 INFO L87 Difference]: Start difference. First operand 222 states and 347 transitions. Second operand 20 states. [2020-07-21 15:58:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:58:04,690 INFO L93 Difference]: Finished difference Result 232 states and 361 transitions. [2020-07-21 15:58:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 15:58:04,691 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 249 [2020-07-21 15:58:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:58:04,694 INFO L225 Difference]: With dead ends: 232 [2020-07-21 15:58:04,695 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 15:58:04,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 466 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 15:58:04,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 15:58:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 200. [2020-07-21 15:58:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-21 15:58:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 305 transitions. [2020-07-21 15:58:04,709 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 305 transitions. Word has length 249 [2020-07-21 15:58:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:58:04,710 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 305 transitions. [2020-07-21 15:58:04,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 15:58:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 305 transitions. [2020-07-21 15:58:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 15:58:04,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:58:04,715 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 29, 29, 26, 25, 21, 21, 21, 21, 21, 21, 21, 16, 14, 14, 14, 14, 14, 14, 14, 12, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:58:04,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:04,929 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:58:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:58:04,930 INFO L82 PathProgramCache]: Analyzing trace with hash 308915838, now seen corresponding path program 18 times [2020-07-21 15:58:04,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:58:04,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250374221] [2020-07-21 15:58:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:58:05,307 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:58:05,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:58:05,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:58:05,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:58:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6897 backedges. 3813 proven. 353 refuted. 0 times theorem prover too weak. 2731 trivial. 0 not checked. [2020-07-21 15:58:05,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:58:08,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:08,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:08,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:08,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:08,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:08,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:08,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:08,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:09,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:09,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:09,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:09,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:09,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6897 backedges. 395 proven. 1180 refuted. 0 times theorem prover too weak. 5322 trivial. 0 not checked. [2020-07-21 15:58:09,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250374221] [2020-07-21 15:58:09,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:58:09,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-21 15:58:09,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157086580] [2020-07-21 15:58:09,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 15:58:09,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:58:09,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 15:58:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:58:09,322 INFO L87 Difference]: Start difference. First operand 200 states and 305 transitions. Second operand 23 states. [2020-07-21 15:58:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:58:10,475 INFO L93 Difference]: Finished difference Result 486 states and 832 transitions. [2020-07-21 15:58:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 15:58:10,476 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 484 [2020-07-21 15:58:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:58:10,480 INFO L225 Difference]: With dead ends: 486 [2020-07-21 15:58:10,480 INFO L226 Difference]: Without dead ends: 276 [2020-07-21 15:58:10,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 929 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 15:58:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-07-21 15:58:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 238. [2020-07-21 15:58:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-21 15:58:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 386 transitions. [2020-07-21 15:58:10,499 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 386 transitions. Word has length 484 [2020-07-21 15:58:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:58:10,499 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 386 transitions. [2020-07-21 15:58:10,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 15:58:10,499 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 386 transitions. [2020-07-21 15:58:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 15:58:10,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:58:10,503 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 17, 16, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 7, 7, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:58:10,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:10,716 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:58:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:58:10,717 INFO L82 PathProgramCache]: Analyzing trace with hash 854077344, now seen corresponding path program 19 times [2020-07-21 15:58:10,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:58:10,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245251743] [2020-07-21 15:58:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:58:11,060 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:58:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:58:11,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:58:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:58:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2856 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-07-21 15:58:11,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:58:13,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:14,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:14,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:14,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:15,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:15,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:15,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:15,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:15,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:15,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:15,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:15,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2856 backedges. 358 proven. 781 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-07-21 15:58:15,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245251743] [2020-07-21 15:58:15,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:58:15,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 15:58:15,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097838563] [2020-07-21 15:58:15,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 15:58:15,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:58:15,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 15:58:15,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-07-21 15:58:15,678 INFO L87 Difference]: Start difference. First operand 238 states and 386 transitions. Second operand 27 states. [2020-07-21 15:58:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:58:17,285 INFO L93 Difference]: Finished difference Result 581 states and 1036 transitions. [2020-07-21 15:58:17,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 15:58:17,288 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 322 [2020-07-21 15:58:17,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:58:17,293 INFO L225 Difference]: With dead ends: 581 [2020-07-21 15:58:17,293 INFO L226 Difference]: Without dead ends: 346 [2020-07-21 15:58:17,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 597 SyntacticMatches, 21 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=2042, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 15:58:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-07-21 15:58:17,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 249. [2020-07-21 15:58:17,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-07-21 15:58:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 400 transitions. [2020-07-21 15:58:17,314 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 400 transitions. Word has length 322 [2020-07-21 15:58:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:58:17,314 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 400 transitions. [2020-07-21 15:58:17,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 15:58:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 400 transitions. [2020-07-21 15:58:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 15:58:17,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:58:17,319 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 26, 25, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 12, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:58:17,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:17,535 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:58:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:58:17,536 INFO L82 PathProgramCache]: Analyzing trace with hash -382555246, now seen corresponding path program 20 times [2020-07-21 15:58:17,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:58:17,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725316134] [2020-07-21 15:58:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:58:17,935 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:58:17,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:58:17,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:58:17,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:58:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6713 backedges. 3758 proven. 340 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2020-07-21 15:58:18,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:58:20,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:20,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:20,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:20,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:20,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:20,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:21,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:21,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:21,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:21,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:21,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6713 backedges. 449 proven. 1110 refuted. 0 times theorem prover too weak. 5154 trivial. 0 not checked. [2020-07-21 15:58:21,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725316134] [2020-07-21 15:58:21,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:58:21,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-21 15:58:21,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750809412] [2020-07-21 15:58:21,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 15:58:21,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:58:21,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 15:58:21,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:58:21,965 INFO L87 Difference]: Start difference. First operand 249 states and 400 transitions. Second operand 23 states. [2020-07-21 15:58:23,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:58:23,092 INFO L93 Difference]: Finished difference Result 651 states and 1162 transitions. [2020-07-21 15:58:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 15:58:23,093 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 484 [2020-07-21 15:58:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:58:23,098 INFO L225 Difference]: With dead ends: 651 [2020-07-21 15:58:23,098 INFO L226 Difference]: Without dead ends: 385 [2020-07-21 15:58:23,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 929 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=1283, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 15:58:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-07-21 15:58:23,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 254. [2020-07-21 15:58:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-07-21 15:58:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 413 transitions. [2020-07-21 15:58:23,122 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 413 transitions. Word has length 484 [2020-07-21 15:58:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:58:23,122 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 413 transitions. [2020-07-21 15:58:23,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 15:58:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 413 transitions. [2020-07-21 15:58:23,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 15:58:23,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:58:23,128 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 36, 36, 22, 21, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:58:23,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:23,343 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:58:23,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:58:23,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1987242312, now seen corresponding path program 21 times [2020-07-21 15:58:23,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:58:23,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146235204] [2020-07-21 15:58:23,345 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:58:23,747 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:58:23,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:58:23,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:58:23,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:58:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 4107 proven. 279 refuted. 0 times theorem prover too weak. 2835 trivial. 0 not checked. [2020-07-21 15:58:24,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:58:26,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:26,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:26,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:26,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:26,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:26,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:27,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:27,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:27,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:27,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:27,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 626 proven. 971 refuted. 0 times theorem prover too weak. 5624 trivial. 0 not checked. [2020-07-21 15:58:28,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146235204] [2020-07-21 15:58:28,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:58:28,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-21 15:58:28,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695399291] [2020-07-21 15:58:28,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 15:58:28,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:58:28,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 15:58:28,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:58:28,031 INFO L87 Difference]: Start difference. First operand 254 states and 413 transitions. Second operand 23 states. [2020-07-21 15:58:29,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:58:29,058 INFO L93 Difference]: Finished difference Result 656 states and 1154 transitions. [2020-07-21 15:58:29,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 15:58:29,059 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 500 [2020-07-21 15:58:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:58:29,063 INFO L225 Difference]: With dead ends: 656 [2020-07-21 15:58:29,063 INFO L226 Difference]: Without dead ends: 327 [2020-07-21 15:58:29,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 961 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 15:58:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-07-21 15:58:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 268. [2020-07-21 15:58:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-07-21 15:58:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 445 transitions. [2020-07-21 15:58:29,088 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 445 transitions. Word has length 500 [2020-07-21 15:58:29,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:58:29,089 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 445 transitions. [2020-07-21 15:58:29,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 15:58:29,089 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 445 transitions. [2020-07-21 15:58:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-07-21 15:58:29,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:58:29,094 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 32, 32, 22, 21, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 14, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:58:29,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:29,307 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:58:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:58:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash -241935132, now seen corresponding path program 22 times [2020-07-21 15:58:29,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:58:29,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725272260] [2020-07-21 15:58:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:58:29,740 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:58:29,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:58:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:58:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:58:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5829 backedges. 3328 proven. 152 refuted. 0 times theorem prover too weak. 2349 trivial. 0 not checked. [2020-07-21 15:58:30,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:58:32,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:32,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:32,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:32,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:32,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:32,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:33,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:33,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:33,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:33,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:33,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:33,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5829 backedges. 462 proven. 945 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2020-07-21 15:58:33,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725272260] [2020-07-21 15:58:33,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:58:33,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-21 15:58:33,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512081430] [2020-07-21 15:58:33,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 15:58:33,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:58:33,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 15:58:33,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:58:33,875 INFO L87 Difference]: Start difference. First operand 268 states and 445 transitions. Second operand 23 states. [2020-07-21 15:58:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:58:34,893 INFO L93 Difference]: Finished difference Result 522 states and 880 transitions. [2020-07-21 15:58:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 15:58:34,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 452 [2020-07-21 15:58:34,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:58:34,900 INFO L225 Difference]: With dead ends: 522 [2020-07-21 15:58:34,900 INFO L226 Difference]: Without dead ends: 260 [2020-07-21 15:58:34,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 865 SyntacticMatches, 17 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 15:58:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-21 15:58:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 244. [2020-07-21 15:58:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-21 15:58:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 377 transitions. [2020-07-21 15:58:34,926 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 377 transitions. Word has length 452 [2020-07-21 15:58:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:58:34,927 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 377 transitions. [2020-07-21 15:58:34,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 15:58:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 377 transitions. [2020-07-21 15:58:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2020-07-21 15:58:34,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:58:34,932 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 28, 28, 21, 20, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 12, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:58:35,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:35,133 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:58:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:58:35,134 INFO L82 PathProgramCache]: Analyzing trace with hash 64811895, now seen corresponding path program 23 times [2020-07-21 15:58:35,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:58:35,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438733465] [2020-07-21 15:58:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:58:35,563 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:58:35,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:58:35,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 15:58:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:58:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4868 backedges. 557 proven. 1022 refuted. 0 times theorem prover too weak. 3289 trivial. 0 not checked. [2020-07-21 15:58:35,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:58:37,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:38,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:38,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:38,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:38,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:38,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:38,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:38,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:39,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:40,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:40,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:40,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:40,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:40,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:40,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:40,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4868 backedges. 559 proven. 1046 refuted. 0 times theorem prover too weak. 3263 trivial. 