/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:29:06,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:29:06,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:29:06,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:29:06,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:29:06,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:29:06,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:29:06,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:29:06,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:29:06,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:29:06,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:29:06,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:29:06,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:29:06,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:29:06,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:29:06,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:29:06,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:29:06,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:29:06,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:29:06,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:29:06,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:29:06,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:29:06,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:29:06,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:29:06,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:29:06,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:29:06,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:29:06,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:29:06,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:29:06,947 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:29:06,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:29:06,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:29:06,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:29:06,948 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:29:06,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:29:06,949 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:29:06,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:29:06,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:29:06,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:29:06,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:29:06,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:29:06,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:29:06,950 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:29:06,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:29:06,951 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:29:06,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:29:06,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:29:06,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:29:06,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:29:06,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:29:06,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:29:06,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:29:06,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:29:06,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:29:06,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:29:06,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:06,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:29:06,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:29:06,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:29:07,225 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:29:07,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:29:07,249 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:29:07,251 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:29:07,251 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:29:07,252 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-07-20 22:29:07,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9bd087c6/fa2654c54e234739b6c5cdc689a6f529/FLAG39229c75c [2020-07-20 22:29:07,747 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:29:07,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2020-07-20 22:29:07,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9bd087c6/fa2654c54e234739b6c5cdc689a6f529/FLAG39229c75c [2020-07-20 22:29:08,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9bd087c6/fa2654c54e234739b6c5cdc689a6f529 [2020-07-20 22:29:08,140 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:29:08,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:29:08,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:29:08,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:29:08,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:29:08,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:29:08" (1/1) ... [2020-07-20 22:29:08,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c488a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:08, skipping insertion in model container [2020-07-20 22:29:08,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:29:08" (1/1) ... [2020-07-20 22:29:08,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:29:08,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:29:08,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:29:08,323 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:29:08,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:29:08,356 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:29:08,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:08 WrapperNode [2020-07-20 22:29:08,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:29:08,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:29:08,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:29:08,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:29:08,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:08" (1/1) ... [2020-07-20 22:29:08,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:08" (1/1) ... [2020-07-20 22:29:08,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:08" (1/1) ... [2020-07-20 22:29:08,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:08" (1/1) ... [2020-07-20 22:29:08,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:08" (1/1) ... [2020-07-20 22:29:08,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:08" (1/1) ... [2020-07-20 22:29:08,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:08" (1/1) ... [2020-07-20 22:29:08,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:29:08,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:29:08,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:29:08,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:29:08,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:29:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:29:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:29:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:29:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:29:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:29:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:29:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:29:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:29:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:29:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:29:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:29:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:29:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:29:08,817 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:29:08,818 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 22:29:08,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:29:08 BoogieIcfgContainer [2020-07-20 22:29:08,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:29:08,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:29:08,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:29:08,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:29:08,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:29:08" (1/3) ... [2020-07-20 22:29:08,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795fbafb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:29:08, skipping insertion in model container [2020-07-20 22:29:08,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:29:08" (2/3) ... [2020-07-20 22:29:08,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795fbafb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:29:08, skipping insertion in model container [2020-07-20 22:29:08,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:29:08" (3/3) ... [2020-07-20 22:29:08,845 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-07-20 22:29:08,860 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:29:08,866 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:29:08,879 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:29:08,902 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:29:08,903 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:29:08,903 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:29:08,903 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:29:08,903 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:29:08,903 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:29:08,904 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:29:08,904 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:29:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 22:29:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 22:29:08,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:08,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:08,930 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:08,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1671060194, now seen corresponding path program 1 times [2020-07-20 22:29:08,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:08,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437418135] [2020-07-20 22:29:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:09,022 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:09,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:29:09,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:29:09,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:09,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437418135] [2020-07-20 22:29:09,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:09,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:29:09,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299338669] [2020-07-20 22:29:09,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:29:09,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:09,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:29:09,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:29:09,113 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-07-20 22:29:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:09,185 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2020-07-20 22:29:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:29:09,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-20 22:29:09,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:09,196 INFO L225 Difference]: With dead ends: 53 [2020-07-20 22:29:09,196 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 22:29:09,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:29:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 22:29:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-07-20 22:29:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 22:29:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-07-20 22:29:09,240 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-07-20 22:29:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:09,240 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-07-20 22:29:09,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:29:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-07-20 22:29:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 22:29:09,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:09,242 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:09,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:09,458 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:09,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:09,458 INFO L82 PathProgramCache]: Analyzing trace with hash 514965223, now seen corresponding path program 1 times [2020-07-20 22:29:09,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:09,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432889909] [2020-07-20 22:29:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:09,497 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:09,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:09,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:29:09,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:09,562 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:09,575 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:29:09,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:09,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432889909] [2020-07-20 22:29:09,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:09,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:29:09,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806722820] [2020-07-20 22:29:09,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:29:09,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:09,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:29:09,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:29:09,636 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2020-07-20 22:29:09,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:09,747 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-07-20 22:29:09,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:29:09,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-20 22:29:09,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:09,749 INFO L225 Difference]: With dead ends: 46 [2020-07-20 22:29:09,749 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 22:29:09,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:29:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 22:29:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-07-20 22:29:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 22:29:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-07-20 22:29:09,759 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2020-07-20 22:29:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:09,760 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-07-20 22:29:09,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:29:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-20 22:29:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 22:29:09,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:09,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:09,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:09,976 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:09,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1134636734, now seen corresponding path program 1 times [2020-07-20 22:29:09,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:09,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799190851] [2020-07-20 22:29:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:10,011 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:10,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:10,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:29:10,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:29:10,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:29:10,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799190851] [2020-07-20 22:29:10,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:29:10,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 22:29:10,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80528209] [2020-07-20 22:29:10,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:29:10,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:10,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:29:10,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:29:10,122 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-07-20 22:29:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:10,330 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-07-20 22:29:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:29:10,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-07-20 22:29:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:10,338 INFO L225 Difference]: With dead ends: 68 [2020-07-20 22:29:10,339 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 22:29:10,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:29:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 22:29:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2020-07-20 22:29:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 22:29:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-07-20 22:29:10,362 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-07-20 22:29:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:10,363 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-07-20 22:29:10,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:29:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-07-20 22:29:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 22:29:10,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:10,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:10,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:10,571 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash -670641491, now seen corresponding path program 1 times [2020-07-20 22:29:10,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:10,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294207148] [2020-07-20 22:29:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:10,611 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:10,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:10,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 22:29:10,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:10,675 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:10,678 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 22:29:10,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:10,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 22:29:10,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294207148] [2020-07-20 22:29:10,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:10,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-07-20 22:29:10,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463561185] [2020-07-20 22:29:10,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 22:29:10,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:10,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 22:29:10,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-07-20 22:29:10,825 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 16 states. [2020-07-20 22:29:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:11,240 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2020-07-20 22:29:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 22:29:11,241 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-07-20 22:29:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:11,245 INFO L225 Difference]: With dead ends: 105 [2020-07-20 22:29:11,245 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 22:29:11,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2020-07-20 22:29:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 22:29:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-07-20 22:29:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 22:29:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-07-20 22:29:11,276 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 41 [2020-07-20 22:29:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:11,277 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-07-20 22:29:11,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 22:29:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-07-20 22:29:11,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 22:29:11,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:11,284 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:11,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:11,485 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:11,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1941695900, now seen corresponding path program 2 times [2020-07-20 22:29:11,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:11,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331790182] [2020-07-20 22:29:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:11,534 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:11,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:11,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 22:29:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-20 22:29:11,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 17 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-07-20 22:29:11,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331790182] [2020-07-20 22:29:11,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:11,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-20 22:29:11,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986941443] [2020-07-20 22:29:11,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 22:29:11,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:11,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 22:29:11,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-07-20 22:29:11,769 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 15 states. [2020-07-20 22:29:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:12,223 INFO L93 Difference]: Finished difference Result 131 states and 165 transitions. [2020-07-20 22:29:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 22:29:12,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-07-20 22:29:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:12,226 INFO L225 Difference]: With dead ends: 131 [2020-07-20 22:29:12,226 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 22:29:12,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2020-07-20 22:29:12,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 22:29:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2020-07-20 22:29:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 22:29:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-07-20 22:29:12,245 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 62 [2020-07-20 22:29:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:12,245 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-07-20 22:29:12,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 22:29:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-07-20 22:29:12,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 22:29:12,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:12,247 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:12,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:12,462 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:12,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1833574291, now seen corresponding path program 3 times [2020-07-20 22:29:12,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:12,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633516718] [2020-07-20 22:29:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:12,513 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:12,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:12,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 22:29:12,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 78 proven. 59 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-20 22:29:12,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-07-20 22:29:12,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633516718] [2020-07-20 22:29:12,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:12,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-07-20 22:29:12,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500840109] [2020-07-20 22:29:12,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 22:29:12,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:12,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 22:29:12,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-07-20 22:29:12,848 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 19 states. [2020-07-20 22:29:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:13,628 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2020-07-20 22:29:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 22:29:13,629 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-07-20 22:29:13,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:13,631 INFO L225 Difference]: With dead ends: 139 [2020-07-20 22:29:13,631 INFO L226 Difference]: Without dead ends: 106 [2020-07-20 22:29:13,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=353, Invalid=1053, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 22:29:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-20 22:29:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2020-07-20 22:29:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 22:29:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2020-07-20 22:29:13,670 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 79 [2020-07-20 22:29:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:13,672 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2020-07-20 22:29:13,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 22:29:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2020-07-20 22:29:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-20 22:29:13,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:13,681 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:13,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:13,882 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:13,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:13,883 INFO L82 PathProgramCache]: Analyzing trace with hash -832577267, now seen corresponding path program 4 times [2020-07-20 22:29:13,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:13,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116423185] [2020-07-20 22:29:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:13,922 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:13,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:13,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 22:29:13,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 215 proven. 33 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-07-20 22:29:14,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 131 proven. 45 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-07-20 22:29:14,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116423185] [2020-07-20 22:29:14,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:14,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-07-20 22:29:14,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679204823] [2020-07-20 22:29:14,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 22:29:14,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:14,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 22:29:14,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-07-20 22:29:14,178 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand 16 states. [2020-07-20 22:29:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:14,509 INFO L93 Difference]: Finished difference Result 163 states and 204 transitions. [2020-07-20 22:29:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 22:29:14,509 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-07-20 22:29:14,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:14,511 INFO L225 Difference]: With dead ends: 163 [2020-07-20 22:29:14,511 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 22:29:14,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2020-07-20 22:29:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 22:29:14,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-07-20 22:29:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-20 22:29:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2020-07-20 22:29:14,539 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 99 [2020-07-20 22:29:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:14,539 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2020-07-20 22:29:14,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 22:29:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2020-07-20 22:29:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 22:29:14,541 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:14,541 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:14,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:14,755 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:14,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:14,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1419871984, now seen corresponding path program 5 times [2020-07-20 22:29:14,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:14,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448012144] [2020-07-20 22:29:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:14,805 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:14,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 22:29:14,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 110 proven. 120 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-07-20 22:29:14,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 75 proven. 