0 not checked. [2020-07-21 15:58:40,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438733465] [2020-07-21 15:58:40,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:58:40,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-21 15:58:40,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430229748] [2020-07-21 15:58:40,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 15:58:40,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:58:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 15:58:40,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:58:40,612 INFO L87 Difference]: Start difference. First operand 244 states and 377 transitions. Second operand 29 states. [2020-07-21 15:58:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:58:42,469 INFO L93 Difference]: Finished difference Result 634 states and 1088 transitions. [2020-07-21 15:58:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 15:58:42,470 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 414 [2020-07-21 15:58:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:58:42,476 INFO L225 Difference]: With dead ends: 634 [2020-07-21 15:58:42,477 INFO L226 Difference]: Without dead ends: 294 [2020-07-21 15:58:42,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 777 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=443, Invalid=2313, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 15:58:42,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-21 15:58:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 269. [2020-07-21 15:58:42,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-07-21 15:58:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 436 transitions. [2020-07-21 15:58:42,500 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 436 transitions. Word has length 414 [2020-07-21 15:58:42,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:58:42,501 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 436 transitions. [2020-07-21 15:58:42,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 15:58:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 436 transitions. [2020-07-21 15:58:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 15:58:42,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:58:42,505 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 22, 22, 17, 16, 14, 14, 14, 14, 14, 14, 14, 12, 11, 11, 11, 11, 11, 11, 11, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:58:42,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:42,720 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:58:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:58:42,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1892239820, now seen corresponding path program 24 times [2020-07-21 15:58:42,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:58:42,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699381445] [2020-07-21 15:58:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:58:43,188 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:58:43,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:58:43,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:58:43,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:58:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 243 proven. 459 refuted. 0 times theorem prover too weak. 2686 trivial. 0 not checked. [2020-07-21 15:58:43,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:58:44,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:45,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:45,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:45,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:45,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:45,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:45,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 245 proven. 473 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2020-07-21 15:58:46,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699381445] [2020-07-21 15:58:46,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:58:46,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 15:58:46,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528128714] [2020-07-21 15:58:46,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 15:58:46,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:58:46,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 15:58:46,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:58:46,165 INFO L87 Difference]: Start difference. First operand 269 states and 436 transitions. Second operand 18 states. [2020-07-21 15:58:46,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:58:46,550 INFO L93 Difference]: Finished difference Result 301 states and 500 transitions. [2020-07-21 15:58:46,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:58:46,551 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 346 [2020-07-21 15:58:46,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:58:46,555 INFO L225 Difference]: With dead ends: 301 [2020-07-21 15:58:46,555 INFO L226 Difference]: Without dead ends: 297 [2020-07-21 15:58:46,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 663 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 15:58:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-07-21 15:58:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 289. [2020-07-21 15:58:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-07-21 15:58:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 482 transitions. [2020-07-21 15:58:46,576 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 482 transitions. Word has length 346 [2020-07-21 15:58:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:58:46,577 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 482 transitions. [2020-07-21 15:58:46,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 15:58:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 482 transitions. [2020-07-21 15:58:46,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-07-21 15:58:46,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:58:46,582 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 14, 14, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:58:46,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:46,795 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:58:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:58:46,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1315226332, now seen corresponding path program 25 times [2020-07-21 15:58:46,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:58:46,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864869428] [2020-07-21 15:58:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:58:47,241 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:58:47,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:58:47,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:58:47,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:58:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 479 proven. 465 refuted. 0 times theorem prover too weak. 1402 trivial. 0 not checked. [2020-07-21 15:58:47,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:58:49,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:49,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:49,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:49,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:49,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:49,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:50,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:50,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:51,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:51,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:51,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:51,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:51,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:51,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 481 proven. 481 refuted. 0 times theorem prover too weak. 1384 trivial. 0 not checked. [2020-07-21 15:58:51,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864869428] [2020-07-21 15:58:51,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:58:51,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 15:58:51,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835297529] [2020-07-21 15:58:51,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 15:58:51,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:58:51,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 15:58:51,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2020-07-21 15:58:51,584 INFO L87 Difference]: Start difference. First operand 289 states and 482 transitions. Second operand 27 states. [2020-07-21 15:58:53,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:58:53,666 INFO L93 Difference]: Finished difference Result 609 states and 1030 transitions. [2020-07-21 15:58:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 15:58:53,669 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 293 [2020-07-21 15:58:53,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:58:53,674 INFO L225 Difference]: With dead ends: 609 [2020-07-21 15:58:53,675 INFO L226 Difference]: Without dead ends: 318 [2020-07-21 15:58:53,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 539 SyntacticMatches, 21 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=305, Invalid=1587, Unknown=0, NotChecked=0, Total=1892 [2020-07-21 15:58:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-07-21 15:58:53,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 273. [2020-07-21 15:58:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-07-21 15:58:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 421 transitions. [2020-07-21 15:58:53,705 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 421 transitions. Word has length 293 [2020-07-21 15:58:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:58:53,705 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 421 transitions. [2020-07-21 15:58:53,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 15:58:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 421 transitions. [2020-07-21 15:58:53,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 15:58:53,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:58:53,710 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 20, 20, 17, 16, 13, 13, 13, 13, 13, 13, 13, 10, 10, 10, 10, 10, 10, 10, 10, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:58:53,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:58:53,924 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:58:53,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:58:53,924 INFO L82 PathProgramCache]: Analyzing trace with hash 533598824, now seen corresponding path program 26 times [2020-07-21 15:58:53,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:58:53,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353442405] [2020-07-21 15:58:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:58:54,511 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:58:54,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:58:54,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:58:54,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:58:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2912 backedges. 114 proven. 646 refuted. 0 times theorem prover too weak. 2152 trivial. 0 not checked. [2020-07-21 15:58:55,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:58:57,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:58,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:58,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:58,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:59,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:59,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:59,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:59,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:59,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:59,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:59,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2912 backedges. 114 proven. 670 refuted. 0 times theorem prover too weak. 2128 trivial. 0 not checked. [2020-07-21 15:59:00,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353442405] [2020-07-21 15:59:00,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:00,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 15:59:00,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603813816] [2020-07-21 15:59:00,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 15:59:00,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:00,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 15:59:00,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 15:59:00,096 INFO L87 Difference]: Start difference. First operand 273 states and 421 transitions. Second operand 20 states. [2020-07-21 15:59:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:00,566 INFO L93 Difference]: Finished difference Result 283 states and 435 transitions. [2020-07-21 15:59:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 15:59:00,568 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 322 [2020-07-21 15:59:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:00,574 INFO L225 Difference]: With dead ends: 283 [2020-07-21 15:59:00,575 INFO L226 Difference]: Without dead ends: 279 [2020-07-21 15:59:00,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 611 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 15:59:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-07-21 15:59:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 263. [2020-07-21 15:59:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-07-21 15:59:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 403 transitions. [2020-07-21 15:59:00,600 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 403 transitions. Word has length 322 [2020-07-21 15:59:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:00,600 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 403 transitions. [2020-07-21 15:59:00,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 15:59:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 403 transitions. [2020-07-21 15:59:00,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2020-07-21 15:59:00,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:00,607 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 21, 20, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:00,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:00,822 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:00,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1369398457, now seen corresponding path program 27 times [2020-07-21 15:59:00,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:00,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780707419] [2020-07-21 15:59:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:59:01,424 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:01,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:01,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:59:01,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 609 proven. 845 refuted. 0 times theorem prover too weak. 3386 trivial. 0 not checked. [2020-07-21 15:59:01,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:04,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:04,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:04,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:04,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:04,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:04,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:04,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:04,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:04,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:06,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:06,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:06,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:06,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:06,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 611 proven. 863 refuted. 0 times theorem prover too weak. 3366 trivial. 0 not checked. [2020-07-21 15:59:06,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780707419] [2020-07-21 15:59:06,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:06,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 15:59:06,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126651997] [2020-07-21 15:59:06,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 15:59:06,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:06,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 15:59:06,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-07-21 15:59:06,961 INFO L87 Difference]: Start difference. First operand 263 states and 403 transitions. Second operand 27 states. [2020-07-21 15:59:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:08,595 INFO L93 Difference]: Finished difference Result 670 states and 1139 transitions. [2020-07-21 15:59:08,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 15:59:08,600 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 414 [2020-07-21 15:59:08,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:08,606 INFO L225 Difference]: With dead ends: 670 [2020-07-21 15:59:08,606 INFO L226 Difference]: Without dead ends: 398 [2020-07-21 15:59:08,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 781 SyntacticMatches, 21 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=2042, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 15:59:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-07-21 15:59:08,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 292. [2020-07-21 15:59:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-07-21 15:59:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 453 transitions. [2020-07-21 15:59:08,639 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 453 transitions. Word has length 414 [2020-07-21 15:59:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:08,640 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 453 transitions. [2020-07-21 15:59:08,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 15:59:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 453 transitions. [2020-07-21 15:59:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-07-21 15:59:08,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:08,643 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 21, 20, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:08,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:08,844 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash -904928681, now seen corresponding path program 28 times [2020-07-21 15:59:08,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:08,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266950785] [2020-07-21 15:59:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:59:09,369 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:09,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 15:59:09,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 671 proven. 800 refuted. 0 times theorem prover too weak. 2793 trivial. 0 not checked. [2020-07-21 15:59:09,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:12,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:12,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:12,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:12,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:13,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:14,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:14,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:14,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:14,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:14,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:14,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:14,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 671 proven. 826 refuted. 0 times theorem prover too weak. 2767 trivial. 0 not checked. [2020-07-21 15:59:14,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266950785] [2020-07-21 15:59:14,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:14,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-21 15:59:14,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493122525] [2020-07-21 15:59:14,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 15:59:14,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:14,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 15:59:14,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:59:14,936 INFO L87 Difference]: Start difference. First operand 292 states and 453 transitions. Second operand 29 states. [2020-07-21 15:59:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:17,271 INFO L93 Difference]: Finished difference Result 823 states and 1453 transitions. [2020-07-21 15:59:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 15:59:17,273 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 390 [2020-07-21 15:59:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:17,279 INFO L225 Difference]: With dead ends: 823 [2020-07-21 15:59:17,279 INFO L226 Difference]: Without dead ends: 470 [2020-07-21 15:59:17,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 729 SyntacticMatches, 23 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=465, Invalid=2505, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 15:59:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-07-21 15:59:17,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 301. [2020-07-21 15:59:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-07-21 15:59:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 482 transitions. [2020-07-21 15:59:17,312 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 482 transitions. Word has length 390 [2020-07-21 15:59:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:17,312 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 482 transitions. [2020-07-21 15:59:17,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 15:59:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 482 transitions. [2020-07-21 15:59:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 15:59:17,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:17,318 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 22, 22, 17, 16, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 8, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:17,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:17,534 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2096162248, now seen corresponding path program 29 times [2020-07-21 15:59:17,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:17,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062204740] [2020-07-21 15:59:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:59:18,143 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:18,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:18,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:59:18,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2864 backedges. 148 proven. 502 refuted. 0 times theorem prover too weak. 2214 trivial. 0 not checked. [2020-07-21 15:59:18,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:20,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:20,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:20,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:20,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:20,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:20,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:21,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:21,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:21,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:21,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2864 backedges. 148 proven. 518 refuted. 0 times theorem prover too weak. 2198 trivial. 0 not checked. [2020-07-21 15:59:21,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062204740] [2020-07-21 15:59:21,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:21,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 15:59:21,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235550909] [2020-07-21 15:59:21,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 15:59:21,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 15:59:21,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:59:21,315 INFO L87 Difference]: Start difference. First operand 301 states and 482 transitions. Second operand 18 states. [2020-07-21 15:59:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:21,666 INFO L93 Difference]: Finished difference Result 356 states and 592 transitions. [2020-07-21 15:59:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:59:21,668 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 322 [2020-07-21 15:59:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:21,673 INFO L225 Difference]: With dead ends: 356 [2020-07-21 15:59:21,673 INFO L226 Difference]: Without dead ends: 352 [2020-07-21 15:59:21,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 615 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 15:59:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-07-21 15:59:21,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 306. [2020-07-21 15:59:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-07-21 15:59:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 492 transitions. [2020-07-21 15:59:21,688 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 492 transitions. Word has length 322 [2020-07-21 15:59:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:21,689 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 492 transitions. [2020-07-21 15:59:21,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 15:59:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 492 transitions. [2020-07-21 15:59:21,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-07-21 15:59:21,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:21,693 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 24, 24, 17, 16, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 12, 8, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:21,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:21,895 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:21,896 INFO L82 PathProgramCache]: Analyzing trace with hash 682635329, now seen corresponding path program 30 times [2020-07-21 15:59:21,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:21,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259059624] [2020-07-21 15:59:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:59:22,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:22,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:22,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:59:22,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 189 proven. 543 refuted. 0 times theorem prover too weak. 2880 trivial. 0 not checked. [2020-07-21 15:59:22,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:24,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:24,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:24,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 189 proven. 559 refuted. 0 times theorem prover too weak. 2864 trivial. 0 not checked. [2020-07-21 15:59:25,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259059624] [2020-07-21 15:59:25,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:25,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 15:59:25,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62451473] [2020-07-21 15:59:25,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 15:59:25,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 15:59:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:59:25,699 INFO L87 Difference]: Start difference. First operand 306 states and 492 transitions. Second operand 18 states. [2020-07-21 15:59:26,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:26,030 INFO L93 Difference]: Finished difference Result 346 states and 570 transitions. [2020-07-21 15:59:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:59:26,032 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 358 [2020-07-21 15:59:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:26,036 INFO L225 Difference]: With dead ends: 346 [2020-07-21 15:59:26,037 INFO L226 Difference]: Without dead ends: 342 [2020-07-21 15:59:26,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 687 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 15:59:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-07-21 15:59:26,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 291. [2020-07-21 15:59:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-07-21 15:59:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 462 transitions. [2020-07-21 15:59:26,051 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 462 transitions. Word has length 358 [2020-07-21 15:59:26,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:26,051 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 462 transitions. [2020-07-21 15:59:26,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 15:59:26,052 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 462 transitions. [2020-07-21 15:59:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-07-21 15:59:26,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:26,055 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 28, 28, 19, 19, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 14, 9, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:26,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:26,257 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:26,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:26,258 INFO L82 PathProgramCache]: Analyzing trace with hash -396608115, now seen corresponding path program 31 times [2020-07-21 15:59:26,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:26,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002987007] [2020-07-21 15:59:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:59:26,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:26,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:59:26,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 2636 proven. 280 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2020-07-21 15:59:27,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:29,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:29,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:30,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:30,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:30,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:30,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:30,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:31,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:31,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 575 proven. 720 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-07-21 15:59:31,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002987007] [2020-07-21 15:59:31,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:31,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-21 15:59:31,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710441777] [2020-07-21 15:59:31,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 15:59:31,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:31,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 15:59:31,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:59:31,395 INFO L87 Difference]: Start difference. First operand 291 states and 462 transitions. Second operand 23 states. [2020-07-21 15:59:32,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:32,589 INFO L93 Difference]: Finished difference Result 739 states and 1295 transitions. [2020-07-21 15:59:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 15:59:32,590 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 411 [2020-07-21 15:59:32,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:32,596 INFO L225 Difference]: With dead ends: 739 [2020-07-21 15:59:32,596 INFO L226 Difference]: Without dead ends: 381 [2020-07-21 15:59:32,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 783 SyntacticMatches, 17 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 15:59:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-07-21 15:59:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 299. [2020-07-21 15:59:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-07-21 15:59:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 484 transitions. [2020-07-21 15:59:32,620 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 484 transitions. Word has length 411 [2020-07-21 15:59:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:32,620 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 484 transitions. [2020-07-21 15:59:32,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 15:59:32,621 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 484 transitions. [2020-07-21 15:59:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 15:59:32,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:32,624 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 24, 24, 17, 16, 15, 15, 15, 15, 15, 15, 15, 14, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:32,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:32,830 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:32,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:32,831 INFO L82 PathProgramCache]: Analyzing trace with hash 879274006, now seen corresponding path program 32 times [2020-07-21 15:59:32,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:32,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591738070] [2020-07-21 15:59:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:59:33,457 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:33,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:33,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:59:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3904 backedges. 340 proven. 310 refuted. 0 times theorem prover too weak. 3254 trivial. 0 not checked. [2020-07-21 15:59:33,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:35,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:35,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:35,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:35,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:35,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:35,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:35,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:35,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3904 backedges. 340 proven. 322 refuted. 0 times theorem prover too weak. 3242 trivial. 0 not checked. [2020-07-21 15:59:36,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591738070] [2020-07-21 15:59:36,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:36,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 15:59:36,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681746988] [2020-07-21 15:59:36,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 15:59:36,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:36,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 15:59:36,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:59:36,259 INFO L87 Difference]: Start difference. First operand 299 states and 484 transitions. Second operand 16 states. [2020-07-21 15:59:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:36,544 INFO L93 Difference]: Finished difference Result 339 states and 594 transitions. [2020-07-21 15:59:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:59:36,545 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 370 [2020-07-21 15:59:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:36,551 INFO L225 Difference]: With dead ends: 339 [2020-07-21 15:59:36,551 INFO L226 Difference]: Without dead ends: 335 [2020-07-21 15:59:36,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 715 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:59:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-07-21 15:59:36,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 307. [2020-07-21 15:59:36,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-07-21 15:59:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 513 transitions. [2020-07-21 15:59:36,570 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 513 transitions. Word has length 370 [2020-07-21 15:59:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:36,570 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 513 transitions. [2020-07-21 15:59:36,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 15:59:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 513 transitions. [2020-07-21 15:59:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2020-07-21 15:59:36,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:36,577 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 31, 31, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 16, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:36,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:36,778 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:36,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1501659007, now seen corresponding path program 33 times [2020-07-21 15:59:36,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:36,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649604989] [2020-07-21 15:59:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:59:37,422 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:37,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:37,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 15:59:37,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11418 backedges. 6174 proven. 935 refuted. 0 times theorem prover too weak. 4309 trivial. 0 not checked. [2020-07-21 15:59:37,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:42,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:42,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:43,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:43,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:43,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:43,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:43,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:43,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:43,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:45,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:45,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:45,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:45,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:45,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:45,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:46,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11418 backedges. 626 proven. 2283 refuted. 0 times theorem prover too weak. 8509 trivial. 0 not checked. [2020-07-21 15:59:46,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649604989] [2020-07-21 15:59:46,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:46,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 33 [2020-07-21 15:59:46,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477234048] [2020-07-21 15:59:46,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 15:59:46,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 15:59:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 15:59:46,256 INFO L87 Difference]: Start difference. First operand 307 states and 513 transitions. Second operand 33 states. [2020-07-21 15:59:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:48,168 INFO L93 Difference]: Finished difference Result 694 states and 1278 transitions. [2020-07-21 15:59:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 15:59:48,170 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 627 [2020-07-21 15:59:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:48,176 INFO L225 Difference]: With dead ends: 694 [2020-07-21 15:59:48,176 INFO L226 Difference]: Without dead ends: 389 [2020-07-21 15:59:48,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1275 GetRequests, 1199 SyntacticMatches, 23 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 15:59:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-07-21 15:59:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 319. [2020-07-21 15:59:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-07-21 15:59:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 551 transitions. [2020-07-21 15:59:48,202 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 551 transitions. Word has length 627 [2020-07-21 15:59:48,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:48,202 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 551 transitions. [2020-07-21 15:59:48,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 15:59:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 551 transitions. [2020-07-21 15:59:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-07-21 15:59:48,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:48,207 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 17, 16, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 10, 10, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:48,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:48,415 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1138981697, now seen corresponding path program 34 times [2020-07-21 15:59:48,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:48,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302336191] [2020-07-21 15:59:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:59:49,125 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:49,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:59:49,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3584 backedges. 384 proven. 352 refuted. 0 times theorem prover too weak. 2848 trivial. 0 not checked. [2020-07-21 15:59:49,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:51,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:51,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:51,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:51,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:51,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:51,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:51,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:51,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:51,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:51,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:52,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3584 backedges. 386 proven. 366 refuted. 0 times theorem prover too weak. 2832 trivial. 0 not checked. [2020-07-21 15:59:52,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302336191] [2020-07-21 15:59:52,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:52,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 15:59:52,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782307486] [2020-07-21 15:59:52,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 15:59:52,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:52,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 15:59:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:59:52,621 INFO L87 Difference]: Start difference. First operand 319 states and 551 transitions. Second operand 18 states. [2020-07-21 15:59:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:52,970 INFO L93 Difference]: Finished difference Result 361 states and 666 transitions. [2020-07-21 15:59:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:59:52,972 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 358 [2020-07-21 15:59:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:52,979 INFO L225 Difference]: With dead ends: 361 [2020-07-21 15:59:52,979 INFO L226 Difference]: Without dead ends: 357 [2020-07-21 15:59:52,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 687 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 15:59:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-07-21 15:59:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 316. [2020-07-21 15:59:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-07-21 15:59:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 538 transitions. [2020-07-21 15:59:53,006 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 538 transitions. Word has length 358 [2020-07-21 15:59:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:53,006 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 538 transitions. [2020-07-21 15:59:53,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 15:59:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 538 transitions. [2020-07-21 15:59:53,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-07-21 15:59:53,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:53,011 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 19, 19, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 14, 11, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:53,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:53,219 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:53,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1599713174, now seen corresponding path program 35 times [2020-07-21 15:59:53,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:53,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257450771] [2020-07-21 15:59:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:59:53,940 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:53,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:53,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:59:53,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5094 backedges. 2416 proven. 594 refuted. 0 times theorem prover too weak. 2084 trivial. 0 not checked. [2020-07-21 15:59:54,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:57,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:57,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:57,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:57,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:57,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:59,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:59,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:59,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:59,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:59,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:59,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:00,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:00,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:00,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:00,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5094 backedges. 542 proven. 1032 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2020-07-21 16:00:00,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257450771] [2020-07-21 16:00:00,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:00,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 16:00:00,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712099640] [2020-07-21 16:00:00,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 16:00:00,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:00,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 16:00:00,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:00:00,463 INFO L87 Difference]: Start difference. First operand 316 states and 538 transitions. Second operand 27 states. [2020-07-21 16:00:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:01,902 INFO L93 Difference]: Finished difference Result 681 states and 1197 transitions. [2020-07-21 16:00:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 16:00:01,903 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 423 [2020-07-21 16:00:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:01,908 INFO L225 Difference]: With dead ends: 681 [2020-07-21 16:00:01,908 INFO L226 Difference]: Without dead ends: 371 [2020-07-21 16:00:01,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 799 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 16:00:01,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-21 16:00:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 321. [2020-07-21 16:00:01,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-07-21 16:00:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 544 transitions. [2020-07-21 16:00:01,928 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 544 transitions. Word has length 423 [2020-07-21 16:00:01,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:01,929 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 544 transitions. [2020-07-21 16:00:01,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 16:00:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 544 transitions. [2020-07-21 16:00:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2020-07-21 16:00:01,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:01,934 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 27, 27, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 16, 15, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:02,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:02,135 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:02,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1803488541, now seen corresponding path program 36 times [2020-07-21 16:00:02,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:02,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45173255] [2020-07-21 16:00:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:00:02,848 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:00:02,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:02,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 16:00:02,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9438 backedges. 