121 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2020-07-20 22:29:15,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448012144] [2020-07-20 22:29:15,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:15,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2020-07-20 22:29:15,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190749714] [2020-07-20 22:29:15,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 22:29:15,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:15,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 22:29:15,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-07-20 22:29:15,090 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 18 states. [2020-07-20 22:29:16,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:16,054 INFO L93 Difference]: Finished difference Result 168 states and 210 transitions. [2020-07-20 22:29:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 22:29:16,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 106 [2020-07-20 22:29:16,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:16,056 INFO L225 Difference]: With dead ends: 168 [2020-07-20 22:29:16,056 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 22:29:16,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 191 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=472, Invalid=1508, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 22:29:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 22:29:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-07-20 22:29:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 22:29:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 119 transitions. [2020-07-20 22:29:16,087 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 119 transitions. Word has length 106 [2020-07-20 22:29:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:16,089 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 119 transitions. [2020-07-20 22:29:16,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 22:29:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 119 transitions. [2020-07-20 22:29:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-20 22:29:16,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:16,094 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:16,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:16,307 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1976134303, now seen corresponding path program 6 times [2020-07-20 22:29:16,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:16,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119891706] [2020-07-20 22:29:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:16,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:16,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 22:29:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 334 proven. 60 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-20 22:29:16,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 214 proven. 60 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-07-20 22:29:16,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119891706] [2020-07-20 22:29:16,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:16,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-20 22:29:16,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040548425] [2020-07-20 22:29:16,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 22:29:16,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:16,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 22:29:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-07-20 22:29:16,648 INFO L87 Difference]: Start difference. First operand 99 states and 119 transitions. Second operand 15 states. [2020-07-20 22:29:17,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:17,106 INFO L93 Difference]: Finished difference Result 186 states and 227 transitions. [2020-07-20 22:29:17,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 22:29:17,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 123 [2020-07-20 22:29:17,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:17,108 INFO L225 Difference]: With dead ends: 186 [2020-07-20 22:29:17,108 INFO L226 Difference]: Without dead ends: 99 [2020-07-20 22:29:17,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2020-07-20 22:29:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-20 22:29:17,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-07-20 22:29:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 22:29:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2020-07-20 22:29:17,123 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 123 [2020-07-20 22:29:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:17,123 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2020-07-20 22:29:17,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 22:29:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2020-07-20 22:29:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-20 22:29:17,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:17,125 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:17,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:17,326 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:17,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1688384554, now seen corresponding path program 7 times [2020-07-20 22:29:17,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:17,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216636900] [2020-07-20 22:29:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:17,373 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:17,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:17,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 22:29:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 65 proven. 267 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-07-20 22:29:17,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 64 proven. 268 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-07-20 22:29:17,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216636900] [2020-07-20 22:29:17,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:17,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-07-20 22:29:17,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984215151] [2020-07-20 22:29:17,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 22:29:17,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:17,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 22:29:17,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-07-20 22:29:17,745 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand 22 states. [2020-07-20 22:29:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:19,284 INFO L93 Difference]: Finished difference Result 184 states and 228 transitions. [2020-07-20 22:29:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-20 22:29:19,285 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 130 [2020-07-20 22:29:19,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:19,287 INFO L225 Difference]: With dead ends: 184 [2020-07-20 22:29:19,288 INFO L226 Difference]: Without dead ends: 141 [2020-07-20 22:29:19,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 235 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=721, Invalid=2359, Unknown=0, NotChecked=0, Total=3080 [2020-07-20 22:29:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-07-20 22:29:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 107. [2020-07-20 22:29:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 22:29:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2020-07-20 22:29:19,315 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 130 [2020-07-20 22:29:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:19,316 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2020-07-20 22:29:19,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 22:29:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2020-07-20 22:29:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-07-20 22:29:19,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:19,318 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:19,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:19,531 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:19,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:19,532 INFO L82 PathProgramCache]: Analyzing trace with hash -840848228, now seen corresponding path program 8 times [2020-07-20 22:29:19,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:19,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763119356] [2020-07-20 22:29:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:19,582 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:19,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:19,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 22:29:19,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 551 proven. 122 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-07-20 22:29:19,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 288 proven. 201 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2020-07-20 22:29:19,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763119356] [2020-07-20 22:29:19,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:19,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-07-20 22:29:19,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662694157] [2020-07-20 22:29:19,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 22:29:19,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:19,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 22:29:19,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-07-20 22:29:19,916 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand 19 states. [2020-07-20 22:29:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:20,756 INFO L93 Difference]: Finished difference Result 206 states and 253 transitions. [2020-07-20 22:29:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 22:29:20,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 154 [2020-07-20 22:29:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:20,760 INFO L225 Difference]: With dead ends: 206 [2020-07-20 22:29:20,760 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 22:29:20,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 290 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=537, Invalid=1185, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 22:29:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 22:29:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-07-20 22:29:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-20 22:29:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2020-07-20 22:29:20,782 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 154 [2020-07-20 22:29:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:20,782 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2020-07-20 22:29:20,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 22:29:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2020-07-20 22:29:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-20 22:29:20,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:20,785 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:20,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:20,998 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1311982393, now seen corresponding path program 9 times [2020-07-20 22:29:20,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:20,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515198280] [2020-07-20 22:29:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:21,057 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:21,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:21,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 22:29:21,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:21,185 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:21,186 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:29:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 469 proven. 33 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2020-07-20 22:29:21,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:21,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:29:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 83 proven. 419 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2020-07-20 22:29:21,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515198280] [2020-07-20 22:29:21,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:21,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2020-07-20 22:29:21,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980007554] [2020-07-20 22:29:21,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 22:29:21,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:21,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 22:29:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-07-20 22:29:21,477 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 23 states. [2020-07-20 22:29:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:22,293 INFO L93 Difference]: Finished difference Result 165 states and 201 transitions. [2020-07-20 22:29:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 22:29:22,294 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 161 [2020-07-20 22:29:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:22,296 INFO L225 Difference]: With dead ends: 165 [2020-07-20 22:29:22,297 INFO L226 Difference]: Without dead ends: 163 [2020-07-20 22:29:22,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 307 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=725, Invalid=1627, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 22:29:22,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-20 22:29:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 136. [2020-07-20 22:29:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 22:29:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 166 transitions. [2020-07-20 22:29:22,317 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 166 transitions. Word has length 161 [2020-07-20 22:29:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:22,317 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 166 transitions. [2020-07-20 22:29:22,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 22:29:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 166 transitions. [2020-07-20 22:29:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-07-20 22:29:22,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:22,320 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:22,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:22,536 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:22,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash -90659728, now seen corresponding path program 10 times [2020-07-20 22:29:22,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:22,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528317451] [2020-07-20 22:29:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:22,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:22,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:22,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 22:29:22,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1885 backedges. 621 proven. 517 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2020-07-20 22:29:22,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1885 backedges. 340 proven. 518 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-07-20 22:29:23,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528317451] [2020-07-20 22:29:23,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:23,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2020-07-20 22:29:23,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363658853] [2020-07-20 22:29:23,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 22:29:23,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:23,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 22:29:23,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-07-20 22:29:23,121 INFO L87 Difference]: Start difference. First operand 136 states and 166 transitions. Second operand 26 states. [2020-07-20 22:29:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:25,053 INFO L93 Difference]: Finished difference Result 278 states and 359 transitions. [2020-07-20 22:29:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-20 22:29:25,053 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 196 [2020-07-20 22:29:25,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:25,055 INFO L225 Difference]: With dead ends: 278 [2020-07-20 22:29:25,055 INFO L226 Difference]: Without dead ends: 206 [2020-07-20 22:29:25,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 363 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1034, Invalid=3256, Unknown=0, NotChecked=0, Total=4290 [2020-07-20 22:29:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-20 22:29:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 156. [2020-07-20 22:29:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-20 22:29:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 194 transitions. [2020-07-20 22:29:25,083 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 194 transitions. Word has length 196 [2020-07-20 22:29:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:25,083 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 194 transitions. [2020-07-20 22:29:25,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 22:29:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 194 transitions. [2020-07-20 22:29:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-07-20 22:29:25,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:25,087 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 7, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:25,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:25,300 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1782452330, now seen corresponding path program 11 times [2020-07-20 22:29:25,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:25,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102960820] [2020-07-20 22:29:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:25,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:25,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:25,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 22:29:25,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 1508 proven. 220 refuted. 0 times theorem prover too weak. 914 trivial. 0 not checked. [2020-07-20 22:29:25,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 735 proven. 399 refuted. 0 times theorem prover too weak. 1508 trivial. 0 not checked. [2020-07-20 22:29:25,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102960820] [2020-07-20 22:29:25,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:25,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2020-07-20 22:29:25,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221840782] [2020-07-20 22:29:25,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 22:29:25,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:25,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 22:29:25,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-07-20 22:29:25,842 INFO L87 Difference]: Start difference. First operand 156 states and 194 transitions. Second operand 23 states. [2020-07-20 22:29:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:26,867 INFO L93 Difference]: Finished difference Result 289 states and 381 transitions. [2020-07-20 22:29:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 22:29:26,868 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 230 [2020-07-20 22:29:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:26,870 INFO L225 Difference]: With dead ends: 289 [2020-07-20 22:29:26,870 INFO L226 Difference]: Without dead ends: 209 [2020-07-20 22:29:26,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 438 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=658, Invalid=1598, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 22:29:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-20 22:29:26,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 190. [2020-07-20 22:29:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-20 22:29:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 245 transitions. [2020-07-20 22:29:26,901 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 245 transitions. Word has length 230 [2020-07-20 22:29:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:26,902 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 245 transitions. [2020-07-20 22:29:26,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 22:29:26,902 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 245 transitions. [2020-07-20 22:29:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-07-20 22:29:26,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:26,905 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 7, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:27,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:27,119 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:27,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1051553665, now seen corresponding path program 12 times [2020-07-20 22:29:27,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:27,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047233646] [2020-07-20 22:29:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:27,193 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:27,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:27,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 22:29:27,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2834 backedges. 898 proven. 634 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2020-07-20 22:29:27,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2834 backedges. 467 proven. 635 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2020-07-20 22:29:27,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047233646] [2020-07-20 22:29:27,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:27,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2020-07-20 22:29:27,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366894597] [2020-07-20 22:29:27,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 22:29:27,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:27,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 22:29:27,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-07-20 22:29:27,638 INFO L87 Difference]: Start difference. First operand 190 states and 245 transitions. Second operand 21 states. [2020-07-20 22:29:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:29,138 INFO L93 Difference]: Finished difference Result 447 states and 593 transitions. [2020-07-20 22:29:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-20 22:29:29,138 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 237 [2020-07-20 22:29:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:29,141 INFO L225 Difference]: With dead ends: 447 [2020-07-20 22:29:29,141 INFO L226 Difference]: Without dead ends: 351 [2020-07-20 22:29:29,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 449 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=850, Invalid=2932, Unknown=0, NotChecked=0, Total=3782 [2020-07-20 22:29:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-07-20 22:29:29,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 254. [2020-07-20 22:29:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-07-20 22:29:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 328 transitions. [2020-07-20 22:29:29,186 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 328 transitions. Word has length 237 [2020-07-20 22:29:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:29,187 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 328 transitions. [2020-07-20 22:29:29,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 22:29:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 328 transitions. [2020-07-20 22:29:29,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-07-20 22:29:29,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:29,190 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 8, 7, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:29,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:29,401 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:29,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1090659833, now seen corresponding path program 13 times [2020-07-20 22:29:29,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:29,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099339436] [2020-07-20 22:29:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:29,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:29,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:29,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 22:29:29,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3506 backedges. 1861 proven. 224 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2020-07-20 22:29:29,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3506 backedges. 1123 proven. 224 refuted. 0 times theorem prover too weak. 2159 trivial. 0 not checked. [2020-07-20 22:29:29,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099339436] [2020-07-20 22:29:29,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:29,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2020-07-20 22:29:29,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217805656] [2020-07-20 22:29:29,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 22:29:29,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:29,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 22:29:29,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-07-20 22:29:29,882 INFO L87 Difference]: Start difference. First operand 254 states and 328 transitions. Second operand 18 states. [2020-07-20 22:29:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:30,555 INFO L93 Difference]: Finished difference Result 363 states and 475 transitions. [2020-07-20 22:29:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 22:29:30,556 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 261 [2020-07-20 22:29:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:30,558 INFO L225 Difference]: With dead ends: 363 [2020-07-20 22:29:30,558 INFO L226 Difference]: Without dead ends: 206 [2020-07-20 22:29:30,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 505 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 22:29:30,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-20 22:29:30,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-07-20 22:29:30,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 22:29:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 263 transitions. [2020-07-20 22:29:30,592 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 263 transitions. Word has length 261 [2020-07-20 22:29:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:30,593 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 263 transitions. [2020-07-20 22:29:30,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 22:29:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 263 transitions. [2020-07-20 22:29:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-07-20 22:29:30,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:30,595 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 8, 7, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:30,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:30,810 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:30,811 INFO L82 PathProgramCache]: Analyzing trace with hash -431748828, now seen corresponding path program 14 times [2020-07-20 22:29:30,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:30,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705428256] [2020-07-20 22:29:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:30,888 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:30,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:30,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 22:29:30,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 909 proven. 1045 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2020-07-20 22:29:31,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 484 proven. 1046 refuted. 0 times theorem prover too weak. 2197 trivial. 0 not checked. [2020-07-20 22:29:31,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705428256] [2020-07-20 22:29:31,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:31,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2020-07-20 22:29:31,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601094893] [2020-07-20 22:29:31,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 22:29:31,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:31,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 22:29:31,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2020-07-20 22:29:31,500 INFO L87 Difference]: Start difference. First operand 206 states and 263 transitions. Second operand 25 states. [2020-07-20 22:29:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:34,109 INFO L93 Difference]: Finished difference Result 364 states and 481 transitions. [2020-07-20 22:29:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-07-20 22:29:34,110 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 268 [2020-07-20 22:29:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:34,112 INFO L225 Difference]: With dead ends: 364 [2020-07-20 22:29:34,112 INFO L226 Difference]: Without dead ends: 258 [2020-07-20 22:29:34,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 507 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1434, Invalid=5046, Unknown=0, NotChecked=0, Total=6480 [2020-07-20 22:29:34,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-20 22:29:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 224. [2020-07-20 22:29:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-07-20 22:29:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 287 transitions. [2020-07-20 22:29:34,160 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 287 transitions. Word has length 268 [2020-07-20 22:29:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:34,161 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 287 transitions. [2020-07-20 22:29:34,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 22:29:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 287 transitions. [2020-07-20 22:29:34,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-20 22:29:34,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:34,164 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 35, 9, 8, 8, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:34,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:34,380 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:34,380 INFO L82 PathProgramCache]: Analyzing trace with hash -935543841, now seen corresponding path program 15 times [2020-07-20 22:29:34,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:34,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502630370] [2020-07-20 22:29:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:34,451 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:34,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:34,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 22:29:34,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 2489 proven. 351 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2020-07-20 22:29:34,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 1293 proven. 629 refuted. 0 times theorem prover too weak. 2821 trivial. 0 not checked. [2020-07-20 22:29:34,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502630370] [2020-07-20 22:29:34,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:34,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-07-20 22:29:34,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035389560] [2020-07-20 22:29:34,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 22:29:34,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:34,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 22:29:34,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-07-20 22:29:34,991 INFO L87 Difference]: Start difference. First operand 224 states and 287 transitions. Second operand 22 states. [2020-07-20 22:29:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:36,197 INFO L93 Difference]: Finished difference Result 320 states and 417 transitions. [2020-07-20 22:29:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 22:29:36,198 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 299 [2020-07-20 22:29:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:36,201 INFO L225 Difference]: With dead ends: 320 [2020-07-20 22:29:36,201 INFO L226 Difference]: Without dead ends: 224 [2020-07-20 22:29:36,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 577 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=837, Invalid=2025, Unknown=0, NotChecked=0, Total=2862 [2020-07-20 22:29:36,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-20 22:29:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 193. [2020-07-20 22:29:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-20 22:29:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 238 transitions. [2020-07-20 22:29:36,236 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 238 transitions. Word has length 299 [2020-07-20 22:29:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:36,237 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 238 transitions. [2020-07-20 22:29:36,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 22:29:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 238 transitions. [2020-07-20 22:29:36,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-07-20 22:29:36,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:36,239 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 9, 8, 8, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:36,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:36,453 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:36,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:36,454 INFO L82 PathProgramCache]: Analyzing trace with hash 221652094, now seen corresponding path program 16 times [2020-07-20 22:29:36,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:36,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284332734] [2020-07-20 22:29:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:36,595 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:36,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:36,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 22:29:36,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 875 proven. 1633 refuted. 0 times theorem prover too weak. 2492 trivial. 0 not checked. [2020-07-20 22:29:36,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 484 proven. 1634 refuted. 0 times theorem prover too weak. 2882 trivial. 0 not checked. [2020-07-20 22:29:37,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284332734] [2020-07-20 22:29:37,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:37,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2020-07-20 22:29:37,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899985031] [2020-07-20 22:29:37,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 22:29:37,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:37,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 22:29:37,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2020-07-20 22:29:37,427 INFO L87 Difference]: Start difference. First operand 193 states and 238 transitions. Second operand 29 states. [2020-07-20 22:29:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:41,069 INFO L93 Difference]: Finished difference Result 343 states and 444 transitions. [2020-07-20 22:29:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-07-20 22:29:41,070 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 306 [2020-07-20 22:29:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:41,073 INFO L225 Difference]: With dead ends: 343 [2020-07-20 22:29:41,073 INFO L226 Difference]: Without dead ends: 265 [2020-07-20 22:29:41,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 579 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1903, Invalid=6653, Unknown=0, NotChecked=0, Total=8556 [2020-07-20 22:29:41,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-20 22:29:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2020-07-20 22:29:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-20 22:29:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 266 transitions. [2020-07-20 22:29:41,113 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 266 transitions. Word has length 306 [2020-07-20 22:29:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:41,113 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 266 transitions. [2020-07-20 22:29:41,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 22:29:41,114 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 266 transitions. [2020-07-20 22:29:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-20 22:29:41,116 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:41,116 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 41, 10, 9, 9, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:41,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:41,331 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:41,332 INFO L82 PathProgramCache]: Analyzing trace with hash 856878168, now seen corresponding path program 17 times [2020-07-20 22:29:41,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:41,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963443141] [2020-07-20 22:29:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:41,413 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:41,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:41,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 22:29:41,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6461 backedges. 3316 proven. 523 refuted. 0 times theorem prover too weak. 2622 trivial. 0 not checked. [2020-07-20 22:29:41,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6461 backedges. 1566 proven. 1139 refuted. 0 times theorem prover too weak. 3756 trivial. 0 not checked. [2020-07-20 22:29:42,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963443141] [2020-07-20 22:29:42,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:42,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2020-07-20 22:29:42,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007121755] [2020-07-20 22:29:42,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 22:29:42,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:42,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 22:29:42,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-07-20 22:29:42,326 INFO L87 Difference]: Start difference. First operand 214 states and 266 transitions. Second operand 26 states. [2020-07-20 22:29:44,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:44,476 INFO L93 Difference]: Finished difference Result 416 states and 539 transitions. [2020-07-20 22:29:44,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-20 22:29:44,477 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 344 [2020-07-20 22:29:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:44,479 INFO L225 Difference]: With dead ends: 416 [2020-07-20 22:29:44,480 INFO L226 Difference]: Without dead ends: 262 [2020-07-20 22:29:44,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 663 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1502, Invalid=3610, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 22:29:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-20 22:29:44,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2020-07-20 22:29:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-07-20 22:29:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 315 transitions. [2020-07-20 22:29:44,525 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 315 transitions. Word has length 344 [2020-07-20 22:29:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:44,526 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 315 transitions. [2020-07-20 22:29:44,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 22:29:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 315 transitions. [2020-07-20 22:29:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 22:29:44,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:44,529 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 42, 10, 9, 9, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:44,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:44,743 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:44,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:44,743 INFO L82 PathProgramCache]: Analyzing trace with hash 930621925, now seen corresponding path program 18 times [2020-07-20 22:29:44,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:44,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318673382] [2020-07-20 22:29:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:44,843 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:44,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:44,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 22:29:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6761 backedges. 775 proven. 2452 refuted. 0 times theorem prover too weak. 3534 trivial. 0 not checked. [2020-07-20 22:29:45,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6761 backedges. 458 proven. 2453 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2020-07-20 22:29:46,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318673382] [2020-07-20 22:29:46,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:46,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2020-07-20 22:29:46,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792852618] [2020-07-20 22:29:46,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 22:29:46,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:46,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 22:29:46,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 22:29:46,033 INFO L87 Difference]: Start difference. First operand 248 states and 315 transitions. Second operand 33 states. [2020-07-20 22:29:50,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:50,337 INFO L93 Difference]: Finished difference Result 453 states and 590 transitions. [2020-07-20 22:29:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-07-20 22:29:50,337 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 351 [2020-07-20 22:29:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:50,339 INFO L225 Difference]: With dead ends: 453 [2020-07-20 22:29:50,340 INFO L226 Difference]: Without dead ends: 331 [2020-07-20 22:29:50,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 665 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3651 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2557, Invalid=8785, Unknown=0, NotChecked=0, Total=11342 [2020-07-20 22:29:50,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-07-20 22:29:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 274. [2020-07-20 22:29:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-20 22:29:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 351 transitions. [2020-07-20 22:29:50,394 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 351 transitions. Word has length 351 [2020-07-20 22:29:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:50,395 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 351 transitions. [2020-07-20 22:29:50,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 22:29:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 351 transitions. [2020-07-20 22:29:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2020-07-20 22:29:50,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:50,398 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 48, 48, 11, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:50,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:50,612 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:50,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1703194347, now seen corresponding path program 19 times [2020-07-20 22:29:50,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:50,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446479440] [2020-07-20 22:29:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:50,709 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:50,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:50,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 22:29:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8813 backedges. 4410 proven. 749 refuted. 0 times theorem prover too weak. 3654 trivial. 0 not checked. [2020-07-20 22:29:51,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8813 backedges. 2010 proven. 1763 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2020-07-20 22:29:51,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446479440] [2020-07-20 22:29:51,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:51,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2020-07-20 22:29:51,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477775650] [2020-07-20 22:29:51,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 22:29:51,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:51,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 22:29:51,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2020-07-20 22:29:51,672 INFO L87 Difference]: Start difference. First operand 274 states and 351 transitions. Second operand 30 states. [2020-07-20 22:29:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:53,826 INFO L93 Difference]: Finished difference Result 444 states and 588 transitions. [2020-07-20 22:29:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-07-20 22:29:53,828 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 399 [2020-07-20 22:29:53,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:53,831 INFO L225 Difference]: With dead ends: 444 [2020-07-20 22:29:53,831 INFO L226 Difference]: Without dead ends: 321 [2020-07-20 22:29:53,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 769 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1660, Invalid=4192, Unknown=0, NotChecked=0, Total=5852 [2020-07-20 22:29:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-07-20 22:29:53,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 308. [2020-07-20 22:29:53,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-07-20 22:29:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 400 transitions. [2020-07-20 22:29:53,873 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 400 transitions. Word has length 399 [2020-07-20 22:29:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:53,874 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 400 transitions. [2020-07-20 22:29:53,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 22:29:53,874 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 400 transitions. [2020-07-20 22:29:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-20 22:29:53,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:53,876 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 49, 49, 11, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:54,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:54,077 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1852909686, now seen corresponding path program 20 times [2020-07-20 22:29:54,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:54,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54762639] [2020-07-20 22:29:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:54,185 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:29:54,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:54,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 22:29:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9163 backedges. 1480 proven. 2573 refuted. 0 times theorem prover too weak. 5110 trivial. 0 not checked. [2020-07-20 22:29:54,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9163 backedges. 767 proven. 2574 refuted. 0 times theorem prover too weak. 5822 trivial. 0 not checked. [2020-07-20 22:29:54,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54762639] [2020-07-20 22:29:54,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:54,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2020-07-20 22:29:54,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936699631] [2020-07-20 22:29:54,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 22:29:54,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:54,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 22:29:54,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2020-07-20 22:29:54,932 INFO L87 Difference]: Start difference. First operand 308 states and 400 transitions. Second operand 24 states. [2020-07-20 22:29:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:57,251 INFO L93 Difference]: Finished difference Result 708 states and 943 transitions. [2020-07-20 22:29:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-07-20 22:29:57,251 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 406 [2020-07-20 22:29:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:57,254 INFO L225 Difference]: With dead ends: 708 [2020-07-20 22:29:57,254 INFO L226 Difference]: Without dead ends: 575 [2020-07-20 22:29:57,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 783 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1394, Invalid=5086, Unknown=0, NotChecked=0, Total=6480 [2020-07-20 22:29:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2020-07-20 22:29:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 408. [2020-07-20 22:29:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-07-20 22:29:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 530 transitions. [2020-07-20 22:29:57,340 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 530 transitions. Word has length 406 [2020-07-20 22:29:57,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:57,341 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 530 transitions. [2020-07-20 22:29:57,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 22:29:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 530 transitions. [2020-07-20 22:29:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-07-20 22:29:57,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:57,345 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 53, 53, 53, 53, 12, 11, 11, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:57,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:57,561 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1246863545, now seen corresponding path program 21 times [2020-07-20 22:29:57,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:57,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007261284] [2020-07-20 22:29:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:57,674 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:29:57,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:29:57,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 22:29:57,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:29:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10723 backedges. 4950 proven. 605 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2020-07-20 22:29:57,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:29:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10723 backedges. 3384 proven. 605 refuted. 0 times theorem prover too weak. 6734 trivial. 0 not checked. [2020-07-20 22:29:58,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007261284] [2020-07-20 22:29:58,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:29:58,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2020-07-20 22:29:58,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034001319] [2020-07-20 22:29:58,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 22:29:58,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:29:58,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 22:29:58,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-07-20 22:29:58,477 INFO L87 Difference]: Start difference. First operand 408 states and 530 transitions. Second operand 21 states. [2020-07-20 22:29:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:29:59,669 INFO L93 Difference]: Finished difference Result 557 states and 733 transitions. [2020-07-20 22:29:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 22:29:59,670 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 437 [2020-07-20 22:29:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:29:59,672 INFO L225 Difference]: With dead ends: 557 [2020-07-20 22:29:59,672 INFO L226 Difference]: Without dead ends: 327 [2020-07-20 22:29:59,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 854 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=675, Invalid=1581, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 22:29:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-07-20 22:29:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2020-07-20 22:29:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-07-20 22:29:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 422 transitions. [2020-07-20 22:29:59,736 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 422 transitions. Word has length 437 [2020-07-20 22:29:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:29:59,737 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 422 transitions. [2020-07-20 22:29:59,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 22:29:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 422 transitions. [2020-07-20 22:29:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2020-07-20 22:29:59,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:29:59,740 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 54, 54, 54, 54, 12, 11, 11, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:29:59,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:29:59,955 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:29:59,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:29:59,956 INFO L82 PathProgramCache]: Analyzing trace with hash -833030556, now seen corresponding path program 22 times [2020-07-20 22:29:59,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:29:59,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298350827] [2020-07-20 22:29:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:00,075 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:00,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:00,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 22:30:00,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11109 backedges. 1317 proven. 3531 refuted. 0 times theorem prover too weak. 6261 trivial. 0 not checked. [2020-07-20 22:30:00,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11109 backedges. 710 proven. 3532 refuted. 0 times theorem prover too weak. 6867 trivial. 0 not checked. [2020-07-20 22:30:00,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298350827] [2020-07-20 22:30:00,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:00,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2020-07-20 22:30:00,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663336576] [2020-07-20 22:30:00,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 22:30:00,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:00,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 22:30:00,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2020-07-20 22:30:00,982 INFO L87 Difference]: Start difference. First operand 327 states and 422 transitions. Second operand 28 states. [2020-07-20 22:30:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:05,345 INFO L93 Difference]: Finished difference Result 545 states and 722 transitions. [2020-07-20 22:30:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-07-20 22:30:05,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 444 [2020-07-20 22:30:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:05,350 INFO L225 Difference]: With dead ends: 545 [2020-07-20 22:30:05,350 INFO L226 Difference]: Without dead ends: 402 [2020-07-20 22:30:05,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 855 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4405 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2533, Invalid=9677, Unknown=0, NotChecked=0, Total=12210 [2020-07-20 22:30:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-07-20 22:30:05,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 348. [2020-07-20 22:30:05,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-07-20 22:30:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 450 transitions. [2020-07-20 22:30:05,419 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 450 transitions. Word has length 444 [2020-07-20 22:30:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:05,420 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 450 transitions. [2020-07-20 22:30:05,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 22:30:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 450 transitions. [2020-07-20 22:30:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 22:30:05,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:05,424 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 59, 59, 59, 59, 13, 12, 12, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:05,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:05,638 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:05,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:05,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1802445246, now seen corresponding path program 23 times [2020-07-20 22:30:05,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:05,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495475786] [2020-07-20 22:30:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:05,736 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:30:05,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:05,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 22:30:05,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13243 backedges. 6090 proven. 834 refuted. 0 times theorem prover too weak. 6319 trivial. 0 not checked. [2020-07-20 22:30:06,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13243 backedges. 3585 proven. 1557 refuted. 0 times theorem prover too weak. 8101 trivial. 0 not checked. [2020-07-20 22:30:06,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495475786] [2020-07-20 22:30:06,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:06,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2020-07-20 22:30:06,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563236642] [2020-07-20 22:30:06,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 22:30:06,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 22:30:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-07-20 22:30:06,637 INFO L87 Difference]: Start difference. First operand 348 states and 450 transitions. Second operand 25 states. [2020-07-20 22:30:08,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:08,439 INFO L93 Difference]: Finished difference Result 481 states and 632 transitions. [2020-07-20 22:30:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-20 22:30:08,440 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 482 [2020-07-20 22:30:08,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:08,441 INFO L225 Difference]: With dead ends: 481 [2020-07-20 22:30:08,442 INFO L226 Difference]: Without dead ends: 348 [2020-07-20 22:30:08,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 940 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1270, Invalid=3152, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 22:30:08,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-07-20 22:30:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2020-07-20 22:30:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-07-20 22:30:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 448 transitions. [2020-07-20 22:30:08,515 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 448 transitions. Word has length 482 [2020-07-20 22:30:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:08,516 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 448 transitions. [2020-07-20 22:30:08,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 22:30:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 448 transitions. [2020-07-20 22:30:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 22:30:08,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:08,520 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 60, 60, 60, 60, 13, 12, 12, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:08,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:08,736 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:08,736 INFO L82 PathProgramCache]: Analyzing trace with hash 564016575, now seen corresponding path program 24 times [2020-07-20 22:30:08,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:08,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619787385] [2020-07-20 22:30:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:08,922 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:08,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 22:30:08,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13672 backedges. 