1052 proven. 1251 refuted. 0 times theorem prover too weak. 7135 trivial. 0 not checked. [2020-07-21 16:00:03,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:07,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:07,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:08,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:08,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:08,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:08,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:08,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:08,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:08,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:10,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:10,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:10,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:10,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:10,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9438 backedges. 1052 proven. 1280 refuted. 0 times theorem prover too weak. 7106 trivial. 0 not checked. [2020-07-21 16:00:11,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45173255] [2020-07-21 16:00:11,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:11,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 31 [2020-07-21 16:00:11,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552172872] [2020-07-21 16:00:11,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 16:00:11,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:11,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 16:00:11,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2020-07-21 16:00:11,111 INFO L87 Difference]: Start difference. First operand 321 states and 544 transitions. Second operand 31 states. [2020-07-21 16:00:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:13,597 INFO L93 Difference]: Finished difference Result 821 states and 1547 transitions. [2020-07-21 16:00:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 16:00:13,600 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 571 [2020-07-21 16:00:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:13,609 INFO L225 Difference]: With dead ends: 821 [2020-07-21 16:00:13,609 INFO L226 Difference]: Without dead ends: 500 [2020-07-21 16:00:13,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1170 GetRequests, 1091 SyntacticMatches, 21 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=554, Invalid=2986, Unknown=0, NotChecked=0, Total=3540 [2020-07-21 16:00:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2020-07-21 16:00:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 429. [2020-07-21 16:00:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-07-21 16:00:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 789 transitions. [2020-07-21 16:00:13,648 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 789 transitions. Word has length 571 [2020-07-21 16:00:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:13,648 INFO L479 AbstractCegarLoop]: Abstraction has 429 states and 789 transitions. [2020-07-21 16:00:13,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 16:00:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 789 transitions. [2020-07-21 16:00:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-21 16:00:13,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:13,656 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 31, 31, 23, 23, 19, 19, 19, 19, 19, 19, 19, 15, 15, 15, 15, 15, 15, 15, 15, 8, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:13,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:13,872 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:13,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash 161823585, now seen corresponding path program 37 times [2020-07-21 16:00:13,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:13,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761350315] [2020-07-21 16:00:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:00:14,661 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:00:14,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:14,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 16:00:14,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6282 backedges. 857 proven. 1125 refuted. 0 times theorem prover too weak. 4300 trivial. 0 not checked. [2020-07-21 16:00:15,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:17,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:17,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:17,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:18,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:18,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:18,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:21,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:21,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:22,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:22,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:22,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:22,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:23,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6282 backedges. 857 proven. 1159 refuted. 0 times theorem prover too weak. 4266 trivial. 0 not checked. [2020-07-21 16:00:23,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761350315] [2020-07-21 16:00:23,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:23,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 31 [2020-07-21 16:00:23,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86875109] [2020-07-21 16:00:23,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 16:00:23,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:23,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 16:00:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2020-07-21 16:00:23,284 INFO L87 Difference]: Start difference. First operand 429 states and 789 transitions. Second operand 31 states. [2020-07-21 16:00:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:26,328 INFO L93 Difference]: Finished difference Result 947 states and 1873 transitions. [2020-07-21 16:00:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 16:00:26,331 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 467 [2020-07-21 16:00:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:26,340 INFO L225 Difference]: With dead ends: 947 [2020-07-21 16:00:26,340 INFO L226 Difference]: Without dead ends: 524 [2020-07-21 16:00:26,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 879 SyntacticMatches, 25 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 16:00:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-07-21 16:00:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 464. [2020-07-21 16:00:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-07-21 16:00:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 863 transitions. [2020-07-21 16:00:26,369 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 863 transitions. Word has length 467 [2020-07-21 16:00:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:26,369 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 863 transitions. [2020-07-21 16:00:26,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 16:00:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 863 transitions. [2020-07-21 16:00:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 16:00:26,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:26,374 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 26, 26, 17, 16, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 12, 10, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:26,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:26,575 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash -614804058, now seen corresponding path program 38 times [2020-07-21 16:00:26,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:26,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709856286] [2020-07-21 16:00:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:00:27,334 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:27,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:00:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 368 proven. 278 refuted. 0 times theorem prover too weak. 3210 trivial. 0 not checked. [2020-07-21 16:00:27,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:29,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:29,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:29,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:29,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:29,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 370 proven. 286 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2020-07-21 16:00:31,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709856286] [2020-07-21 16:00:31,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:31,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:00:31,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342650787] [2020-07-21 16:00:31,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:00:31,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:31,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:00:31,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:00:31,043 INFO L87 Difference]: Start difference. First operand 464 states and 863 transitions. Second operand 16 states. [2020-07-21 16:00:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:31,475 INFO L93 Difference]: Finished difference Result 545 states and 1140 transitions. [2020-07-21 16:00:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:00:31,478 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 370 [2020-07-21 16:00:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:31,485 INFO L225 Difference]: With dead ends: 545 [2020-07-21 16:00:31,486 INFO L226 Difference]: Without dead ends: 541 [2020-07-21 16:00:31,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 715 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:00:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-07-21 16:00:31,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 464. [2020-07-21 16:00:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-07-21 16:00:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 863 transitions. [2020-07-21 16:00:31,517 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 863 transitions. Word has length 370 [2020-07-21 16:00:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:31,517 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 863 transitions. [2020-07-21 16:00:31,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:00:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 863 transitions. [2020-07-21 16:00:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 16:00:31,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:31,522 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 17, 16, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:31,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:31,723 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:31,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1583832276, now seen corresponding path program 39 times [2020-07-21 16:00:31,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:31,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181352761] [2020-07-21 16:00:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:00:32,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:32,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:32,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:00:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4404 backedges. 634 proven. 188 refuted. 0 times theorem prover too weak. 3582 trivial. 0 not checked. [2020-07-21 16:00:32,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:34,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:34,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:35,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:35,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:35,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:35,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:35,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:35,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:36,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4404 backedges. 638 proven. 200 refuted. 0 times theorem prover too weak. 3566 trivial. 0 not checked. [2020-07-21 16:00:37,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181352761] [2020-07-21 16:00:37,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:37,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:00:37,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004437125] [2020-07-21 16:00:37,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:00:37,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:37,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:00:37,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:00:37,394 INFO L87 Difference]: Start difference. First operand 464 states and 863 transitions. Second operand 18 states. [2020-07-21 16:00:37,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:37,844 INFO L93 Difference]: Finished difference Result 478 states and 887 transitions. [2020-07-21 16:00:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:00:37,846 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 394 [2020-07-21 16:00:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:37,853 INFO L225 Difference]: With dead ends: 478 [2020-07-21 16:00:37,853 INFO L226 Difference]: Without dead ends: 474 [2020-07-21 16:00:37,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 759 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:00:37,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-07-21 16:00:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 464. [2020-07-21 16:00:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-07-21 16:00:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 863 transitions. [2020-07-21 16:00:37,878 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 863 transitions. Word has length 394 [2020-07-21 16:00:37,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:37,878 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 863 transitions. [2020-07-21 16:00:37,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:00:37,878 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 863 transitions. [2020-07-21 16:00:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-21 16:00:37,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:37,885 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 17, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:38,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:38,101 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:38,102 INFO L82 PathProgramCache]: Analyzing trace with hash 340715003, now seen corresponding path program 40 times [2020-07-21 16:00:38,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:38,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723618211] [2020-07-21 16:00:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:00:38,966 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:38,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:00:38,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4696 backedges. 547 proven. 165 refuted. 0 times theorem prover too weak. 3984 trivial. 0 not checked. [2020-07-21 16:00:39,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:40,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:41,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:41,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:41,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:41,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:41,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:42,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4696 backedges. 549 proven. 173 refuted. 0 times theorem prover too weak. 3974 trivial. 0 not checked. [2020-07-21 16:00:43,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723618211] [2020-07-21 16:00:43,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:43,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:00:43,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28262204] [2020-07-21 16:00:43,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:00:43,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:43,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:00:43,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:00:43,439 INFO L87 Difference]: Start difference. First operand 464 states and 863 transitions. Second operand 16 states. [2020-07-21 16:00:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:43,921 INFO L93 Difference]: Finished difference Result 505 states and 982 transitions. [2020-07-21 16:00:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:00:43,924 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 406 [2020-07-21 16:00:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:43,931 INFO L225 Difference]: With dead ends: 505 [2020-07-21 16:00:43,932 INFO L226 Difference]: Without dead ends: 501 [2020-07-21 16:00:43,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 787 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:00:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-07-21 16:00:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 478. [2020-07-21 16:00:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-07-21 16:00:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 916 transitions. [2020-07-21 16:00:43,960 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 916 transitions. Word has length 406 [2020-07-21 16:00:43,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:43,960 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 916 transitions. [2020-07-21 16:00:43,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:00:43,960 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 916 transitions. [2020-07-21 16:00:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-21 16:00:43,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:43,965 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 17, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:44,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:44,166 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash 805738299, now seen corresponding path program 41 times [2020-07-21 16:00:44,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:44,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746085370] [2020-07-21 16:00:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:00:44,962 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:44,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:44,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:00:44,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4696 backedges. 173 proven. 925 refuted. 0 times theorem prover too weak. 3598 trivial. 0 not checked. [2020-07-21 16:00:45,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:49,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:49,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:50,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:51,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:51,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:52,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:52,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:52,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:52,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:52,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:52,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:52,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4696 backedges. 173 proven. 955 refuted. 0 times theorem prover too weak. 3568 trivial. 0 not checked. [2020-07-21 16:00:52,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746085370] [2020-07-21 16:00:52,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:52,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 16:00:52,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437942194] [2020-07-21 16:00:52,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 16:00:52,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:52,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 16:00:52,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 16:00:52,995 INFO L87 Difference]: Start difference. First operand 478 states and 916 transitions. Second operand 22 states. [2020-07-21 16:00:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:53,495 INFO L93 Difference]: Finished difference Result 488 states and 932 transitions. [2020-07-21 16:00:53,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 16:00:53,497 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 406 [2020-07-21 16:00:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:53,504 INFO L225 Difference]: With dead ends: 488 [2020-07-21 16:00:53,504 INFO L226 Difference]: Without dead ends: 484 [2020-07-21 16:00:53,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 775 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 16:00:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-07-21 16:00:53,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 457. [2020-07-21 16:00:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-07-21 16:00:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 856 transitions. [2020-07-21 16:00:53,529 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 856 transitions. Word has length 406 [2020-07-21 16:00:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:53,530 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 856 transitions. [2020-07-21 16:00:53,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 16:00:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 856 transitions. [2020-07-21 16:00:53,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2020-07-21 16:00:53,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:53,539 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 63, 63, 51, 50, 42, 42, 42, 42, 42, 42, 42, 34, 31, 31, 31, 31, 31, 31, 31, 19, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:53,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:53,740 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:53,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:53,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1332160390, now seen corresponding path program 42 times [2020-07-21 16:00:53,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:53,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682081577] [2020-07-21 16:00:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:00:54,721 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:00:54,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 16:00:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 29560 backedges. 1433 proven. 4245 refuted. 