1088 proven. 4777 refuted. 0 times theorem prover too weak. 7807 trivial. 0 not checked. [2020-07-20 22:30:09,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13672 backedges. 627 proven. 4778 refuted. 0 times theorem prover too weak. 8267 trivial. 0 not checked. [2020-07-20 22:30:10,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619787385] [2020-07-20 22:30:10,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:10,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2020-07-20 22:30:10,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082279907] [2020-07-20 22:30:10,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 22:30:10,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:10,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 22:30:10,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2020-07-20 22:30:10,164 INFO L87 Difference]: Start difference. First operand 348 states and 448 transitions. Second operand 32 states. [2020-07-20 22:30:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:16,237 INFO L93 Difference]: Finished difference Result 552 states and 727 transitions. [2020-07-20 22:30:16,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-07-20 22:30:16,237 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 489 [2020-07-20 22:30:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:16,240 INFO L225 Difference]: With dead ends: 552 [2020-07-20 22:30:16,240 INFO L226 Difference]: Without dead ends: 406 [2020-07-20 22:30:16,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 941 SyntacticMatches, 6 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6262 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3560, Invalid=13470, Unknown=0, NotChecked=0, Total=17030 [2020-07-20 22:30:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-07-20 22:30:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 372. [2020-07-20 22:30:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-07-20 22:30:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 480 transitions. [2020-07-20 22:30:16,319 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 480 transitions. Word has length 489 [2020-07-20 22:30:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:16,320 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 480 transitions. [2020-07-20 22:30:16,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 22:30:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 480 transitions. [2020-07-20 22:30:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-07-20 22:30:16,325 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:16,325 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 66, 66, 66, 66, 14, 13, 13, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:16,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:16,541 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:16,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:16,542 INFO L82 PathProgramCache]: Analyzing trace with hash 869445188, now seen corresponding path program 25 times [2020-07-20 22:30:16,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:16,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409309631] [2020-07-20 22:30:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:16,654 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:30:16,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:16,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 22:30:16,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16502 backedges. 7531 proven. 1117 refuted. 0 times theorem prover too weak. 7854 trivial. 0 not checked. [2020-07-20 22:30:17,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16502 backedges. 3921 proven. 2693 refuted. 0 times theorem prover too weak. 9888 trivial. 0 not checked. [2020-07-20 22:30:17,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409309631] [2020-07-20 22:30:17,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:17,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2020-07-20 22:30:17,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502078910] [2020-07-20 22:30:17,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 22:30:17,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:17,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 22:30:17,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-07-20 22:30:17,841 INFO L87 Difference]: Start difference. First operand 372 states and 480 transitions. Second operand 29 states. [2020-07-20 22:30:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:20,711 INFO L93 Difference]: Finished difference Result 505 states and 661 transitions. [2020-07-20 22:30:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-20 22:30:20,712 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 534 [2020-07-20 22:30:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:20,715 INFO L225 Difference]: With dead ends: 505 [2020-07-20 22:30:20,715 INFO L226 Difference]: Without dead ends: 372 [2020-07-20 22:30:20,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1130 GetRequests, 1040 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2104, Invalid=5378, Unknown=0, NotChecked=0, Total=7482 [2020-07-20 22:30:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-07-20 22:30:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 341. [2020-07-20 22:30:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-07-20 22:30:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 433 transitions. [2020-07-20 22:30:20,790 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 433 transitions. Word has length 534 [2020-07-20 22:30:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:20,790 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 433 transitions. [2020-07-20 22:30:20,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 22:30:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 433 transitions. [2020-07-20 22:30:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2020-07-20 22:30:20,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:20,796 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 67, 67, 67, 67, 14, 13, 13, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:21,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:21,009 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:21,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:21,010 INFO L82 PathProgramCache]: Analyzing trace with hash 943892089, now seen corresponding path program 26 times [2020-07-20 22:30:21,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:21,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228185933] [2020-07-20 22:30:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:21,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:21,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:21,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 22:30:21,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16981 backedges. 772 proven. 6374 refuted. 0 times theorem prover too weak. 9835 trivial. 0 not checked. [2020-07-20 22:30:21,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16981 backedges. 509 proven. 6375 refuted. 0 times theorem prover too weak. 10097 trivial. 0 not checked. [2020-07-20 22:30:22,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228185933] [2020-07-20 22:30:22,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:22,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2020-07-20 22:30:22,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265558036] [2020-07-20 22:30:22,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 22:30:22,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:22,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 22:30:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 22:30:22,685 INFO L87 Difference]: Start difference. First operand 341 states and 433 transitions. Second operand 36 states. [2020-07-20 22:30:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:30,218 INFO L93 Difference]: Finished difference Result 520 states and 674 transitions. [2020-07-20 22:30:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-07-20 22:30:30,219 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 541 [2020-07-20 22:30:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:30,221 INFO L225 Difference]: With dead ends: 520 [2020-07-20 22:30:30,221 INFO L226 Difference]: Without dead ends: 402 [2020-07-20 22:30:30,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 1041 SyntacticMatches, 6 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7485 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4201, Invalid=16391, Unknown=0, NotChecked=0, Total=20592 [2020-07-20 22:30:30,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-07-20 22:30:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 368. [2020-07-20 22:30:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-07-20 22:30:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 469 transitions. [2020-07-20 22:30:30,303 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 469 transitions. Word has length 541 [2020-07-20 22:30:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:30,304 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 469 transitions. [2020-07-20 22:30:30,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 22:30:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 469 transitions. [2020-07-20 22:30:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2020-07-20 22:30:30,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:30,309 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 74, 74, 74, 74, 15, 14, 14, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:30,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:30,524 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1328811571, now seen corresponding path program 27 times [2020-07-20 22:30:30,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:30,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246026727] [2020-07-20 22:30:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:30,648 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:30:30,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:30,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 22:30:30,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20650 backedges. 9327 proven. 1463 refuted. 0 times theorem prover too weak. 9860 trivial. 0 not checked. [2020-07-20 22:30:31,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20650 backedges. 4446 proven. 4022 refuted. 0 times theorem prover too weak. 12182 trivial. 0 not checked. [2020-07-20 22:30:32,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246026727] [2020-07-20 22:30:32,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:32,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2020-07-20 22:30:32,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190255410] [2020-07-20 22:30:32,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 22:30:32,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:32,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 22:30:32,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 22:30:32,290 INFO L87 Difference]: Start difference. First operand 368 states and 469 transitions. Second operand 33 states. [2020-07-20 22:30:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:36,293 INFO L93 Difference]: Finished difference Result 649 states and 846 transitions. [2020-07-20 22:30:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-07-20 22:30:36,294 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 593 [2020-07-20 22:30:36,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:36,297 INFO L225 Difference]: With dead ends: 649 [2020-07-20 22:30:36,297 INFO L226 Difference]: Without dead ends: 410 [2020-07-20 22:30:36,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1265 GetRequests, 1154 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3271, Invalid=8285, Unknown=0, NotChecked=0, Total=11556 [2020-07-20 22:30:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-07-20 22:30:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 402. [2020-07-20 22:30:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-07-20 22:30:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 516 transitions. [2020-07-20 22:30:36,382 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 516 transitions. Word has length 593 [2020-07-20 22:30:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:36,382 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 516 transitions. [2020-07-20 22:30:36,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 22:30:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 516 transitions. [2020-07-20 22:30:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2020-07-20 22:30:36,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:36,388 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 75, 75, 75, 75, 15, 14, 14, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:36,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:36,603 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:36,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1218530218, now seen corresponding path program 28 times [2020-07-20 22:30:36,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:36,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911044518] [2020-07-20 22:30:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:36,755 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:36,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:36,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 22:30:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21186 backedges. 348 proven. 8394 refuted. 0 times theorem prover too weak. 12444 trivial. 0 not checked. [2020-07-20 22:30:37,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21186 backedges. 347 proven. 8395 refuted. 0 times theorem prover too weak. 12444 trivial. 0 not checked. [2020-07-20 22:30:38,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911044518] [2020-07-20 22:30:38,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:38,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 40 [2020-07-20 22:30:38,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466124018] [2020-07-20 22:30:38,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 22:30:38,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:38,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 22:30:38,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 22:30:38,519 INFO L87 Difference]: Start difference. First operand 402 states and 516 transitions. Second operand 40 states. [2020-07-20 22:30:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:47,314 INFO L93 Difference]: Finished difference Result 702 states and 919 transitions. [2020-07-20 22:30:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-07-20 22:30:47,316 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 600 [2020-07-20 22:30:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:47,319 INFO L225 Difference]: With dead ends: 702 [2020-07-20 22:30:47,319 INFO L226 Difference]: Without dead ends: 527 [2020-07-20 22:30:47,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1322 GetRequests, 1155 SyntacticMatches, 6 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9714 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5642, Invalid=20764, Unknown=0, NotChecked=0, Total=26406 [2020-07-20 22:30:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-07-20 22:30:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 434. [2020-07-20 22:30:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-07-20 22:30:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 560 transitions. [2020-07-20 22:30:47,416 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 560 transitions. Word has length 600 [2020-07-20 22:30:47,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:47,417 INFO L479 AbstractCegarLoop]: Abstraction has 434 states and 560 transitions. [2020-07-20 22:30:47,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 22:30:47,417 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 560 transitions. [2020-07-20 22:30:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2020-07-20 22:30:47,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:47,423 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 84, 83, 83, 83, 83, 16, 15, 15, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:47,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:47,637 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:47,637 INFO L82 PathProgramCache]: Analyzing trace with hash -955730672, now seen corresponding path program 29 times [2020-07-20 22:30:47,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:47,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684697403] [2020-07-20 22:30:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:47,776 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:30:47,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:47,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 22:30:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25890 backedges. 11572 proven. 1881 refuted. 0 times theorem prover too weak. 12437 trivial. 0 not checked. [2020-07-20 22:30:48,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25890 backedges. 5254 proven. 5553 refuted. 0 times theorem prover too weak. 15083 trivial. 0 not checked. [2020-07-20 22:30:49,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684697403] [2020-07-20 22:30:49,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:49,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 37 [2020-07-20 22:30:49,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502530161] [2020-07-20 22:30:49,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 22:30:49,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:49,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 22:30:49,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 22:30:49,739 INFO L87 Difference]: Start difference. First operand 434 states and 560 transitions. Second operand 37 states. [2020-07-20 22:30:54,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:54,546 INFO L93 Difference]: Finished difference Result 642 states and 845 transitions. [2020-07-20 22:30:54,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-07-20 22:30:54,547 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 662 [2020-07-20 22:30:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:54,551 INFO L225 Difference]: With dead ends: 642 [2020-07-20 22:30:54,552 INFO L226 Difference]: Without dead ends: 476 [2020-07-20 22:30:54,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1404 GetRequests, 1288 SyntacticMatches, 5 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3542, Invalid=9114, Unknown=0, NotChecked=0, Total=12656 [2020-07-20 22:30:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-07-20 22:30:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 468. [2020-07-20 22:30:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-07-20 22:30:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 607 transitions. [2020-07-20 22:30:54,642 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 607 transitions. Word has length 662 [2020-07-20 22:30:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:54,643 INFO L479 AbstractCegarLoop]: Abstraction has 468 states and 607 transitions. [2020-07-20 22:30:54,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 22:30:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 607 transitions. [2020-07-20 22:30:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2020-07-20 22:30:54,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:54,649 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 85, 84, 84, 84, 84, 16, 15, 15, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:54,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:54,864 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2116259269, now seen corresponding path program 30 times [2020-07-20 22:30:54,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:54,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930655166] [2020-07-20 22:30:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:55,033 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:55,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:55,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 22:30:55,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 26490 backedges. 2050 proven. 8359 refuted. 0 times theorem prover too weak. 16081 trivial. 0 not checked. [2020-07-20 22:30:55,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 26490 backedges. 1083 proven. 8360 refuted. 0 times theorem prover too weak. 17047 trivial. 0 not checked. [2020-07-20 22:30:56,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930655166] [2020-07-20 22:30:56,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:56,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2020-07-20 22:30:56,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201329224] [2020-07-20 22:30:56,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 22:30:56,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:56,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 22:30:56,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2020-07-20 22:30:56,508 INFO L87 Difference]: Start difference. First operand 468 states and 607 transitions. Second operand 27 states. [2020-07-20 22:31:00,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:31:00,522 INFO L93 Difference]: Finished difference Result 1029 states and 1363 transitions. [2020-07-20 22:31:00,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-07-20 22:31:00,523 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 669 [2020-07-20 22:31:00,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:31:00,527 INFO L225 Difference]: With dead ends: 1029 [2020-07-20 22:31:00,527 INFO L226 Difference]: Without dead ends: 859 [2020-07-20 22:31:00,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1414 GetRequests, 1305 SyntacticMatches, 7 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3938 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2225, Invalid=8487, Unknown=0, NotChecked=0, Total=10712 [2020-07-20 22:31:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-07-20 22:31:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 613. [2020-07-20 22:31:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-07-20 22:31:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 796 transitions. [2020-07-20 22:31:00,647 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 796 transitions. Word has length 669 [2020-07-20 22:31:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:31:00,648 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 796 transitions. [2020-07-20 22:31:00,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 22:31:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 796 transitions. [2020-07-20 22:31:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2020-07-20 22:31:00,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:31:00,653 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 90, 89, 89, 89, 89, 17, 16, 16, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:31:00,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:00,853 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:31:00,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:31:00,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1360123809, now seen corresponding path program 31 times [2020-07-20 22:31:00,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:31:00,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450819867] [2020-07-20 22:31:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:00,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:31:00,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:31:01,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 22:31:01,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:31:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29737 backedges. 12374 proven. 1344 refuted. 0 times theorem prover too weak. 16019 trivial. 0 not checked. [2020-07-20 22:31:01,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:31:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 29737 backedges. 9512 proven. 1344 refuted. 0 times theorem prover too weak. 18881 trivial. 0 not checked. [2020-07-20 22:31:02,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450819867] [2020-07-20 22:31:02,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:31:02,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2020-07-20 22:31:02,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925904668] [2020-07-20 22:31:02,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 22:31:02,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:31:02,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 22:31:02,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2020-07-20 22:31:02,428 INFO L87 Difference]: Start difference. First operand 613 states and 796 transitions. Second operand 24 states. [2020-07-20 22:31:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:31:04,274 INFO L93 Difference]: Finished difference Result 802 states and 1052 transitions. [2020-07-20 22:31:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-20 22:31:04,276 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 707 [2020-07-20 22:31:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:31:04,280 INFO L225 Difference]: With dead ends: 802 [2020-07-20 22:31:04,280 INFO L226 Difference]: Without dead ends: 490 [2020-07-20 22:31:04,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1455 GetRequests, 1391 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1039, Invalid=2501, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 22:31:04,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-20 22:31:04,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-20 22:31:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-20 22:31:04,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 633 transitions. [2020-07-20 22:31:04,380 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 633 transitions. Word has length 707 [2020-07-20 22:31:04,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:31:04,380 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 633 transitions. [2020-07-20 22:31:04,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 22:31:04,380 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 633 transitions. [2020-07-20 22:31:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2020-07-20 22:31:04,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:31:04,385 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 91, 90, 90, 90, 90, 17, 16, 16, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:31:04,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:04,586 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:31:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:31:04,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1558816766, now seen corresponding path program 32 times [2020-07-20 22:31:04,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:31:04,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107278215] [2020-07-20 22:31:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:04,760 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:31:04,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:31:04,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 22:31:04,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:31:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30380 backedges. 1607 proven. 10306 refuted. 0 times theorem prover too weak. 18467 trivial. 0 not checked. [2020-07-20 22:31:05,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:31:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30380 backedges. 906 proven. 10307 refuted. 0 times theorem prover too weak. 19167 trivial. 