0 times theorem prover too weak. 23882 trivial. 0 not checked. [2020-07-21 16:00:55,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:04,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:06,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:07,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:07,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:07,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:08,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:08,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:08,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:08,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:08,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:12,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:12,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:13,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:13,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:13,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:13,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 29560 backedges. 1433 proven. 4302 refuted. 0 times theorem prover too weak. 23825 trivial. 0 not checked. [2020-07-21 16:01:15,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682081577] [2020-07-21 16:01:15,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:15,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 39 [2020-07-21 16:01:15,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778549387] [2020-07-21 16:01:15,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-21 16:01:15,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:15,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-21 16:01:15,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 16:01:15,298 INFO L87 Difference]: Start difference. First operand 457 states and 856 transitions. Second operand 39 states. [2020-07-21 16:01:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:21,000 INFO L93 Difference]: Finished difference Result 1129 states and 2383 transitions. [2020-07-21 16:01:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-21 16:01:21,004 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 990 [2020-07-21 16:01:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:21,014 INFO L225 Difference]: With dead ends: 1129 [2020-07-21 16:01:21,014 INFO L226 Difference]: Without dead ends: 670 [2020-07-21 16:01:21,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2017 GetRequests, 1913 SyntacticMatches, 29 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=835, Invalid=5017, Unknown=0, NotChecked=0, Total=5852 [2020-07-21 16:01:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-07-21 16:01:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 494. [2020-07-21 16:01:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-07-21 16:01:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 974 transitions. [2020-07-21 16:01:21,052 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 974 transitions. Word has length 990 [2020-07-21 16:01:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:21,053 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 974 transitions. [2020-07-21 16:01:21,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-21 16:01:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 974 transitions. [2020-07-21 16:01:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2020-07-21 16:01:21,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:21,059 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 23, 23, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:21,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:21,260 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:21,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1756762543, now seen corresponding path program 43 times [2020-07-21 16:01:21,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:21,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527931487] [2020-07-21 16:01:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:01:22,135 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:22,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:22,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 16:01:22,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5562 backedges. 898 proven. 934 refuted. 0 times theorem prover too weak. 3730 trivial. 0 not checked. [2020-07-21 16:01:22,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:26,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:26,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:26,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:26,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:26,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:27,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:27,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:27,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:27,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:32,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5562 backedges. 902 proven. 960 refuted. 0 times theorem prover too weak. 3700 trivial. 0 not checked. [2020-07-21 16:01:32,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527931487] [2020-07-21 16:01:32,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:32,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 31 [2020-07-21 16:01:32,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563676659] [2020-07-21 16:01:32,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 16:01:32,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 16:01:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2020-07-21 16:01:32,226 INFO L87 Difference]: Start difference. First operand 494 states and 974 transitions. Second operand 31 states. [2020-07-21 16:01:35,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:35,135 INFO L93 Difference]: Finished difference Result 1016 states and 2037 transitions. [2020-07-21 16:01:35,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 16:01:35,138 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 443 [2020-07-21 16:01:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:35,147 INFO L225 Difference]: With dead ends: 1016 [2020-07-21 16:01:35,147 INFO L226 Difference]: Without dead ends: 524 [2020-07-21 16:01:35,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 831 SyntacticMatches, 25 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2020-07-21 16:01:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-07-21 16:01:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 470. [2020-07-21 16:01:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-07-21 16:01:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 856 transitions. [2020-07-21 16:01:35,180 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 856 transitions. Word has length 443 [2020-07-21 16:01:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:35,180 INFO L479 AbstractCegarLoop]: Abstraction has 470 states and 856 transitions. [2020-07-21 16:01:35,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 16:01:35,180 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 856 transitions. [2020-07-21 16:01:35,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-07-21 16:01:35,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:35,187 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 27, 27, 22, 22, 22, 22, 22, 22, 22, 17, 16, 16, 16, 16, 16, 16, 16, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:35,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:35,388 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:35,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1161733415, now seen corresponding path program 44 times [2020-07-21 16:01:35,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:35,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134343972] [2020-07-21 16:01:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:01:36,463 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:36,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:36,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:01:36,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8002 backedges. 209 proven. 1298 refuted. 0 times theorem prover too weak. 6495 trivial. 0 not checked. [2020-07-21 16:01:36,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:42,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:42,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:44,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:45,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:45,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:46,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:46,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:46,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:46,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:46,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:46,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:46,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8002 backedges. 209 proven. 1331 refuted. 0 times theorem prover too weak. 6462 trivial. 0 not checked. [2020-07-21 16:01:47,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134343972] [2020-07-21 16:01:47,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:47,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 16:01:47,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115964647] [2020-07-21 16:01:47,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 16:01:47,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 16:01:47,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 16:01:47,197 INFO L87 Difference]: Start difference. First operand 470 states and 856 transitions. Second operand 22 states. [2020-07-21 16:01:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:47,971 INFO L93 Difference]: Finished difference Result 499 states and 909 transitions. [2020-07-21 16:01:47,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 16:01:47,975 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 523 [2020-07-21 16:01:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:47,983 INFO L225 Difference]: With dead ends: 499 [2020-07-21 16:01:47,983 INFO L226 Difference]: Without dead ends: 495 [2020-07-21 16:01:47,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1009 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 16:01:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-07-21 16:01:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 486. [2020-07-21 16:01:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-07-21 16:01:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 889 transitions. [2020-07-21 16:01:48,013 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 889 transitions. Word has length 523 [2020-07-21 16:01:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:48,014 INFO L479 AbstractCegarLoop]: Abstraction has 486 states and 889 transitions. [2020-07-21 16:01:48,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 16:01:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 889 transitions. [2020-07-21 16:01:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2020-07-21 16:01:48,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:48,021 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 42, 42, 27, 27, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 18, 15, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:48,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:48,222 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:48,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:48,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1997272222, now seen corresponding path program 45 times [2020-07-21 16:01:48,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:48,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883721095] [2020-07-21 16:01:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:01:49,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:49,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:49,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1299 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:01:49,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 292 proven. 1195 refuted. 0 times theorem prover too weak. 8383 trivial. 0 not checked. [2020-07-21 16:01:49,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:54,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:57,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:57,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:58,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:58,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:58,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 292 proven. 1219 refuted. 0 times theorem prover too weak. 8359 trivial. 0 not checked. [2020-07-21 16:01:58,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883721095] [2020-07-21 16:01:58,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:58,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:01:58,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449610694] [2020-07-21 16:01:58,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:01:58,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:58,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:01:58,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:01:58,531 INFO L87 Difference]: Start difference. First operand 486 states and 889 transitions. Second operand 20 states. [2020-07-21 16:01:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:59,224 INFO L93 Difference]: Finished difference Result 588 states and 1145 transitions. [2020-07-21 16:01:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:01:59,226 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 583 [2020-07-21 16:01:59,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:59,234 INFO L225 Difference]: With dead ends: 588 [2020-07-21 16:01:59,234 INFO L226 Difference]: Without dead ends: 584 [2020-07-21 16:01:59,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1172 GetRequests, 1133 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:01:59,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-07-21 16:01:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 514. [2020-07-21 16:01:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-07-21 16:01:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 966 transitions. [2020-07-21 16:01:59,264 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 966 transitions. Word has length 583 [2020-07-21 16:01:59,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:59,264 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 966 transitions. [2020-07-21 16:01:59,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:01:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 966 transitions. [2020-07-21 16:01:59,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2020-07-21 16:01:59,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:59,269 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 27, 27, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:59,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:59,485 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:59,486 INFO L82 PathProgramCache]: Analyzing trace with hash -301280345, now seen corresponding path program 46 times [2020-07-21 16:01:59,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:59,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346731527] [2020-07-21 16:01:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:02:00,441 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:00,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:00,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:02:00,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8622 backedges. 299 proven. 1086 refuted. 0 times theorem prover too weak. 7237 trivial. 0 not checked. [2020-07-21 16:02:00,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:05,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:05,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:06,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:06,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:07,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:08,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:08,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:08,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:08,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:08,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8622 backedges. 299 proven. 1110 refuted. 0 times theorem prover too weak. 7213 trivial. 0 not checked. [2020-07-21 16:02:08,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346731527] [2020-07-21 16:02:08,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:08,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:02:08,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859005905] [2020-07-21 16:02:08,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:02:08,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:08,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:02:08,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:02:08,810 INFO L87 Difference]: Start difference. First operand 514 states and 966 transitions. Second operand 20 states. [2020-07-21 16:02:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:09,553 INFO L93 Difference]: Finished difference Result 688 states and 1557 transitions. [2020-07-21 16:02:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:02:09,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 547 [2020-07-21 16:02:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:09,565 INFO L225 Difference]: With dead ends: 688 [2020-07-21 16:02:09,566 INFO L226 Difference]: Without dead ends: 684 [2020-07-21 16:02:09,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1061 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:02:09,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2020-07-21 16:02:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 514. [2020-07-21 16:02:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-07-21 16:02:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 966 transitions. [2020-07-21 16:02:09,598 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 966 transitions. Word has length 547 [2020-07-21 16:02:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:09,598 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 966 transitions. [2020-07-21 16:02:09,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:02:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 966 transitions. [2020-07-21 16:02:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2020-07-21 16:02:09,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:09,603 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 45, 45, 27, 27, 25, 25, 25, 25, 25, 25, 25, 23, 22, 22, 22, 22, 22, 22, 22, 18, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:09,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:09,804 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:09,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1546044716, now seen corresponding path program 47 times [2020-07-21 16:02:09,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:09,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984582245] [2020-07-21 16:02:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:02:10,862 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:10,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:10,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:02:10,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11686 backedges. 510 proven. 1097 refuted. 0 times theorem prover too weak. 10079 trivial. 0 not checked. [2020-07-21 16:02:11,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:15,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:17,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:17,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11686 backedges. 512 proven. 1119 refuted. 0 times theorem prover too weak. 10055 trivial. 0 not checked. [2020-07-21 16:02:19,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984582245] [2020-07-21 16:02:19,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:19,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:02:19,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143842543] [2020-07-21 16:02:19,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:02:19,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:19,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:02:19,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:02:19,901 INFO L87 Difference]: Start difference. First operand 514 states and 966 transitions. Second operand 20 states. [2020-07-21 16:02:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:20,729 INFO L93 Difference]: Finished difference Result 577 states and 1137 transitions. [2020-07-21 16:02:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:02:20,732 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 631 [2020-07-21 16:02:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:20,740 INFO L225 Difference]: With dead ends: 577 [2020-07-21 16:02:20,741 INFO L226 Difference]: Without dead ends: 573 [2020-07-21 16:02:20,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1268 GetRequests, 1229 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:02:20,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-07-21 16:02:20,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 509. [2020-07-21 16:02:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-07-21 16:02:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 954 transitions. [2020-07-21 16:02:20,771 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 954 transitions. Word has length 631 [2020-07-21 16:02:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:20,772 INFO L479 AbstractCegarLoop]: Abstraction has 509 states and 954 transitions. [2020-07-21 16:02:20,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:02:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 954 transitions. [2020-07-21 16:02:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2020-07-21 16:02:20,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:20,776 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 39, 39, 27, 27, 23, 23, 23, 23, 23, 23, 23, 19, 19, 19, 19, 19, 19, 19, 19, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:20,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:20,977 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash 63621307, now seen corresponding path program 48 times [2020-07-21 16:02:20,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:20,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26483010] [2020-07-21 16:02:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:02:22,007 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:22,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:02:22,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9502 backedges. 356 proven. 899 refuted. 0 times theorem prover too weak. 8247 trivial. 0 not checked. [2020-07-21 16:02:22,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:26,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:27,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:27,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:28,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:28,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:28,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:28,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:29,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:29,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9502 backedges. 356 proven. 915 refuted. 0 times theorem prover too weak. 8231 trivial. 0 not checked. [2020-07-21 16:02:29,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26483010] [2020-07-21 16:02:29,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:29,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:02:29,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501372167] [2020-07-21 16:02:29,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:02:29,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:29,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:02:29,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:02:29,846 INFO L87 Difference]: Start difference. First operand 509 states and 954 transitions. Second operand 18 states. [2020-07-21 16:02:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:30,496 INFO L93 Difference]: Finished difference Result 608 states and 1216 transitions. [2020-07-21 16:02:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:02:30,500 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 571 [2020-07-21 16:02:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:30,511 INFO L225 Difference]: With dead ends: 608 [2020-07-21 16:02:30,511 INFO L226 Difference]: Without dead ends: 604 [2020-07-21 16:02:30,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 1113 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:02:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-07-21 16:02:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 509. [2020-07-21 16:02:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-07-21 16:02:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 954 transitions. [2020-07-21 16:02:30,542 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 954 transitions. Word has length 571 [2020-07-21 16:02:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:30,543 INFO L479 AbstractCegarLoop]: Abstraction has 509 states and 954 transitions. [2020-07-21 16:02:30,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:02:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 954 transitions. [2020-07-21 16:02:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2020-07-21 16:02:30,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:30,549 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 41, 41, 27, 27, 23, 23, 23, 23, 23, 23, 23, 20, 20, 20, 20, 20, 20, 20, 19, 14, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:30,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:30,750 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1539310000, now seen corresponding path program 49 times [2020-07-21 16:02:30,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:30,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810280338] [2020-07-21 16:02:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:02:31,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:31,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:31,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1299 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:02:31,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9894 backedges. 456 proven. 823 refuted. 0 times theorem prover too weak. 8615 trivial. 0 not checked. [2020-07-21 16:02:32,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:36,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:37,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:38,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:38,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:38,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:38,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:38,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:39,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9894 backedges. 456 proven. 841 refuted. 0 times theorem prover too weak. 8597 trivial. 0 not checked. [2020-07-21 16:02:40,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810280338] [2020-07-21 16:02:40,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:40,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:02:40,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843969381] [2020-07-21 16:02:40,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:02:40,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:40,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:02:40,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:02:40,145 INFO L87 Difference]: Start difference. First operand 509 states and 954 transitions. Second operand 18 states. [2020-07-21 16:02:40,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:40,752 INFO L93 Difference]: Finished difference Result 593 states and 1222 transitions. [2020-07-21 16:02:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:02:40,754 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 583 [2020-07-21 16:02:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:40,760 INFO L225 Difference]: With dead ends: 593 [2020-07-21 16:02:40,761 INFO L226 Difference]: Without dead ends: 589 [2020-07-21 16:02:40,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1171 GetRequests, 1137 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:02:40,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-07-21 16:02:40,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 512. [2020-07-21 16:02:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-07-21 16:02:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 969 transitions. [2020-07-21 16:02:40,789 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 969 transitions. Word has length 583 [2020-07-21 16:02:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:40,789 INFO L479 AbstractCegarLoop]: Abstraction has 512 states and 969 transitions. [2020-07-21 16:02:40,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:02:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 969 transitions. [2020-07-21 16:02:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2020-07-21 16:02:40,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:40,794 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 27, 27, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 21, 20, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:40,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:40,995 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:40,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1679908530, now seen corresponding path program 50 times [2020-07-21 16:02:40,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:40,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989351850] [2020-07-21 16:02:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:02:42,070 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:42,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:42,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:02:42,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11654 backedges. 508 proven. 881 refuted. 0 times theorem prover too weak. 10265 trivial. 0 not checked. [2020-07-21 16:02:42,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:46,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:48,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:48,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:48,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:48,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:48,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:48,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:48,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:48,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:49,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:49,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11654 backedges. 510 proven. 895 refuted. 0 times theorem prover too weak. 10249 trivial. 0 not checked. [2020-07-21 16:02:50,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989351850] [2020-07-21 16:02:50,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:50,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:02:50,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527016222] [2020-07-21 16:02:50,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:02:50,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:50,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:02:50,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:02:50,642 INFO L87 Difference]: Start difference. First operand 512 states and 969 transitions. Second operand 18 states. [2020-07-21 16:02:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:51,301 INFO L93 Difference]: Finished difference Result 591 states and 1217 transitions. [2020-07-21 16:02:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:02:51,305 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 631 [2020-07-21 16:02:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:51,314 INFO L225 Difference]: With dead ends: 591 [2020-07-21 16:02:51,314 INFO L226 Difference]: Without dead ends: 587 [2020-07-21 16:02:51,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1267 GetRequests, 1233 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:02:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-07-21 16:02:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 509. [2020-07-21 16:02:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-07-21 16:02:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 954 transitions. [2020-07-21 16:02:51,345 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 954 transitions. Word has length 631 [2020-07-21 16:02:51,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:51,345 INFO L479 AbstractCegarLoop]: Abstraction has 509 states and 954 transitions. [2020-07-21 16:02:51,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:02:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 954 transitions. [2020-07-21 16:02:51,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2020-07-21 16:02:51,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:51,353 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 44, 27, 27, 24, 24, 24, 24, 24, 24, 24, 22, 22, 22, 22, 22, 22, 22, 22, 17, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:51,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:51,556 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:51,556 INFO L82 PathProgramCache]: Analyzing trace with hash 485523147, now seen corresponding path program 51 times [2020-07-21 16:02:51,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:51,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225115448] [2020-07-21 16:02:51,557 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:02:52,652 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:52,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:52,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:02:52,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11218 backedges. 760 proven. 829 refuted. 0 times theorem prover too weak. 9629 trivial. 0 not checked. [2020-07-21 16:02:53,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:58,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:58,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:59,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:59,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:00,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:00,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:00,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:00,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11218 backedges. 764 proven. 849 refuted. 0 times theorem prover too weak. 9605 trivial. 0 not checked. [2020-07-21 16:03:03,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225115448] [2020-07-21 16:03:03,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:03,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:03:03,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747136736] [2020-07-21 16:03:03,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:03:03,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:03,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:03:03,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:03:03,511 INFO L87 Difference]: Start difference. First operand 509 states and 954 transitions. Second operand 20 states. [2020-07-21 16:03:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:04,330 INFO L93 Difference]: Finished difference Result 562 states and 1111 transitions. [2020-07-21 16:03:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:03:04,333 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 619 [2020-07-21 16:03:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:04,342 INFO L225 Difference]: With dead ends: 562 [2020-07-21 16:03:04,342 INFO L226 Difference]: Without dead ends: 558 [2020-07-21 16:03:04,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1244 GetRequests, 1205 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:03:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2020-07-21 16:03:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 519. [2020-07-21 16:03:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-07-21 16:03:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 993 transitions. [2020-07-21 16:03:04,373 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 993 transitions. Word has length 619 [2020-07-21 16:03:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:04,374 INFO L479 AbstractCegarLoop]: Abstraction has 519 states and 993 transitions. [2020-07-21 16:03:04,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:03:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 993 transitions. [2020-07-21 16:03:04,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2020-07-21 16:03:04,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:04,379 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 48, 48, 27, 27, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 21, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:04,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:04,580 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:04,581 INFO L82 PathProgramCache]: Analyzing trace with hash 449715766, now seen corresponding path program 52 times [2020-07-21 16:03:04,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:04,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786800064] [2020-07-21 16:03:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:03:05,692 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:05,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:05,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:03:05,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12618 backedges. 773 proven. 668 refuted. 0 times theorem prover too weak. 11177 trivial. 0 not checked. [2020-07-21 16:03:06,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:10,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:11,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:11,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:11,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:12,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:12,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:12,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:12,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:12,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:13,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12618 backedges. 777 proven. 680 refuted. 0 times theorem prover too weak. 11161 trivial. 0 not checked. [2020-07-21 16:03:14,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786800064] [2020-07-21 16:03:14,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:14,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:03:14,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788535407] [2020-07-21 16:03:14,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:03:14,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:03:14,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:03:14,964 INFO L87 Difference]: Start difference. First operand 519 states and 993 transitions. Second operand 18 states. [2020-07-21 16:03:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:15,603 INFO L93 Difference]: Finished difference Result 587 states and 1210 transitions. [2020-07-21 16:03:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:03:15,607 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 655 [2020-07-21 16:03:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:15,614 INFO L225 Difference]: With dead ends: 587 [2020-07-21 16:03:15,614 INFO L226 Difference]: Without dead ends: 583 [2020-07-21 16:03:15,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1315 GetRequests, 1281 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:03:15,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2020-07-21 16:03:15,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 528. [2020-07-21 16:03:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-07-21 16:03:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1026 transitions. [2020-07-21 16:03:15,646 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1026 transitions. Word has length 655 [2020-07-21 16:03:15,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:15,646 INFO L479 AbstractCegarLoop]: Abstraction has 528 states and 1026 transitions. [2020-07-21 16:03:15,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:03:15,647 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1026 transitions. [2020-07-21 16:03:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2020-07-21 16:03:15,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:15,652 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 27, 27, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 21, 20, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:15,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:15,853 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:15,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1894732938, now seen corresponding path program 53 times [2020-07-21 16:03:15,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:15,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89113310] [2020-07-21 16:03:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:03:16,988 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:16,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:16,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:03:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11654 backedges. 688 proven. 701 refuted. 0 times theorem prover too weak. 10265 trivial. 0 not checked. [2020-07-21 16:03:17,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:21,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:21,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:22,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:23,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:23,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:23,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:23,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:23,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:23,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:24,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11654 backedges. 690 proven. 715 refuted. 0 times theorem prover too weak. 10249 trivial. 0 not checked. [2020-07-21 16:03:25,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89113310] [2020-07-21 16:03:25,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:25,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:03:25,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515729995] [2020-07-21 16:03:25,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:03:25,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:25,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:03:25,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:03:25,696 INFO L87 Difference]: Start difference. First operand 528 states and 1026 transitions. Second operand 18 states. [2020-07-21 16:03:26,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:26,183 INFO L93 Difference]: Finished difference Result 602 states and 1278 transitions. [2020-07-21 16:03:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:03:26,186 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 631 [2020-07-21 16:03:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:26,192 INFO L225 Difference]: With dead ends: 602 [2020-07-21 16:03:26,192 INFO L226 Difference]: Without dead ends: 598 [2020-07-21 16:03:26,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1267 GetRequests, 1233 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:03:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-07-21 16:03:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 531. [2020-07-21 16:03:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-07-21 16:03:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1041 transitions. [2020-07-21 16:03:26,219 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1041 transitions. Word has length 631 [2020-07-21 16:03:26,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:26,220 INFO L479 AbstractCegarLoop]: Abstraction has 531 states and 1041 transitions. [2020-07-21 16:03:26,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:03:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1041 transitions. [2020-07-21 16:03:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2020-07-21 16:03:26,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:26,224 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 48, 48, 27, 27, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 21, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:26,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:26,425 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:26,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:26,426 INFO L82 PathProgramCache]: Analyzing trace with hash -146924618, now seen corresponding path program 54 times [2020-07-21 16:03:26,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:26,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605798078] [2020-07-21 16:03:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:03:27,484 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:27,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:27,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:03:27,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12618 backedges. 652 proven. 550 refuted. 0 times theorem prover too weak. 11416 trivial. 0 not checked. [2020-07-21 16:03:27,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:31,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:31,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:31,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:31,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:31,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:31,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:31,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:32,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:32,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:32,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12618 backedges. 652 proven. 562 refuted. 0 times theorem prover too weak. 11404 trivial. 0 not checked. [2020-07-21 16:03:34,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605798078] [2020-07-21 16:03:34,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:34,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:03:34,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044506189] [2020-07-21 16:03:34,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:03:34,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:34,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:03:34,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:03:34,416 INFO L87 Difference]: Start difference. First operand 531 states and 1041 transitions. Second operand 16 states. [2020-07-21 16:03:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:34,819 INFO L93 Difference]: Finished difference Result 567 states and 1102 transitions. [2020-07-21 16:03:34,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:03:34,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 655 [2020-07-21 16:03:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:34,828 INFO L225 Difference]: With dead ends: 567 [2020-07-21 16:03:34,828 INFO L226 Difference]: Without dead ends: 563 [2020-07-21 16:03:34,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1285 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:03:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2020-07-21 16:03:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 521. [2020-07-21 16:03:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-07-21 16:03:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 997 transitions. [2020-07-21 16:03:34,853 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 997 transitions. Word has length 655 [2020-07-21 16:03:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:34,853 INFO L479 AbstractCegarLoop]: Abstraction has 521 states and 997 transitions. [2020-07-21 16:03:34,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:03:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 997 transitions. [2020-07-21 16:03:34,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2020-07-21 16:03:34,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:34,858 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 27, 27, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 22, 21, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:35,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:35,059 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash -17825297, now seen corresponding path program 55 times [2020-07-21 16:03:35,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:35,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373339566] [2020-07-21 16:03:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:03:36,117 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:36,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:36,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:03:36,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12126 backedges. 