0 not checked. [2020-07-20 22:31:06,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107278215] [2020-07-20 22:31:06,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:31:06,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2020-07-20 22:31:06,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049141860] [2020-07-20 22:31:06,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 22:31:06,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:31:06,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 22:31:06,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2020-07-20 22:31:06,571 INFO L87 Difference]: Start difference. First operand 490 states and 633 transitions. Second operand 31 states. [2020-07-20 22:31:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:31:14,616 INFO L93 Difference]: Finished difference Result 785 states and 1037 transitions. [2020-07-20 22:31:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-07-20 22:31:14,617 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 714 [2020-07-20 22:31:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:31:14,620 INFO L225 Difference]: With dead ends: 785 [2020-07-20 22:31:14,620 INFO L226 Difference]: Without dead ends: 605 [2020-07-20 22:31:14,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1546 GetRequests, 1391 SyntacticMatches, 7 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8958 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4408, Invalid=17942, Unknown=0, NotChecked=0, Total=22350 [2020-07-20 22:31:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-07-20 22:31:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 514. [2020-07-20 22:31:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-07-20 22:31:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 665 transitions. [2020-07-20 22:31:14,731 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 665 transitions. Word has length 714 [2020-07-20 22:31:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:31:14,732 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 665 transitions. [2020-07-20 22:31:14,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 22:31:14,732 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 665 transitions. [2020-07-20 22:31:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2020-07-20 22:31:14,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:31:14,738 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 97, 96, 96, 96, 96, 18, 17, 17, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:31:14,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:14,939 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:31:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:31:14,940 INFO L82 PathProgramCache]: Analyzing trace with hash 937711205, now seen corresponding path program 33 times [2020-07-20 22:31:14,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:31:14,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939475284] [2020-07-20 22:31:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:15,094 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:31:15,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:31:15,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 22:31:15,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:31:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34537 backedges. 14422 proven. 1721 refuted. 0 times theorem prover too weak. 18394 trivial. 0 not checked. [2020-07-20 22:31:15,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:31:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 34537 backedges. 9744 proven. 3285 refuted. 0 times theorem prover too weak. 21508 trivial. 0 not checked. [2020-07-20 22:31:16,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939475284] [2020-07-20 22:31:16,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:31:16,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2020-07-20 22:31:16,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316583990] [2020-07-20 22:31:16,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 22:31:16,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:31:16,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 22:31:16,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-07-20 22:31:16,871 INFO L87 Difference]: Start difference. First operand 514 states and 665 transitions. Second operand 28 states. [2020-07-20 22:31:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:31:19,790 INFO L93 Difference]: Finished difference Result 684 states and 896 transitions. [2020-07-20 22:31:19,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-20 22:31:19,791 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 759 [2020-07-20 22:31:19,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:31:19,794 INFO L225 Difference]: With dead ends: 684 [2020-07-20 22:31:19,794 INFO L226 Difference]: Without dead ends: 514 [2020-07-20 22:31:19,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1576 GetRequests, 1491 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1853, Invalid=4627, Unknown=0, NotChecked=0, Total=6480 [2020-07-20 22:31:19,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-07-20 22:31:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2020-07-20 22:31:19,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-07-20 22:31:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 663 transitions. [2020-07-20 22:31:19,951 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 663 transitions. Word has length 759 [2020-07-20 22:31:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:31:19,953 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 663 transitions. [2020-07-20 22:31:19,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 22:31:19,953 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 663 transitions. [2020-07-20 22:31:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2020-07-20 22:31:19,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:31:19,967 INFO L422 BasicCegarLoop]: trace histogram [98, 98, 98, 97, 97, 97, 97, 18, 17, 17, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:31:20,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:20,180 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:31:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:31:20,182 INFO L82 PathProgramCache]: Analyzing trace with hash -661993672, now seen corresponding path program 34 times [2020-07-20 22:31:20,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:31:20,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027047173] [2020-07-20 22:31:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:20,413 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:31:20,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:31:20,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 22:31:20,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:31:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 35230 backedges. 1077 proven. 12698 refuted. 0 times theorem prover too weak. 21455 trivial. 0 not checked. [2020-07-20 22:31:21,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:31:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 35230 backedges. 694 proven. 12699 refuted. 0 times theorem prover too weak. 21837 trivial. 0 not checked. [2020-07-20 22:31:22,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027047173] [2020-07-20 22:31:22,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:31:22,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2020-07-20 22:31:22,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004709512] [2020-07-20 22:31:22,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 22:31:22,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:31:22,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 22:31:22,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=966, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 22:31:22,609 INFO L87 Difference]: Start difference. First operand 514 states and 663 transitions. Second operand 35 states. [2020-07-20 22:31:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:31:33,536 INFO L93 Difference]: Finished difference Result 784 states and 1029 transitions. [2020-07-20 22:31:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-07-20 22:31:33,538 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 766 [2020-07-20 22:31:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:31:33,542 INFO L225 Difference]: With dead ends: 784 [2020-07-20 22:31:33,542 INFO L226 Difference]: Without dead ends: 601 [2020-07-20 22:31:33,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1671 GetRequests, 1491 SyntacticMatches, 7 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12320 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=5987, Invalid=24463, Unknown=0, NotChecked=0, Total=30450 [2020-07-20 22:31:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-07-20 22:31:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 541. [2020-07-20 22:31:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-07-20 22:31:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 699 transitions. [2020-07-20 22:31:33,641 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 699 transitions. Word has length 766 [2020-07-20 22:31:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:31:33,642 INFO L479 AbstractCegarLoop]: Abstraction has 541 states and 699 transitions. [2020-07-20 22:31:33,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 22:31:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 699 transitions. [2020-07-20 22:31:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2020-07-20 22:31:33,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:31:33,647 INFO L422 BasicCegarLoop]: trace histogram [105, 105, 105, 104, 104, 104, 104, 19, 18, 18, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:31:33,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:33,854 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:31:33,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:31:33,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1871274638, now seen corresponding path program 35 times [2020-07-20 22:31:33,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:31:33,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108423077] [2020-07-20 22:31:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:34,020 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:31:34,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:31:34,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 22:31:34,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:31:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 40440 backedges. 16919 proven. 2161 refuted. 0 times theorem prover too weak. 21360 trivial. 0 not checked. [2020-07-20 22:31:34,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:31:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 40440 backedges. 10149 proven. 5529 refuted. 0 times theorem prover too weak. 24762 trivial. 0 not checked. [2020-07-20 22:31:36,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108423077] [2020-07-20 22:31:36,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:31:36,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2020-07-20 22:31:36,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211284612] [2020-07-20 22:31:36,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 22:31:36,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:31:36,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 22:31:36,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2020-07-20 22:31:36,295 INFO L87 Difference]: Start difference. First operand 541 states and 699 transitions. Second operand 32 states. [2020-07-20 22:31:43,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:31:43,213 INFO L93 Difference]: Finished difference Result 711 states and 929 transitions. [2020-07-20 22:31:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-07-20 22:31:43,215 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 818 [2020-07-20 22:31:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:31:43,218 INFO L225 Difference]: With dead ends: 711 [2020-07-20 22:31:43,218 INFO L226 Difference]: Without dead ends: 541 [2020-07-20 22:31:43,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1712 GetRequests, 1605 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2931, Invalid=7575, Unknown=0, NotChecked=0, Total=10506 [2020-07-20 22:31:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-07-20 22:31:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2020-07-20 22:31:43,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-07-20 22:31:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 697 transitions. [2020-07-20 22:31:43,324 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 697 transitions. Word has length 818 [2020-07-20 22:31:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:31:43,325 INFO L479 AbstractCegarLoop]: Abstraction has 541 states and 697 transitions. [2020-07-20 22:31:43,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 22:31:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 697 transitions. [2020-07-20 22:31:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2020-07-20 22:31:43,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:31:43,330 INFO L422 BasicCegarLoop]: trace histogram [106, 106, 106, 105, 105, 105, 105, 19, 18, 18, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:31:43,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:43,531 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:31:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:31:43,532 INFO L82 PathProgramCache]: Analyzing trace with hash -778442869, now seen corresponding path program 36 times [2020-07-20 22:31:43,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:31:43,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358630009] [2020-07-20 22:31:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:31:43,734 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:31:43,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:31:43,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 22:31:43,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:31:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 41190 backedges. 439 proven. 15607 refuted. 0 times theorem prover too weak. 25144 trivial. 0 not checked. [2020-07-20 22:31:44,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:31:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 41190 backedges. 438 proven. 15608 refuted. 0 times theorem prover too weak. 25144 trivial. 0 not checked. [2020-07-20 22:31:46,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358630009] [2020-07-20 22:31:46,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:31:46,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2020-07-20 22:31:46,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836419868] [2020-07-20 22:31:46,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-20 22:31:46,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:31:46,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-20 22:31:46,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 22:31:46,406 INFO L87 Difference]: Start difference. First operand 541 states and 697 transitions. Second operand 39 states. [2020-07-20 22:32:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:32:02,105 INFO L93 Difference]: Finished difference Result 791 states and 1034 transitions. [2020-07-20 22:32:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2020-07-20 22:32:02,107 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 825 [2020-07-20 22:32:02,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:32:02,111 INFO L225 Difference]: With dead ends: 791 [2020-07-20 22:32:02,111 INFO L226 Difference]: Without dead ends: 605 [2020-07-20 22:32:02,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1807 GetRequests, 1605 SyntacticMatches, 7 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15667 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=7390, Invalid=31222, Unknown=0, NotChecked=0, Total=38612 [2020-07-20 22:32:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-07-20 22:32:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 571. [2020-07-20 22:32:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-07-20 22:32:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 737 transitions. [2020-07-20 22:32:02,222 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 737 transitions. Word has length 825 [2020-07-20 22:32:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:32:02,222 INFO L479 AbstractCegarLoop]: Abstraction has 571 states and 737 transitions. [2020-07-20 22:32:02,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-20 22:32:02,223 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 737 transitions. [2020-07-20 22:32:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2020-07-20 22:32:02,228 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:32:02,229 INFO L422 BasicCegarLoop]: trace histogram [114, 114, 114, 113, 113, 113, 113, 20, 19, 19, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:32:02,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:32:02,435 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:32:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:32:02,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1882081448, now seen corresponding path program 37 times [2020-07-20 22:32:02,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:32:02,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702257041] [2020-07-20 22:32:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:32:02,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:32:02,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:32:02,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 22:32:02,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:32:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 47617 backedges. 19928 proven. 2673 refuted. 0 times theorem prover too weak. 25016 trivial. 0 not checked. [2020-07-20 22:32:03,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:32:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 47617 backedges. 10790 proven. 8085 refuted. 0 times theorem prover too weak. 28742 trivial. 0 not checked. [2020-07-20 22:32:05,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702257041] [2020-07-20 22:32:05,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:32:05,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2020-07-20 22:32:05,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694087097] [2020-07-20 22:32:05,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 22:32:05,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:32:05,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 22:32:05,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 22:32:05,600 INFO L87 Difference]: Start difference. First operand 571 states and 737 transitions. Second operand 36 states. [2020-07-20 22:32:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:32:12,647 INFO L93 Difference]: Finished difference Result 742 states and 967 transitions. [2020-07-20 22:32:12,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-07-20 22:32:12,649 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 884 [2020-07-20 22:32:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:32:12,653 INFO L225 Difference]: With dead ends: 742 [2020-07-20 22:32:12,653 INFO L226 Difference]: Without dead ends: 572 [2020-07-20 22:32:12,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1863 GetRequests, 1733 SyntacticMatches, 6 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3978 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4351, Invalid=11399, Unknown=0, NotChecked=0, Total=15750 [2020-07-20 22:32:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2020-07-20 22:32:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 540. [2020-07-20 22:32:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-07-20 22:32:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 692 transitions. [2020-07-20 22:32:12,745 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 692 transitions. Word has length 884 [2020-07-20 22:32:12,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:32:12,746 INFO L479 AbstractCegarLoop]: Abstraction has 540 states and 692 transitions. [2020-07-20 22:32:12,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 22:32:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 692 transitions. [2020-07-20 22:32:12,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2020-07-20 22:32:12,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:32:12,752 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 115, 114, 114, 114, 114, 20, 19, 19, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:32:12,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:32:12,953 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:32:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:32:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash 932118245, now seen corresponding path program 38 times [2020-07-20 22:32:12,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:32:12,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166733531] [2020-07-20 22:32:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:32:13,170 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:32:13,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:32:13,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 22:32:13,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:32:13,808 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:32:13,809 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:32:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 48431 backedges. 17979 proven. 150 refuted. 0 times theorem prover too weak. 30302 trivial. 0 not checked. [2020-07-20 22:32:14,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:32:14,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:32:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 48431 backedges. 7048 proven. 11081 refuted. 0 times theorem prover too weak. 30302 trivial. 0 not checked. [2020-07-20 22:32:16,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166733531] [2020-07-20 22:32:16,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:32:16,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2020-07-20 22:32:16,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662652366] [2020-07-20 22:32:16,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 22:32:16,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:32:16,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 22:32:16,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=854, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 22:32:16,270 INFO L87 Difference]: Start difference. First operand 540 states and 692 transitions. Second operand 36 states. [2020-07-20 22:32:20,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:32:20,135 INFO L93 Difference]: Finished difference Result 690 states and 898 transitions. [2020-07-20 22:32:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-07-20 22:32:20,137 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 891 [2020-07-20 22:32:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:32:20,142 INFO L225 Difference]: With dead ends: 690 [2020-07-20 22:32:20,142 INFO L226 Difference]: Without dead ends: 688 [2020-07-20 22:32:20,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1853 GetRequests, 1757 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2506 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2537, Invalid=5835, Unknown=0, NotChecked=0, Total=8372 [2020-07-20 22:32:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2020-07-20 22:32:20,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 610. [2020-07-20 22:32:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-07-20 22:32:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 794 transitions. [2020-07-20 22:32:20,250 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 794 transitions. Word has length 891 [2020-07-20 22:32:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:32:20,251 INFO L479 AbstractCegarLoop]: Abstraction has 610 states and 794 transitions. [2020-07-20 22:32:20,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 22:32:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 794 transitions. [2020-07-20 22:32:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 934 [2020-07-20 22:32:20,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:32:20,261 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 121, 120, 120, 120, 120, 20, 19, 19, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:32:20,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:32:20,473 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:32:20,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:32:20,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1311394747, now seen corresponding path program 39 times [2020-07-20 22:32:20,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:32:20,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163423221] [2020-07-20 22:32:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:32:20,701 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:32:20,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:32:20,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 22:32:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:32:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 53462 backedges. 4622 proven. 19114 refuted. 0 times theorem prover too weak. 29726 trivial. 0 not checked. [2020-07-20 22:32:22,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:32:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 53462 backedges. 2331 proven. 19115 refuted. 0 times theorem prover too weak. 32016 trivial. 0 not checked. [2020-07-20 22:32:24,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163423221] [2020-07-20 22:32:24,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:32:24,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 43 [2020-07-20 22:32:24,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310858309] [2020-07-20 22:32:24,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 22:32:24,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:32:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 22:32:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 22:32:24,415 INFO L87 Difference]: Start difference. First operand 610 states and 794 transitions. Second operand 43 states. [2020-07-20 22:32:46,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:32:46,403 INFO L93 Difference]: Finished difference Result 911 states and 1218 transitions. [2020-07-20 22:32:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-07-20 22:32:46,406 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 933 [2020-07-20 22:32:46,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:32:46,410 INFO L225 Difference]: With dead ends: 911 [2020-07-20 22:32:46,410 INFO L226 Difference]: Without dead ends: 695 [2020-07-20 22:32:46,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2036 GetRequests, 1817 SyntacticMatches, 7 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18507 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=8934, Invalid=36648, Unknown=0, NotChecked=0, Total=45582 [2020-07-20 22:32:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-07-20 22:32:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 643. [2020-07-20 22:32:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-07-20 22:32:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 838 transitions. [2020-07-20 22:32:46,528 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 838 transitions. Word has length 933 [2020-07-20 22:32:46,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:32:46,529 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 838 transitions. [2020-07-20 22:32:46,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-20 22:32:46,529 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 838 transitions. [2020-07-20 22:32:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2020-07-20 22:32:46,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:32:46,540 INFO L422 BasicCegarLoop]: trace histogram [130, 130, 130, 129, 129, 129, 129, 21, 20, 20, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:32:46,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:32:46,755 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:32:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:32:46,756 INFO L82 PathProgramCache]: Analyzing trace with hash -874980193, now seen corresponding path program 40 times [2020-07-20 22:32:46,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:32:46,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207301132] [2020-07-20 22:32:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:32:46,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:32:46,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:32:46,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 22:32:46,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:32:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 61675 backedges. 28429 proven. 3266 refuted. 0 times theorem prover too weak. 29980 trivial. 0 not checked. [2020-07-20 22:32:48,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:32:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 61675 backedges. 13923 proven. 10962 refuted. 0 times theorem prover too weak. 36790 trivial. 0 not checked. [2020-07-20 22:32:51,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207301132] [2020-07-20 22:32:51,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:32:51,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 40 [2020-07-20 22:32:51,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691351393] [2020-07-20 22:32:51,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 22:32:51,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:32:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 22:32:51,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 22:32:51,155 INFO L87 Difference]: Start difference. First operand 643 states and 838 transitions. Second operand 40 states. [2020-07-20 22:33:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:02,811 INFO L93 Difference]: Finished difference Result 1106 states and 1481 transitions. [2020-07-20 22:33:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-07-20 22:33:02,813 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 999 [2020-07-20 22:33:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:02,818 INFO L225 Difference]: With dead ends: 1106 [2020-07-20 22:33:02,818 INFO L226 Difference]: Without dead ends: 715 [2020-07-20 22:33:02,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2114 GetRequests, 1959 SyntacticMatches, 6 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5991 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=6299, Invalid=16351, Unknown=0, NotChecked=0, Total=22650 [2020-07-20 22:33:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-07-20 22:33:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 695. [2020-07-20 22:33:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-07-20 22:33:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 913 transitions. [2020-07-20 22:33:02,961 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 913 transitions. Word has length 999 [2020-07-20 22:33:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:02,962 INFO L479 AbstractCegarLoop]: Abstraction has 695 states and 913 transitions. [2020-07-20 22:33:02,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 22:33:02,962 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 913 transitions. [2020-07-20 22:33:02,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2020-07-20 22:33:02,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:02,973 INFO L422 BasicCegarLoop]: trace histogram [131, 131, 131, 130, 130, 130, 130, 21, 20, 20, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:03,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:03,189 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:03,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1744475458, now seen corresponding path program 41 times [2020-07-20 22:33:03,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:03,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033056540] [2020-07-20 22:33:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:03,435 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:33:03,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:03,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 22:33:03,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 62602 backedges. 4173 proven. 23309 refuted. 0 times theorem prover too weak. 35120 trivial. 0 not checked. [2020-07-20 22:33:05,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 62602 backedges. 2164 proven. 23310 refuted. 0 times theorem prover too weak. 37128 trivial. 0 not checked. [2020-07-20 22:33:08,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033056540] [2020-07-20 22:33:08,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:08,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 47 [2020-07-20 22:33:08,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476168477] [2020-07-20 22:33:08,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-20 22:33:08,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-20 22:33:08,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 22:33:08,536 INFO L87 Difference]: Start difference. First operand 695 states and 913 transitions. Second operand 47 states. [2020-07-20 22:33:41,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:41,360 INFO L93 Difference]: Finished difference Result 1178 states and 1580 transitions. [2020-07-20 22:33:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2020-07-20 22:33:41,364 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 1006 [2020-07-20 22:33:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:41,369 INFO L225 Difference]: With dead ends: 1178 [2020-07-20 22:33:41,369 INFO L226 Difference]: Without dead ends: 871 [2020-07-20 22:33:41,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2199 GetRequests, 1959 SyntacticMatches, 7 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22228 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=10926, Invalid=44064, Unknown=0, NotChecked=0, Total=54990 [2020-07-20 22:33:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2020-07-20 22:33:41,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 733. [2020-07-20 22:33:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-07-20 22:33:41,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 965 transitions. [2020-07-20 22:33:41,507 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 965 transitions. Word has length 1006 [2020-07-20 22:33:41,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:41,508 INFO L479 AbstractCegarLoop]: Abstraction has 733 states and 965 transitions. [2020-07-20 22:33:41,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-20 22:33:41,508 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 965 transitions. [2020-07-20 22:33:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1083 [2020-07-20 22:33:41,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:41,521 INFO L422 BasicCegarLoop]: trace histogram [141, 141, 141, 140, 140, 140, 140, 22, 21, 21, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:41,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:41,735 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:41,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2076739844, now seen corresponding path program 42 times [2020-07-20 22:33:41,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:41,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040592124] [2020-07-20 22:33:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:41,937 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:33:41,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:41,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 22:33:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 72506 backedges. 33195 proven. 3949 refuted. 0 times theorem prover too weak. 35362 trivial. 0 not checked. [2020-07-20 22:33:43,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72506 backedges. 15505 proven. 14169 refuted. 0 times theorem prover too weak. 42832 trivial. 0 not checked. [2020-07-20 22:33:47,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040592124] [2020-07-20 22:33:47,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:47,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 44 [2020-07-20 22:33:47,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855599773] [2020-07-20 22:33:47,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-20 22:33:47,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:47,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-20 22:33:47,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 22:33:47,726 INFO L87 Difference]: Start difference. First operand 733 states and 965 transitions. Second operand 44 states. [2020-07-20 22:34:02,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:34:02,510 INFO L93 Difference]: Finished difference Result 1089 states and 1476 transitions. [2020-07-20 22:34:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-07-20 22:34:02,514 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 1082 [2020-07-20 22:34:02,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:34:02,519 INFO L225 Difference]: With dead ends: 1089 [2020-07-20 22:34:02,519 INFO L226 Difference]: Without dead ends: 804 [2020-07-20 22:34:02,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2281 GetRequests, 2121 SyntacticMatches, 6 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6334 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=6718, Invalid=17462, Unknown=0, NotChecked=0, Total=24180 [2020-07-20 22:34:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2020-07-20 22:34:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 785. [2020-07-20 22:34:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 785 states. [2020-07-20 22:34:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1040 transitions. [2020-07-20 22:34:02,673 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1040 transitions. Word has length 1082 [2020-07-20 22:34:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:34:02,674 INFO L479 AbstractCegarLoop]: Abstraction has 785 states and 1040 transitions. [2020-07-20 22:34:02,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-20 22:34:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1040 transitions. [2020-07-20 22:34:02,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1090 [2020-07-20 22:34:02,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:34:02,685 INFO L422 BasicCegarLoop]: trace histogram [142, 142, 142, 141, 141, 141, 141, 22, 21, 21, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:34:02,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:34:02,900 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:34:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:34:02,901 INFO L82 PathProgramCache]: Analyzing trace with hash -690954159, now seen corresponding path program 43 times [2020-07-20 22:34:02,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:34:02,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369310155] [2020-07-20 22:34:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:34:03,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:34:03,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:34:03,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 22:34:03,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:34:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 73511 backedges. 8101 proven. 22805 refuted. 0 times theorem prover too weak. 42605 trivial. 0 not checked. [2020-07-20 22:34:04,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:34:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 73511 backedges. 3860 proven. 22806 refuted. 0 times theorem prover too weak. 46845 trivial. 0 not checked. [2020-07-20 22:34:07,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369310155] [2020-07-20 22:34:07,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:34:07,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2020-07-20 22:34:07,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827816290] [2020-07-20 22:34:07,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 22:34:07,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:34:07,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 22:34:07,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2020-07-20 22:34:07,831 INFO L87 Difference]: Start difference. First operand 785 states and 1040 transitions. Second operand 30 states. [2020-07-20 22:34:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:34:21,035 INFO L93 Difference]: Finished difference Result 1691 states and 2300 transitions. [2020-07-20 22:34:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-07-20 22:34:21,039 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1089 [2020-07-20 22:34:21,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:34:21,047 INFO L225 Difference]: With dead ends: 1691 [2020-07-20 22:34:21,047 INFO L226 Difference]: Without dead ends: 1390 [2020-07-20 22:34:21,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2275 GetRequests, 2141 SyntacticMatches, 8 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6349 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=3306, Invalid=12950, Unknown=0, NotChecked=0, Total=16256 [2020-07-20 22:34:21,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2020-07-20 22:34:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 984. [2020-07-20 22:34:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-07-20 22:34:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1300 transitions. [2020-07-20 22:34:21,275 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1300 transitions. Word has length 1089 [2020-07-20 22:34:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:34:21,276 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1300 transitions. [2020-07-20 22:34:21,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 22:34:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1300 transitions. [2020-07-20 22:34:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2020-07-20 22:34:21,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:34:21,286 INFO L422 BasicCegarLoop]: trace histogram [148, 148, 148, 147, 147, 147, 147, 23, 22, 22, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:34:21,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:34:21,487 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:34:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:34:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash -944230286, now seen corresponding path program 44 times [2020-07-20 22:34:21,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:34:21,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920678856] [2020-07-20 22:34:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:34:21,698 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:34:21,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:34:21,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 22:34:21,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:34:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 79907 backedges. 34637 proven. 2618 refuted. 0 times theorem prover too weak. 42652 trivial. 0 not checked. [2020-07-20 22:34:22,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:34:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 79907 backedges. 26747 proven. 2618 refuted. 0 times theorem prover too weak. 50542 trivial. 0 not checked. [2020-07-20 22:34:26,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920678856] [2020-07-20 22:34:26,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:34:26,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2020-07-20 22:34:26,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285700614] [2020-07-20 22:34:26,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 22:34:26,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:34:26,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 22:34:26,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2020-07-20 22:34:26,454 INFO L87 Difference]: Start difference. First operand 984 states and 1300 transitions. Second operand 27 states. [2020-07-20 22:34:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:34:32,363 INFO L93 Difference]: Finished difference Result 1307 states and 1759 transitions. [2020-07-20 22:34:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-20 22:34:32,367 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 1134 [2020-07-20 22:34:32,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:34:32,373 INFO L225 Difference]: With dead ends: 1307 [2020-07-20 22:34:32,373 INFO L226 Difference]: Without dead ends: 810 [2020-07-20 22:34:32,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2319 GetRequests, 2242 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1491, Invalid=3621, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 22:34:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-07-20 22:34:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 810. [2020-07-20 22:34:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 810 states. [2020-07-20 22:34:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1070 transitions. [2020-07-20 22:34:32,533 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1070 transitions. Word has length 1134 [2020-07-20 22:34:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:34:32,534 INFO L479 AbstractCegarLoop]: Abstraction has 810 states and 1070 transitions. [2020-07-20 22:34:32,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 22:34:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1070 transitions. [2020-07-20 22:34:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2020-07-20 22:34:32,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:34:32,545 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 149, 148, 148, 148, 148, 23, 22, 22, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:34:32,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:34:32,746 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:34:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:34:32,747 INFO L82 PathProgramCache]: Analyzing trace with hash -211111029, now seen corresponding path program 45 times [2020-07-20 22:34:32,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:34:32,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490549525] [2020-07-20 22:34:32,748 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:34:33,071 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:34:33,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:34:33,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 22:34:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:34:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 80962 backedges. 7593 proven. 26378 refuted. 0 times theorem prover too weak. 46991 trivial. 0 not checked. [2020-07-20 22:34:34,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:34:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 80962 backedges. 3658 proven. 26379 refuted. 0 times theorem prover too weak. 50925 trivial. 0 not checked. [2020-07-20 22:34:38,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490549525] [2020-07-20 22:34:38,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:34:38,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 34 [2020-07-20 22:34:38,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516100412] [2020-07-20 22:34:38,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 22:34:38,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:34:38,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 22:34:38,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 22:34:38,825 INFO L87 Difference]: Start difference. First operand 810 states and 1070 transitions. Second operand 34 states. [2020-07-20 22:34:40,449 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-07-20 22:34:40,655 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:34:40,846 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:34:41,049 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2020-07-20 22:34:42,386 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-07-20 22:34:42,597 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:34:42,788 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:34:42,974 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:34:43,186 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:34:45,753 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:34:45,980 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:34:46,195 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:34:46,393 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:34:46,602 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:34:46,830 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:34:50,231 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:34:50,502 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:34:50,766 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:34:51,007 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:34:51,240 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:34:51,485 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:34:51,737 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:34:57,585 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:34:57,877 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:34:58,159 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:34:58,422 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:34:58,685 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:34:58,935 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:34:59,179 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:34:59,436 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-07-20 22:35:04,015 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-07-20 22:35:04,610 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:35:04,878 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:35:05,128 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:35:05,374 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:35:05,625 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:35:05,868 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:35:06,098 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:35:06,297 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:35:06,737 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:35:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:35:07,406 INFO L93 Difference]: Finished difference Result 1330 states and 1815 transitions. [2020-07-20 22:35:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2020-07-20 22:35:07,410 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 1141 [2020-07-20 22:35:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:35:07,416 INFO L225 Difference]: With dead ends: 1330 [2020-07-20 22:35:07,417 INFO L226 Difference]: Without dead ends: 1019 [2020-07-20 22:35:07,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2435 GetRequests, 2241 SyntacticMatches, 8 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14972 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=6712, Invalid=28444, Unknown=0, NotChecked=0, Total=35156 [2020-07-20 22:35:07,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2020-07-20 22:35:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 837. [2020-07-20 22:35:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2020-07-20 22:35:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1106 transitions. [2020-07-20 22:35:07,601 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1106 transitions. Word has length 1141 [2020-07-20 22:35:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:35:07,601 INFO L479 AbstractCegarLoop]: Abstraction has 837 states and 1106 transitions. [2020-07-20 22:35:07,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 22:35:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1106 transitions. [2020-07-20 22:35:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1194 [2020-07-20 22:35:07,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:35:07,613 INFO L422 BasicCegarLoop]: trace histogram [156, 156, 156, 155, 155, 155, 155, 24, 23, 23, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:35:07,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:35:07,814 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:35:07,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:35:07,815 INFO L82 PathProgramCache]: Analyzing trace with hash -2061681211, now seen corresponding path program 46 times [2020-07-20 22:35:07,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:35:07,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538256929] [2020-07-20 22:35:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:35:08,051 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:35:08,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:35:08,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1349 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 22:35:08,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:35:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 88773 backedges. 38517 proven. 3198 refuted. 0 times theorem prover too weak. 47058 trivial. 0 not checked. [2020-07-20 22:35:09,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:35:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 88773 backedges. 27160 proven. 6185 refuted. 0 times theorem prover too weak. 55428 trivial. 0 not checked. [2020-07-20 22:35:14,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538256929] [2020-07-20 22:35:14,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:35:14,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2020-07-20 22:35:14,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072804366] [2020-07-20 22:35:14,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 22:35:14,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:35:14,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 22:35:14,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2020-07-20 22:35:14,092 INFO L87 Difference]: Start difference. First operand 837 states and 1106 transitions. Second operand 31 states. [2020-07-20 22:35:24,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:35:24,825 INFO L93 Difference]: Finished difference Result 1138 states and 1536 transitions. [2020-07-20 22:35:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-07-20 22:35:24,830 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 1193 [2020-07-20 22:35:24,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:35:24,834 INFO L225 Difference]: With dead ends: 1138 [2020-07-20 22:35:24,834 INFO L226 Difference]: Without dead ends: 837 [2020-07-20 22:35:24,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2457 GetRequests, 2356 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2584, Invalid=6536, Unknown=0, NotChecked=0, Total=9120 [2020-07-20 22:35:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-07-20 22:35:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 837. [2020-07-20 22:35:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2020-07-20 22:35:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1104 transitions. [2020-07-20 22:35:24,996 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1104 transitions. Word has length 1193 [2020-07-20 22:35:24,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:35:24,997 INFO L479 AbstractCegarLoop]: Abstraction has 837 states and 1104 transitions. [2020-07-20 22:35:24,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 22:35:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1104 transitions. [2020-07-20 22:35:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1201 [2020-07-20 22:35:25,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:35:25,009 INFO L422 BasicCegarLoop]: trace histogram [157, 157, 157, 156, 156, 156, 156, 24, 23, 23, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:35:25,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:35:25,210 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:35:25,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:35:25,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1739494104, now seen corresponding path program 47 times [2020-07-20 22:35:25,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:35:25,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186589897] [2020-07-20 22:35:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:35:25,497 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:35:25,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:35:25,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 22:35:25,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:35:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 89885 backedges. 7019 proven. 30608 refuted. 0 times theorem prover too weak. 52258 trivial. 0 not checked. [2020-07-20 22:35:27,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:35:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 89885 backedges. 3430 proven. 30609 refuted. 0 times theorem prover too weak. 55846 trivial. 