1228 proven. 421 refuted. 0 times theorem prover too weak. 10477 trivial. 0 not checked. [2020-07-21 16:03:36,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:39,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:40,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:40,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:41,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:41,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:41,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:41,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:42,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12126 backedges. 1232 proven. 441 refuted. 0 times theorem prover too weak. 10453 trivial. 0 not checked. [2020-07-21 16:03:45,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373339566] [2020-07-21 16:03:45,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:45,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:03:45,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957570477] [2020-07-21 16:03:45,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:03:45,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:03:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:03:45,282 INFO L87 Difference]: Start difference. First operand 521 states and 997 transitions. Second operand 20 states. [2020-07-21 16:03:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:45,902 INFO L93 Difference]: Finished difference Result 556 states and 1099 transitions. [2020-07-21 16:03:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:03:45,904 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 643 [2020-07-21 16:03:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:45,910 INFO L225 Difference]: With dead ends: 556 [2020-07-21 16:03:45,910 INFO L226 Difference]: Without dead ends: 552 [2020-07-21 16:03:45,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1292 GetRequests, 1253 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:03:45,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-07-21 16:03:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 544. [2020-07-21 16:03:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-07-21 16:03:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1072 transitions. [2020-07-21 16:03:45,935 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1072 transitions. Word has length 643 [2020-07-21 16:03:45,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:45,936 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 1072 transitions. [2020-07-21 16:03:45,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:03:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1072 transitions. [2020-07-21 16:03:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2020-07-21 16:03:45,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:45,941 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 27, 27, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:46,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:46,141 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:46,142 INFO L82 PathProgramCache]: Analyzing trace with hash -967280435, now seen corresponding path program 56 times [2020-07-21 16:03:46,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:46,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823377344] [2020-07-21 16:03:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:03:47,232 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:47,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:03:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13102 backedges. 318 proven. 1848 refuted. 0 times theorem prover too weak. 10936 trivial. 0 not checked. [2020-07-21 16:03:47,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:48,445 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 16:03:54,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:54,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:56,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:59,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:59,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:00,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:00,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:00,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:00,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:00,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:00,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13102 backedges. 318 proven. 1888 refuted. 0 times theorem prover too weak. 10896 trivial. 0 not checked. [2020-07-21 16:04:01,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823377344] [2020-07-21 16:04:01,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:01,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 16:04:01,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896355085] [2020-07-21 16:04:01,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 16:04:01,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:01,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 16:04:01,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:04:01,121 INFO L87 Difference]: Start difference. First operand 544 states and 1072 transitions. Second operand 24 states. [2020-07-21 16:04:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:02,043 INFO L93 Difference]: Finished difference Result 569 states and 1143 transitions. [2020-07-21 16:04:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 16:04:02,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 667 [2020-07-21 16:04:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:02,052 INFO L225 Difference]: With dead ends: 569 [2020-07-21 16:04:02,053 INFO L226 Difference]: Without dead ends: 565 [2020-07-21 16:04:02,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1342 GetRequests, 1293 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:04:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2020-07-21 16:04:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 527. [2020-07-21 16:04:02,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-07-21 16:04:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1016 transitions. [2020-07-21 16:04:02,081 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1016 transitions. Word has length 667 [2020-07-21 16:04:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:02,081 INFO L479 AbstractCegarLoop]: Abstraction has 527 states and 1016 transitions. [2020-07-21 16:04:02,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 16:04:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1016 transitions. [2020-07-21 16:04:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2020-07-21 16:04:02,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:02,088 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 38, 37, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 27, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:02,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:02,289 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:02,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:02,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1103963683, now seen corresponding path program 57 times [2020-07-21 16:04:02,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:02,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972886925] [2020-07-21 16:04:02,291 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:04:03,465 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:04:03,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:03,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 16:04:03,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21721 backedges. 2095 proven. 2686 refuted. 0 times theorem prover too weak. 16940 trivial. 0 not checked. [2020-07-21 16:04:04,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:11,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:12,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:12,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:12,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:12,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:20,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:20,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:23,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:23,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:24,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:24,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:25,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:25,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:25,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:26,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:26,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:26,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21721 backedges. 2095 proven. 2740 refuted. 0 times theorem prover too weak. 16886 trivial. 0 not checked. [2020-07-21 16:04:26,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972886925] [2020-07-21 16:04:26,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:26,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 37 [2020-07-21 16:04:26,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166165596] [2020-07-21 16:04:26,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-21 16:04:26,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:26,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-21 16:04:26,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 16:04:26,892 INFO L87 Difference]: Start difference. First operand 527 states and 1016 transitions. Second operand 37 states. [2020-07-21 16:04:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:32,830 INFO L93 Difference]: Finished difference Result 1118 states and 2429 transitions. [2020-07-21 16:04:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-21 16:04:32,835 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 856 [2020-07-21 16:04:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:32,842 INFO L225 Difference]: With dead ends: 1118 [2020-07-21 16:04:32,843 INFO L226 Difference]: Without dead ends: 595 [2020-07-21 16:04:32,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1742 GetRequests, 1645 SyntacticMatches, 31 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=665, Invalid=3891, Unknown=0, NotChecked=0, Total=4556 [2020-07-21 16:04:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-07-21 16:04:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 457. [2020-07-21 16:04:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-07-21 16:04:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 762 transitions. [2020-07-21 16:04:32,884 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 762 transitions. Word has length 856 [2020-07-21 16:04:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:32,885 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 762 transitions. [2020-07-21 16:04:32,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-21 16:04:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 762 transitions. [2020-07-21 16:04:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-07-21 16:04:32,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:32,895 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 58, 58, 44, 44, 33, 33, 33, 33, 33, 33, 33, 29, 29, 29, 29, 29, 29, 29, 23, 15, 14, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:33,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:33,096 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:33,097 INFO L82 PathProgramCache]: Analyzing trace with hash -493123313, now seen corresponding path program 58 times [2020-07-21 16:04:33,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:33,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005932916] [2020-07-21 16:04:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:04:34,336 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:04:34,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:04:34,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 21084 backedges. 384 proven. 2481 refuted. 0 times theorem prover too weak. 18219 trivial. 0 not checked. [2020-07-21 16:04:34,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:37,860 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:04:46,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:50,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:53,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:53,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:55,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:55,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:56,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:56,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:57,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:57,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:57,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:57,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:57,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:57,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21084 backedges. 384 proven. 2525 refuted. 0 times theorem prover too weak. 18175 trivial. 0 not checked. [2020-07-21 16:04:58,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005932916] [2020-07-21 16:04:58,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:58,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 16:04:58,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316764359] [2020-07-21 16:04:58,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 16:04:58,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:58,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 16:04:58,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:04:58,208 INFO L87 Difference]: Start difference. First operand 457 states and 762 transitions. Second operand 24 states. [2020-07-21 16:04:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:59,344 INFO L93 Difference]: Finished difference Result 504 states and 878 transitions. [2020-07-21 16:04:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 16:04:59,348 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 845 [2020-07-21 16:04:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:59,353 INFO L225 Difference]: With dead ends: 504 [2020-07-21 16:04:59,354 INFO L226 Difference]: Without dead ends: 500 [2020-07-21 16:04:59,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1698 GetRequests, 1649 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:04:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2020-07-21 16:04:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 497. [2020-07-21 16:04:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-07-21 16:04:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 866 transitions. [2020-07-21 16:04:59,392 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 866 transitions. Word has length 845 [2020-07-21 16:04:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:59,393 INFO L479 AbstractCegarLoop]: Abstraction has 497 states and 866 transitions. [2020-07-21 16:04:59,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 16:04:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 866 transitions. [2020-07-21 16:04:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1337 [2020-07-21 16:04:59,416 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:59,418 INFO L422 BasicCegarLoop]: trace histogram [104, 104, 95, 95, 69, 66, 52, 52, 52, 52, 52, 52, 52, 47, 47, 47, 47, 47, 47, 47, 38, 26, 19, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:59,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:59,633 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:59,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:59,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1822890944, now seen corresponding path program 59 times [2020-07-21 16:04:59,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:59,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386617021] [2020-07-21 16:04:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:05:00,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:05:00,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:05:00,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1976 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 16:05:01,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:05:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 53403 backedges. 28186 proven. 1933 refuted. 0 times theorem prover too weak. 23284 trivial. 0 not checked. [2020-07-21 16:05:02,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:05:06,579 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:05:06,685 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:05:29,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:29,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:31,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:31,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:32,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:33,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:33,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:33,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:33,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:33,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:38,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:38,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:39,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:39,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:40,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:40,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:41,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:41,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:41,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:41,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:41,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 53403 backedges. 1581 proven. 5639 refuted. 0 times theorem prover too weak. 46183 trivial. 0 not checked. [2020-07-21 16:05:42,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386617021] [2020-07-21 16:05:42,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:05:42,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 33 [2020-07-21 16:05:42,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329078434] [2020-07-21 16:05:42,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 16:05:42,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:05:42,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 16:05:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:05:42,474 INFO L87 Difference]: Start difference. First operand 497 states and 866 transitions. Second operand 33 states. [2020-07-21 16:05:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:05:48,702 INFO L93 Difference]: Finished difference Result 1229 states and 2359 transitions. [2020-07-21 16:05:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-21 16:05:48,705 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1336 [2020-07-21 16:05:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:05:48,714 INFO L225 Difference]: With dead ends: 1229 [2020-07-21 16:05:48,714 INFO L226 Difference]: Without dead ends: 666 [2020-07-21 16:05:48,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2703 GetRequests, 2613 SyntacticMatches, 27 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=635, Invalid=3525, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 16:05:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2020-07-21 16:05:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 594. [2020-07-21 16:05:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-07-21 16:05:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1102 transitions. [2020-07-21 16:05:48,747 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1102 transitions. Word has length 1336 [2020-07-21 16:05:48,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:05:48,747 INFO L479 AbstractCegarLoop]: Abstraction has 594 states and 1102 transitions. [2020-07-21 16:05:48,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 16:05:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1102 transitions. [2020-07-21 16:05:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1428 [2020-07-21 16:05:48,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:05:48,767 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 106, 106, 65, 65, 54, 54, 54, 54, 54, 54, 54, 53, 53, 53, 53, 53, 53, 53, 44, 41, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:05:48,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:48,968 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:05:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:05:48,969 INFO L82 PathProgramCache]: Analyzing trace with hash 313652260, now seen corresponding path program 60 times [2020-07-21 16:05:48,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:05:48,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488099060] [2020-07-21 16:05:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:05:50,495 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:05:50,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:05:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 2098 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 16:05:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:05:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 61200 backedges. 2956 proven. 5467 refuted. 0 times theorem prover too weak. 52777 trivial. 0 not checked. [2020-07-21 16:05:51,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:05:57,990 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 16:06:07,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:07,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:11,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:14,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:15,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:15,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:16,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:17,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:17,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:17,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:18,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:26,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:26,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:30,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:30,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:31,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:32,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:32,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:32,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:33,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:33,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 61200 backedges. 2962 proven. 5518 refuted. 0 times theorem prover too weak. 52720 trivial. 