0 not checked. [2020-07-20 22:35:32,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186589897] [2020-07-20 22:35:32,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:35:32,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 38 [2020-07-20 22:35:32,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083373568] [2020-07-20 22:35:32,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 22:35:32,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:35:32,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 22:35:32,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 22:35:32,916 INFO L87 Difference]: Start difference. First operand 837 states and 1104 transitions. Second operand 38 states. [2020-07-20 22:35:34,870 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-07-20 22:35:35,134 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:35:35,366 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:35:35,597 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2020-07-20 22:35:37,165 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-07-20 22:35:37,438 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:35:37,670 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:35:37,897 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:35:38,125 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:35:38,542 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2020-07-20 22:35:38,827 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:35:39,086 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-07-20 22:35:39,334 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:35:39,584 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:35:39,844 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2020-07-20 22:35:41,835 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:35:42,138 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:35:42,400 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:35:42,663 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:35:42,920 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:35:43,186 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:35:43,674 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:35:44,005 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:35:44,314 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:35:44,611 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:35:44,896 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:35:45,176 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:35:45,489 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:35:49,678 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:35:50,003 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:35:50,287 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:35:50,568 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:35:50,825 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:35:51,074 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:35:51,326 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:35:51,798 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:35:52,128 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:35:52,420 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:35:52,722 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:35:53,022 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:35:53,301 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:35:53,572 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:35:53,854 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-07-20 22:36:01,424 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:36:01,789 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:36:02,096 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:36:02,409 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:36:02,708 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:36:02,988 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:36:03,262 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:36:03,563 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-07-20 22:36:04,120 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:36:04,523 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:36:04,886 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:36:05,235 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:36:05,567 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:36:05,881 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:36:06,177 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:36:06,463 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:36:06,770 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:36:12,650 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-20 22:36:12,997 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-07-20 22:36:13,328 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-07-20 22:36:13,671 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-07-20 22:36:14,000 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:36:14,323 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:36:14,622 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-07-20 22:36:14,935 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-07-20 22:36:15,232 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-20 22:36:15,758 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-07-20 22:36:16,451 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:36:16,775 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-07-20 22:36:17,108 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-07-20 22:36:17,429 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:36:17,749 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:36:18,047 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:36:18,329 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-07-20 22:36:18,602 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:36:18,845 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:36:19,411 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:36:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:36:20,208 INFO L93 Difference]: Finished difference Result 1314 states and 1782 transitions. [2020-07-20 22:36:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2020-07-20 22:36:20,214 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 1200 [2020-07-20 22:36:20,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:36:20,221 INFO L225 Difference]: With dead ends: 1314 [2020-07-20 22:36:20,221 INFO L226 Difference]: Without dead ends: 1000 [2020-07-20 22:36:20,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2592 GetRequests, 2355 SyntacticMatches, 8 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23317 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=9982, Invalid=43148, Unknown=0, NotChecked=0, Total=53130 [2020-07-20 22:36:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2020-07-20 22:36:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 867. [2020-07-20 22:36:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2020-07-20 22:36:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1144 transitions. [2020-07-20 22:36:20,404 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1144 transitions. Word has length 1200 [2020-07-20 22:36:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:36:20,405 INFO L479 AbstractCegarLoop]: Abstraction has 867 states and 1144 transitions. [2020-07-20 22:36:20,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 22:36:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1144 transitions. [2020-07-20 22:36:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1260 [2020-07-20 22:36:20,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:36:20,419 INFO L422 BasicCegarLoop]: trace histogram [165, 165, 165, 164, 164, 164, 164, 25, 24, 24, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:36:20,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:36:20,620 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:36:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:36:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash -891846805, now seen corresponding path program 48 times [2020-07-20 22:36:20,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:36:20,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764763630] [2020-07-20 22:36:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:36:20,876 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:36:20,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:36:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 22:36:20,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:36:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 99275 backedges. 43091 proven. 3850 refuted. 0 times theorem prover too weak. 52334 trivial. 0 not checked. [2020-07-20 22:36:23,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:36:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 99275 backedges. 27808 proven. 10223 refuted. 0 times theorem prover too weak. 61244 trivial. 0 not checked. [2020-07-20 22:36:28,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764763630] [2020-07-20 22:36:28,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:36:28,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2020-07-20 22:36:28,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628360845] [2020-07-20 22:36:28,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 22:36:28,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:36:28,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 22:36:28,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 22:36:28,855 INFO L87 Difference]: Start difference. First operand 867 states and 1144 transitions. Second operand 35 states. [2020-07-20 22:36:44,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:36:44,388 INFO L93 Difference]: Finished difference Result 1168 states and 1573 transitions. [2020-07-20 22:36:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-07-20 22:36:44,393 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 1259 [2020-07-20 22:36:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:36:44,399 INFO L225 Difference]: With dead ends: 1168 [2020-07-20 22:36:44,399 INFO L226 Difference]: Without dead ends: 867 [2020-07-20 22:36:44,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2609 GetRequests, 2484 SyntacticMatches, 7 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3533 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=3982, Invalid=10298, Unknown=0, NotChecked=0, Total=14280 [2020-07-20 22:36:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2020-07-20 22:36:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 867. [2020-07-20 22:36:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2020-07-20 22:36:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1142 transitions. [2020-07-20 22:36:44,573 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1142 transitions. Word has length 1259 [2020-07-20 22:36:44,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:36:44,574 INFO L479 AbstractCegarLoop]: Abstraction has 867 states and 1142 transitions. [2020-07-20 22:36:44,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 22:36:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1142 transitions. [2020-07-20 22:36:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1267 [2020-07-20 22:36:44,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:36:44,588 INFO L422 BasicCegarLoop]: trace histogram [166, 166, 166, 165, 165, 165, 165, 25, 24, 24, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:36:44,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:36:44,789 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:36:44,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:36:44,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1524872590, now seen corresponding path program 49 times [2020-07-20 22:36:44,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:36:44,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100702449] [2020-07-20 22:36:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:36:45,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:36:45,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:36:45,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1902 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 22:36:45,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:36:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 100451 backedges. 6358 proven. 35576 refuted. 0 times theorem prover too weak. 58517 trivial. 0 not checked. [2020-07-20 22:36:48,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:36:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 100451 backedges. 3167 proven. 35577 refuted. 0 times theorem prover too weak. 61707 trivial. 0 not checked. [2020-07-20 22:36:54,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100702449] [2020-07-20 22:36:54,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:36:54,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 42 [2020-07-20 22:36:54,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093496038] [2020-07-20 22:36:54,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-20 22:36:54,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:36:54,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-20 22:36:54,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 22:36:54,541 INFO L87 Difference]: Start difference. First operand 867 states and 1142 transitions. Second operand 42 states. [2020-07-20 22:36:55,423 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 22:36:55,641 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 22:36:56,612 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 22:36:56,893 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:36:57,210 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:36:57,516 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:36:57,841 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:36:59,385 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 22:36:59,701 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:37:00,021 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:37:00,313 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:00,611 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:00,926 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:37:01,507 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2020-07-20 22:37:01,888 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:37:02,236 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-07-20 22:37:02,562 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:37:02,869 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:03,162 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2020-07-20 22:37:03,396 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 22:37:03,664 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 22:37:05,288 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:37:05,644 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:37:05,965 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:06,278 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:06,581 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:37:06,913 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:37:07,519 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:37:07,889 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:37:08,224 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:37:08,541 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:08,864 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:09,175 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:09,490 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:37:09,720 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 22:37:10,057 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:37:10,466 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:10,839 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:37:11,189 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:37:11,547 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:11,879 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:12,204 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:12,552 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-07-20 22:37:14,969 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 22:37:15,314 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:15,664 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:37:16,060 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:16,400 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:37:16,728 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:17,037 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:37:17,370 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-07-20 22:37:17,657 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 22:37:18,047 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:37:18,472 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:18,852 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:37:19,224 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:19,594 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:19,947 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:20,276 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:20,600 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-07-20 22:37:20,862 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 22:37:21,233 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:37:21,668 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:37:22,061 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:22,448 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:37:22,834 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:23,237 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:37:23,606 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:23,950 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:37:24,314 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:37:28,737 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:37:29,293 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 22:37:29,805 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:37:30,065 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:37:30,330 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 22:37:30,640 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 22:37:31,038 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:31,446 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:31,813 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:32,173 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:37:32,520 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:37:32,863 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:33,215 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:37:33,573 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-07-20 22:37:33,878 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 22:37:34,316 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:37:34,808 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:37:35,243 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:35,649 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:36,076 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:37:36,486 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:37:36,871 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:37,249 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:37:37,612 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:37:37,891 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-07-20 22:37:38,299 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:37:38,762 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:37:39,233 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:37:39,665 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:37:40,106 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:40,557 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:40,986 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:37:41,390 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:37:41,797 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:37:42,210 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:37:48,813 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 22:37:49,087 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2020-07-20 22:37:49,371 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-20 22:37:49,703 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-20 22:37:50,158 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-07-20 22:37:50,582 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-07-20 22:37:50,919 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-07-20 22:37:51,246 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:37:51,579 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-07-20 22:37:51,885 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:37:52,172 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-07-20 22:37:52,505 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-07-20 22:37:52,919 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-20 22:37:53,247 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 22:37:53,743 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2020-07-20 22:37:54,275 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-07-20 22:37:54,761 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-20 22:37:55,201 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-07-20 22:37:55,617 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-07-20 22:37:56,011 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-07-20 22:37:56,410 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-07-20 22:37:56,807 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-07-20 22:37:57,183 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-07-20 22:37:57,549 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-07-20 22:37:57,838 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-20 22:37:58,245 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-07-20 22:37:58,470 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-07-20 22:37:58,719 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 22:37:59,189 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:37:59,617 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-07-20 22:38:00,050 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-07-20 22:38:00,468 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:38:00,855 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:38:01,228 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:38:01,579 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-07-20 22:38:01,973 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:38:02,305 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:38:02,577 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:38:03,152 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:38:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:38:03,916 INFO L93 Difference]: Finished difference Result 1301 states and 1754 transitions. [2020-07-20 22:38:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2020-07-20 22:38:03,921 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 1266 [2020-07-20 22:38:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:38:03,927 INFO L225 Difference]: With dead ends: 1301 [2020-07-20 22:38:03,927 INFO L226 Difference]: Without dead ends: 984 [2020-07-20 22:38:03,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2747 GetRequests, 2483 SyntacticMatches, 8 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29010 ImplicationChecksByTransitivity, 57.3s TimeCoverageRelationStatistics Valid=12036, Invalid=54270, Unknown=0, NotChecked=0, Total=66306 [2020-07-20 22:38:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2020-07-20 22:38:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 900. [2020-07-20 22:38:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2020-07-20 22:38:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1186 transitions. [2020-07-20 22:38:04,136 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1186 transitions. Word has length 1266 [2020-07-20 22:38:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:38:04,137 INFO L479 AbstractCegarLoop]: Abstraction has 900 states and 1186 transitions. [2020-07-20 22:38:04,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-20 22:38:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1186 transitions. [2020-07-20 22:38:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1333 [2020-07-20 22:38:04,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:38:04,155 INFO L422 BasicCegarLoop]: trace histogram [175, 175, 175, 174, 174, 174, 174, 26, 25, 25, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:38:04,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:38:04,356 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:38:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:38:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash -719015028, now seen corresponding path program 50 times [2020-07-20 22:38:04,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:38:04,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159036217] [2020-07-20 22:38:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:38:04,628 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:38:04,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:38:04,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 22:38:04,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:38:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 111605 backedges. 48431 proven. 4583 refuted. 0 times theorem prover too weak. 58591 trivial. 0 not checked. [2020-07-20 22:38:07,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:38:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 111605 backedges. 28763 proven. 14741 refuted. 0 times theorem prover too weak. 68101 trivial. 0 not checked. [2020-07-20 22:38:14,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159036217] [2020-07-20 22:38:14,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:38:14,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2020-07-20 22:38:14,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579567229] [2020-07-20 22:38:14,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-20 22:38:14,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:38:14,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-20 22:38:14,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 22:38:14,486 INFO L87 Difference]: Start difference. First operand 900 states and 1186 transitions. Second operand 39 states. [2020-07-20 22:38:37,898 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-20 22:38:38,548 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-07-20 22:38:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:38:40,690 INFO L93 Difference]: Finished difference Result 1201 states and 1614 transitions. [2020-07-20 22:38:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-07-20 22:38:40,697 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 1332 [2020-07-20 22:38:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:38:40,703 INFO L225 Difference]: With dead ends: 1201 [2020-07-20 22:38:40,703 INFO L226 Difference]: Without dead ends: 900 [2020-07-20 22:38:40,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2776 GetRequests, 2626 SyntacticMatches, 7 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5475 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=5748, Invalid=15132, Unknown=0, NotChecked=0, Total=20880 [2020-07-20 22:38:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2020-07-20 22:38:40,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 900. [2020-07-20 22:38:40,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2020-07-20 22:38:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1184 transitions. [2020-07-20 22:38:40,906 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1184 transitions. Word has length 1332 [2020-07-20 22:38:40,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:38:40,907 INFO L479 AbstractCegarLoop]: Abstraction has 900 states and 1184 transitions. [2020-07-20 22:38:40,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-20 22:38:40,907 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1184 transitions. [2020-07-20 22:38:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1340 [2020-07-20 22:38:40,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:38:40,921 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 176, 175, 175, 175, 175, 26, 25, 25, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:38:41,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:38:41,122 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:38:41,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:38:41,123 INFO L82 PathProgramCache]: Analyzing trace with hash -78422223, now seen corresponding path program 51 times [2020-07-20 22:38:41,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:38:41,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101028268] [2020-07-20 22:38:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:38:41,457 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:38:41,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:38:41,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 2009 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 22:38:41,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:38:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 112852 backedges. 5589 proven. 41372 refuted. 0 times theorem prover too weak. 65891 trivial. 0 not checked. [2020-07-20 22:38:45,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:38:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 112852 backedges. 2860 proven. 41373 refuted. 0 times theorem prover too weak. 68619 trivial. 0 not checked. [2020-07-20 22:38:53,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101028268] [2020-07-20 22:38:53,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:38:53,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 46 [2020-07-20 22:38:53,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767766831] [2020-07-20 22:38:53,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-20 22:38:53,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:38:53,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-20 22:38:53,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1699, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 22:38:53,715 INFO L87 Difference]: Start difference. First operand 900 states and 1184 transitions. Second operand 46 states. [2020-07-20 22:38:54,376 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:38:54,623 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 22:38:54,882 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 22:38:55,168 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 22:38:55,523 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-07-20 22:38:55,764 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:38:55,989 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-07-20 22:38:56,251 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 22:38:56,573 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:38:56,939 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:38:57,283 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:38:57,583 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:38:57,847 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 22:38:58,142 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 22:38:58,531 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:38:58,801 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:38:59,030 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:38:59,280 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 22:38:59,569 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 22:38:59,938 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:00,328 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:00,689 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:01,015 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:01,339 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:01,600 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 22:39:01,966 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:02,408 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:39:02,805 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:39:03,182 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:39:03,545 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:03,930 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:39:04,255 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 22:39:04,564 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 22:39:04,960 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-07-20 22:39:05,185 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:39:05,410 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-07-20 22:39:05,866 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 22:39:06,301 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:06,674 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:06,990 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:07,299 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:07,595 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:07,900 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:08,147 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 22:39:08,489 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:08,885 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:39:09,237 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:39:09,556 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:39:09,873 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:10,179 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:10,500 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-07-20 22:39:11,153 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2020-07-20 22:39:11,551 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:11,936 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:39:12,314 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:39:12,625 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:39:12,927 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:13,219 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:13,493 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-07-20 22:39:14,360 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 22:39:14,638 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:39:14,876 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:39:15,114 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 22:39:15,596 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 22:39:15,871 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 22:39:16,239 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:16,641 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:39:16,978 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:17,304 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:17,604 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:17,895 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-07-20 22:39:18,181 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-07-20 22:39:18,576 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:18,974 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:19,367 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:19,750 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:20,119 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:20,481 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:20,806 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:21,168 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-07-20 22:39:21,911 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:39:22,369 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:39:22,788 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:23,182 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:23,516 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:23,838 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:24,158 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:24,468 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:24,808 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:25,141 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-07-20 22:39:25,607 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:39:26,190 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:39:26,748 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:27,264 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:27,760 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:28,232 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:28,697 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:29,158 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:29,589 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:30,062 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:30,457 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:39:30,866 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:39:31,323 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:39:31,659 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:39:31,954 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 22:39:32,240 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:39:32,521 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 22:39:32,799 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 22:39:33,103 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 22:39:33,446 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 22:39:33,926 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:34,434 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:34,913 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:35,346 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:39:35,784 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-07-20 22:39:36,178 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:36,566 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-07-20 22:39:36,955 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-07-20 22:39:37,258 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-07-20 22:39:37,721 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:38,274 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:38,792 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:39,279 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:39,753 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:40,205 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:40,645 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:41,071 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:41,535 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-07-20 22:39:41,935 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 22:39:42,474 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:39:43,056 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:39:43,615 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:44,127 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:44,617 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:45,121 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:45,621 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:46,104 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:46,570 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:47,028 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:47,373 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 22:39:47,902 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:39:48,522 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:39:49,106 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:49,700 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:50,235 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:39:50,783 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:51,299 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:39:51,779 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:52,248 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:52,694 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:39:53,194 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:39:53,584 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:40:00,396 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 22:40:00,732 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 22:40:01,039 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 22:40:01,349 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 22:40:01,639 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 22:40:01,929 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 22:40:02,215 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 22:40:02,522 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-20 22:40:02,834 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 22:40:03,297 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:40:03,790 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:40:04,246 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-07-20 22:40:04,707 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:40:05,177 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-07-20 22:40:05,629 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-07-20 22:40:06,134 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-07-20 22:40:06,562 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-07-20 22:40:06,975 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-07-20 22:40:07,300 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-20 22:40:07,837 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:40:08,414 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-07-20 22:40:08,957 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-07-20 22:40:09,462 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-07-20 22:40:09,979 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:40:10,477 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:40:10,949 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-07-20 22:40:11,404 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-07-20 22:40:11,831 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-07-20 22:40:12,265 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-20 22:40:12,649 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 22:40:13,223 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-20 22:40:13,866 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:40:14,443 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-07-20 22:40:15,010 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-07-20 22:40:15,559 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-07-20 22:40:16,099 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:40:16,626 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-20 22:40:17,152 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-07-20 22:40:17,588 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-07-20 22:40:18,024 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-07-20 22:40:18,429 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-20 22:40:18,764 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-20 22:40:19,186 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-07-20 22:40:19,450 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-07-20 22:40:19,720 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 22:40:20,259 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:40:20,735 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:40:21,203 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:40:21,664 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:40:22,099 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:40:22,530 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:40:22,949 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-07-20 22:40:23,343 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:40:23,732 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:40:24,125 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:40:24,459 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-07-20 22:40:25,322 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-07-20 22:40:26,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:40:26,516 INFO L93 Difference]: Finished difference Result 1308 states and 1759 transitions. [2020-07-20 22:40:26,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2020-07-20 22:40:26,524 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 1339 [2020-07-20 22:40:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:40:26,531 INFO L225 Difference]: With dead ends: 1308 [2020-07-20 22:40:26,531 INFO L226 Difference]: Without dead ends: 988 [2020-07-20 22:40:26,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2917 GetRequests, 2625 SyntacticMatches, 8 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36074 ImplicationChecksByTransitivity, 78.3s TimeCoverageRelationStatistics Valid=15121, Invalid=66389, Unknown=0, NotChecked=0, Total=81510 [2020-07-20 22:40:26,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2020-07-20 22:40:26,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 936. [2020-07-20 22:40:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2020-07-20 22:40:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1232 transitions. [2020-07-20 22:40:26,751 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1232 transitions. Word has length 1339 [2020-07-20 22:40:26,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:40:26,752 INFO L479 AbstractCegarLoop]: Abstraction has 936 states and 1232 transitions. [2020-07-20 22:40:26,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-20 22:40:26,752 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1232 transitions. [2020-07-20 22:40:26,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1413 [2020-07-20 22:40:26,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:40:26,769 INFO L422 BasicCegarLoop]: trace histogram [186, 186, 186, 185, 185, 185, 185, 27, 26, 26, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:40:26,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:40:26,970 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:40:26,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:40:26,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2025630034, now seen corresponding path program 52 times [2020-07-20 22:40:26,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:40:26,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007667846] [2020-07-20 22:40:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:40:27,257 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:40:27,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:40:27,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 22:40:27,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:40:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 125976 backedges. 54618 proven. 5406 refuted. 0 times theorem prover too weak. 65952 trivial. 0 not checked. [2020-07-20 22:40:30,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:40:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 125976 backedges. 30106 proven. 19748 refuted. 0 times theorem prover too weak. 76122 trivial. 0 not checked. [2020-07-20 22:40:40,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007667846] [2020-07-20 22:40:40,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:40:40,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 43 [2020-07-20 22:40:40,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029858545] [2020-07-20 22:40:40,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 22:40:40,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:40:40,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 22:40:40,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 22:40:40,871 INFO L87 Difference]: Start difference. First operand 936 states and 1232 transitions. Second operand 43 states. [2020-07-20 22:41:13,050 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 22:41:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:41:16,319 INFO L93 Difference]: Finished difference Result 1237 states and 1659 transitions. [2020-07-20 22:41:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2020-07-20 22:41:16,328 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 1412 [2020-07-20 22:41:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:41:16,335 INFO L225 Difference]: With dead ends: 1237 [2020-07-20 22:41:16,336 INFO L226 Difference]: Without dead ends: 936 [2020-07-20 22:41:16,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2959 GetRequests, 2782 SyntacticMatches, 7 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8065 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=8039, Invalid=21373, Unknown=0, NotChecked=0, Total=29412 [2020-07-20 22:41:16,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2020-07-20 22:41:16,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 887. [2020-07-20 22:41:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2020-07-20 22:41:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1159 transitions. [2020-07-20 22:41:16,586 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1159 transitions. Word has length 1412 [2020-07-20 22:41:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:41:16,587 INFO L479 AbstractCegarLoop]: Abstraction has 887 states and 1159 transitions. [2020-07-20 22:41:16,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-20 22:41:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1159 transitions. [2020-07-20 22:41:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1420 [2020-07-20 22:41:16,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:41:16,605 INFO L422 BasicCegarLoop]: trace histogram [187, 187, 187, 186, 186, 186, 186, 27, 26, 26, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:41:16,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:16,806 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:41:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:41:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1207336619, now seen corresponding path program 53 times [2020-07-20 22:41:16,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:41:16,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744180141] [2020-07-20 22:41:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:17,167 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:41:17,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:41:17,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2127 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 22:41:17,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:41:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 127301 backedges. 4691 proven. 48095 refuted. 0 times theorem prover too weak. 74515 trivial. 0 not checked. [2020-07-20 22:41:22,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:41:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 127301 backedges. 2500 proven. 48096 refuted. 0 times theorem prover too weak. 76705 trivial. 0 not checked. [2020-07-20 22:41:31,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744180141] [2020-07-20 22:41:31,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:41:31,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 50 [2020-07-20 22:41:31,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030896930] [2020-07-20 22:41:31,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 22:41:31,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:41:31,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 22:41:31,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 22:41:31,747 INFO L87 Difference]: Start difference. First operand 887 states and 1159 transitions. Second operand 50 states. [2020-07-20 22:41:32,554 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 22:41:32,863 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 22:41:33,166 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 22:41:33,575 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-07-20 22:41:33,895 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:41:34,177 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 22:41:34,529 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 22:41:34,953 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:41:35,428 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:41:35,834 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:41:36,275 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:41:36,635 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 22:41:36,973 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:41:37,436 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 22:41:37,786 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:41:38,183 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 22:41:38,570 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-07-20 22:41:39,031 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:41:39,493 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:41:39,897 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:41:40,296 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:41:40,721 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:41:41,097 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 22:41:41,570 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:41:42,100 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:41:42,586 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:41:43,043 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:41:43,505 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:41:43,941 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:41:44,279 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 22:41:44,672 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 22:41:45,169 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:41:45,542 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:41:45,856 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 22:41:46,172 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:41:46,511 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 22:41:47,158 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:41:47,677 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:41:48,143 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:41:48,570 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:41:49,005 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-07-20 22:41:49,490 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-07-20 22:41:49,910 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 22:41:50,452 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:41:51,044 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:41:51,566 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:41:52,054 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:41:52,533 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:41:52,971 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:41:53,439 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-07-20 22:41:53,825 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-07-20 22:41:54,331 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:41:54,929 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:41:55,523 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:41:56,076 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:41:56,586 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:41:57,079 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:41:57,563 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:41:58,116 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-07-20 22:41:58,579 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 22:41:58,990 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-07-20 22:41:59,528 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-07-20 22:41:59,965 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:42:00,320 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:42:00,682 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-07-20 22:42:01,001 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:42:01,323 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2020-07-20 22:42:01,721 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 22:42:02,238 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:02,773 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:03,280 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:03,784 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:04,249 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:04,705 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:42:05,222 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-07-20 22:42:05,973 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:06,579 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:42:07,109 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:42:07,639 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:08,163 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:42:08,642 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:09,104 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:42:09,588 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-07-20 22:42:09,959 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-07-20 22:42:10,531 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:11,233 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-07-20 22:42:11,845 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:42:12,499 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:13,109 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:42:13,669 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:14,215 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-07-20 22:42:14,750 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:15,360 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-07-20 22:42:15,842 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 22:42:16,516 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:42:17,281 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:42:17,997 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:18,668 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:19,307 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:19,931 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:20,521 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:21,094 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:42:21,645 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:22,193 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:42:22,588 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 22:42:23,078 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-07-20 22:42:23,633 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 22:42:24,066 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:42:24,467 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:42:24,825 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 22:42:25,201 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 22:42:25,553 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 22:42:25,932 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 22:42:26,363 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-07-20 22:42:26,941 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:27,517 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:28,051 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-07-20 22:42:28,495 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:28,945 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:42:29,376 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-07-20 22:42:29,818 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-07-20 22:42:30,273 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-07-20 22:42:30,667 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 22:42:31,245 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:31,857 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:32,408 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:32,941 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:33,487 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:34,020 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:34,501 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:42:34,995 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:35,450 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-07-20 22:42:36,062 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:36,689 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:37,238 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:37,731 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:38,220 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:38,711 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:39,273 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:39,900 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:40,422 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:41,005 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-07-20 22:42:41,522 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 22:42:42,214 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:42,963 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2020-07-20 22:42:43,743 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:42:44,472 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:42:45,188 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:45,891 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:46,584 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:47,237 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-07-20 22:42:47,890 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-07-20 22:42:48,478 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-07-20 22:42:49,054 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-07-20 22:42:49,500 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 22:42:50,165 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-07-20 22:42:50,944 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:42:51,713 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:52,480 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-07-20 22:42:53,247 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:42:53,954 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:54,670 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-07-20 22:42:55,329 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:42:55,998 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-07-20 22:42:56,610 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:57,198 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-07-20 22:42:57,805 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-07-20 22:42:58,290 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 22:42:58,885 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 22:42:59,310 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 22:42:59,816 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 22:43:00,224 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 22:43:00,634 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2020-07-20 22:43:01,023 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 22:43:01,405 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 22:43:01,780 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 22:43:02,182 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18