0 not checked. [2020-07-21 16:06:34,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488099060] [2020-07-21 16:06:34,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:06:34,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 39 [2020-07-21 16:06:34,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663420141] [2020-07-21 16:06:34,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-21 16:06:34,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:06:34,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-21 16:06:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 16:06:34,737 INFO L87 Difference]: Start difference. First operand 594 states and 1102 transitions. Second operand 39 states. [2020-07-21 16:06:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:06:44,981 INFO L93 Difference]: Finished difference Result 1535 states and 3350 transitions. [2020-07-21 16:06:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-21 16:06:44,986 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 1427 [2020-07-21 16:06:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:06:45,000 INFO L225 Difference]: With dead ends: 1535 [2020-07-21 16:06:45,001 INFO L226 Difference]: Without dead ends: 947 [2020-07-21 16:06:45,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2892 GetRequests, 2787 SyntacticMatches, 29 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=848, Invalid=5158, Unknown=0, NotChecked=0, Total=6006 [2020-07-21 16:06:45,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2020-07-21 16:06:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 843. [2020-07-21 16:06:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-07-21 16:06:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1852 transitions. [2020-07-21 16:06:45,116 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1852 transitions. Word has length 1427 [2020-07-21 16:06:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:06:45,117 INFO L479 AbstractCegarLoop]: Abstraction has 843 states and 1852 transitions. [2020-07-21 16:06:45,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-21 16:06:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1852 transitions. [2020-07-21 16:06:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1051 [2020-07-21 16:06:45,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:06:45,144 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 70, 70, 51, 50, 43, 43, 43, 43, 43, 43, 43, 36, 35, 35, 35, 35, 35, 35, 35, 20, 16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:06:45,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:06:45,357 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:06:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:06:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash 758243929, now seen corresponding path program 61 times [2020-07-21 16:06:45,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:06:45,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120401637] [2020-07-21 16:06:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:06:46,938 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:06:46,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:06:46,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 16:06:46,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:06:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 33116 backedges. 15866 proven. 1659 refuted. 0 times theorem prover too weak. 15591 trivial. 0 not checked. [2020-07-21 16:06:47,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:07:00,771 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:07:00,884 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:07:01,000 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:07:01,869 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:07:03,482 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:07:03,586 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:07:07,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:09,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:09,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:10,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:10,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:11,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:11,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:11,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:12,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:12,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:16,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:16,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:16,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:16,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:17,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:17,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:17,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:17,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:18,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 33116 backedges. 1926 proven. 3310 refuted. 0 times theorem prover too weak. 27880 trivial. 0 not checked. [2020-07-21 16:07:20,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120401637] [2020-07-21 16:07:20,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:07:20,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 31 [2020-07-21 16:07:20,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994652020] [2020-07-21 16:07:20,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 16:07:20,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:07:20,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 16:07:20,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-07-21 16:07:20,332 INFO L87 Difference]: Start difference. First operand 843 states and 1852 transitions. Second operand 31 states. [2020-07-21 16:07:22,288 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2020-07-21 16:07:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:07:26,926 INFO L93 Difference]: Finished difference Result 2052 states and 5233 transitions. [2020-07-21 16:07:26,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-21 16:07:26,932 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 1050 [2020-07-21 16:07:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:07:26,959 INFO L225 Difference]: With dead ends: 2052 [2020-07-21 16:07:26,959 INFO L226 Difference]: Without dead ends: 1156 [2020-07-21 16:07:26,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2131 GetRequests, 2045 SyntacticMatches, 25 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=610, Invalid=3296, Unknown=0, NotChecked=0, Total=3906 [2020-07-21 16:07:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2020-07-21 16:07:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 885. [2020-07-21 16:07:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 885 states. [2020-07-21 16:07:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1987 transitions. [2020-07-21 16:07:27,083 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1987 transitions. Word has length 1050 [2020-07-21 16:07:27,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:07:27,084 INFO L479 AbstractCegarLoop]: Abstraction has 885 states and 1987 transitions. [2020-07-21 16:07:27,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 16:07:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1987 transitions. [2020-07-21 16:07:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2020-07-21 16:07:27,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:07:27,107 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 51, 50, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 28, 26, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:07:27,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:07:27,322 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:07:27,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:07:27,323 INFO L82 PathProgramCache]: Analyzing trace with hash 470553472, now seen corresponding path program 62 times [2020-07-21 16:07:27,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:07:27,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859946823] [2020-07-21 16:07:27,325 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:07:28,837 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:07:28,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:07:28,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 16:07:28,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:07:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 31992 backedges. 16050 proven. 1841 refuted. 0 times theorem prover too weak. 14101 trivial. 0 not checked. [2020-07-21 16:07:30,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:07:34,744 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:07:45,524 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:07:45,629 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:07:48,079 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:07:48,185 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:07:52,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:54,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:54,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:55,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:55,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:56,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:56,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:56,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:56,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:56,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:56,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:02,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:02,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:04,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:04,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:05,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:05,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:05,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:05,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:06,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 31992 backedges. 1690 proven. 3816 refuted. 0 times theorem prover too weak. 26486 trivial. 0 not checked. [2020-07-21 16:08:07,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859946823] [2020-07-21 16:08:07,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:08:07,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 33 [2020-07-21 16:08:07,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139927876] [2020-07-21 16:08:07,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 16:08:07,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:08:07,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 16:08:07,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:08:07,486 INFO L87 Difference]: Start difference. First operand 885 states and 1987 transitions. Second operand 33 states. [2020-07-21 16:08:14,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:08:14,631 INFO L93 Difference]: Finished difference Result 2331 states and 5804 transitions. [2020-07-21 16:08:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-21 16:08:14,637 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1038 [2020-07-21 16:08:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:08:14,657 INFO L225 Difference]: With dead ends: 2331 [2020-07-21 16:08:14,658 INFO L226 Difference]: Without dead ends: 1345 [2020-07-21 16:08:14,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2107 GetRequests, 2017 SyntacticMatches, 27 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=620, Invalid=3540, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 16:08:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2020-07-21 16:08:14,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 914. [2020-07-21 16:08:14,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 914 states. [2020-07-21 16:08:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2060 transitions. [2020-07-21 16:08:14,749 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2060 transitions. Word has length 1038 [2020-07-21 16:08:14,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:08:14,749 INFO L479 AbstractCegarLoop]: Abstraction has 914 states and 2060 transitions. [2020-07-21 16:08:14,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 16:08:14,749 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2060 transitions. [2020-07-21 16:08:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1123 [2020-07-21 16:08:14,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:08:14,764 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 76, 76, 51, 50, 46, 46, 46, 46, 46, 46, 46, 42, 38, 38, 38, 38, 38, 38, 38, 26, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:08:14,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:08:14,965 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:08:14,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:08:14,966 INFO L82 PathProgramCache]: Analyzing trace with hash -663257203, now seen corresponding path program 63 times [2020-07-21 16:08:14,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:08:14,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417815634] [2020-07-21 16:08:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:08:16,558 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:08:16,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:08:16,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 16:08:16,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:08:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 37964 backedges. 18117 proven. 1500 refuted. 0 times theorem prover too weak. 18347 trivial. 0 not checked. [2020-07-21 16:08:17,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:08:36,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:36,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:37,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:37,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:38,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:38,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:38,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:38,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:39,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:44,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:44,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:45,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:45,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:45,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:46,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:46,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:46,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 37964 backedges. 1741 proven. 3027 refuted. 0 times theorem prover too weak. 33196 trivial. 0 not checked. [2020-07-21 16:08:49,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417815634] [2020-07-21 16:08:49,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:08:49,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 16:08:49,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222059344] [2020-07-21 16:08:49,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 16:08:49,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:08:49,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 16:08:49,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:08:49,053 INFO L87 Difference]: Start difference. First operand 914 states and 2060 transitions. Second operand 27 states. [2020-07-21 16:08:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:08:53,735 INFO L93 Difference]: Finished difference Result 2284 states and 6065 transitions. [2020-07-21 16:08:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 16:08:53,742 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 1122 [2020-07-21 16:08:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:08:53,761 INFO L225 Difference]: With dead ends: 2284 [2020-07-21 16:08:53,762 INFO L226 Difference]: Without dead ends: 1294 [2020-07-21 16:08:53,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2268 GetRequests, 2197 SyntacticMatches, 21 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=438, Invalid=2214, Unknown=0, NotChecked=0, Total=2652 [2020-07-21 16:08:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2020-07-21 16:08:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 918. [2020-07-21 16:08:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2020-07-21 16:08:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 2068 transitions. [2020-07-21 16:08:53,872 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 2068 transitions. Word has length 1122 [2020-07-21 16:08:53,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:08:53,873 INFO L479 AbstractCegarLoop]: Abstraction has 918 states and 2068 transitions. [2020-07-21 16:08:53,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 16:08:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 2068 transitions. [2020-07-21 16:08:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1050 [2020-07-21 16:08:53,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:08:53,892 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 76, 76, 44, 44, 41, 41, 41, 41, 41, 41, 41, 39, 38, 38, 38, 38, 38, 38, 38, 32, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:08:54,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:08:54,106 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:08:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:08:54,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1518427196, now seen corresponding path program 64 times [2020-07-21 16:08:54,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:08:54,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80779319] [2020-07-21 16:08:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:08:55,793 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:08:55,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:08:55,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 2339 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:08:55,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:08:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 32996 backedges. 618 proven. 2182 refuted. 0 times theorem prover too weak. 30196 trivial. 0 not checked. [2020-07-21 16:08:56,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:09:01,160 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 16:09:01,366 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:09:01,476 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:09:01,583 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:09:12,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:12,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:18,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:18,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:21,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:21,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:23,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:23,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:23,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:23,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:23,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:23,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:24,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32996 backedges. 618 proven. 2206 refuted. 0 times theorem prover too weak. 30172 trivial. 0 not checked. [2020-07-21 16:09:25,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80779319] [2020-07-21 16:09:25,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:09:25,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:09:25,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442088868] [2020-07-21 16:09:25,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:09:25,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:09:25,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:09:25,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:09:25,923 INFO L87 Difference]: Start difference. First operand 918 states and 2068 transitions. Second operand 20 states. [2020-07-21 16:09:27,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:09:27,352 INFO L93 Difference]: Finished difference Result 1092 states and 2686 transitions. [2020-07-21 16:09:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:09:27,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1049 [2020-07-21 16:09:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:09:27,373 INFO L225 Difference]: With dead ends: 1092 [2020-07-21 16:09:27,373 INFO L226 Difference]: Without dead ends: 1088 [2020-07-21 16:09:27,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2104 GetRequests, 2065 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:09:27,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2020-07-21 16:09:27,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 884. [2020-07-21 16:09:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 884 states. [2020-07-21 16:09:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1981 transitions. [2020-07-21 16:09:27,439 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1981 transitions. Word has length 1049 [2020-07-21 16:09:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:09:27,440 INFO L479 AbstractCegarLoop]: Abstraction has 884 states and 1981 transitions. [2020-07-21 16:09:27,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:09:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1981 transitions. [2020-07-21 16:09:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1444 [2020-07-21 16:09:27,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:09:27,462 INFO L422 BasicCegarLoop]: trace histogram [116, 116, 103, 103, 62, 60, 58, 58, 58, 58, 58, 58, 58, 56, 51, 51, 51, 51, 51, 51, 51, 41, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:09:27,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:09:27,663 INFO L427 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:09:27,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:09:27,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1379426926, now seen corresponding path program 65 times [2020-07-21 16:09:27,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:09:27,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230572650] [2020-07-21 16:09:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:09:29,390 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:09:29,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:09:29,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 16:09:29,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:09:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 63065 backedges. 33056 proven. 2198 refuted. 0 times theorem prover too weak. 27811 trivial. 0 not checked. [2020-07-21 16:09:31,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:09:33,803 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:09:36,602 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:09:36,712 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:09:36,819 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:09:56,626 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:09:56,739 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:09:56,860 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:09:56,981 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:09:58,790 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 16:09:59,358 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:10:00,017 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:10:00,139 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:10:00,264 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:10:00,388 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:10:00,509 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:10:00,617 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 16:10:05,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:08,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:09,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:10,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:11,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:11,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:11,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:11,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts