/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:36:02,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:36:02,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:36:02,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:36:02,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:36:02,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:36:02,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:36:02,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:36:02,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:36:02,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:36:02,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:36:02,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:36:02,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:36:02,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:36:02,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:36:02,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:36:02,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:36:02,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:36:02,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:36:02,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:36:02,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:36:02,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:36:02,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:36:02,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:36:02,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:36:02,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:36:02,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:36:02,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:36:02,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:36:02,181 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:36:02,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:36:02,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:36:02,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:36:02,186 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:36:02,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:36:02,189 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:36:02,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:36:02,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:36:02,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:36:02,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:36:02,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:36:02,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:36:02,190 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:36:02,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:36:02,190 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:36:02,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:36:02,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:36:02,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:36:02,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:36:02,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:36:02,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:36:02,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:36:02,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:36:02,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:36:02,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:36:02,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:02,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:36:02,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:36:02,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:36:02,494 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:36:02,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:36:02,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:36:02,512 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:36:02,512 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:36:02,513 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-20 21:36:02,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99fcec9dd/b74aad7204484bfa891841f05e902fe0/FLAG5a878fad3 [2020-07-20 21:36:02,996 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:36:02,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-20 21:36:03,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99fcec9dd/b74aad7204484bfa891841f05e902fe0/FLAG5a878fad3 [2020-07-20 21:36:03,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99fcec9dd/b74aad7204484bfa891841f05e902fe0 [2020-07-20 21:36:03,387 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:36:03,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:36:03,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:36:03,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:36:03,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:36:03,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:36:03" (1/1) ... [2020-07-20 21:36:03,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a926594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:03, skipping insertion in model container [2020-07-20 21:36:03,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:36:03" (1/1) ... [2020-07-20 21:36:03,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:36:03,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:36:03,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:36:03,660 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:36:03,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:36:03,698 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:36:03,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:03 WrapperNode [2020-07-20 21:36:03,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:36:03,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:36:03,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:36:03,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:36:03,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:03" (1/1) ... [2020-07-20 21:36:03,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:03" (1/1) ... [2020-07-20 21:36:03,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:03" (1/1) ... [2020-07-20 21:36:03,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:03" (1/1) ... [2020-07-20 21:36:03,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:03" (1/1) ... [2020-07-20 21:36:03,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:03" (1/1) ... [2020-07-20 21:36:03,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:03" (1/1) ... [2020-07-20 21:36:03,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:36:03,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:36:03,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:36:03,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:36:03,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:36:03,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:36:03,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:36:03,924 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 21:36:03,924 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 21:36:03,924 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:36:03,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:36:03,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:36:03,926 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 21:36:03,926 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 21:36:03,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:36:03,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:36:03,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:36:04,163 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:36:04,163 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:36:04,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:36:04 BoogieIcfgContainer [2020-07-20 21:36:04,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:36:04,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:36:04,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:36:04,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:36:04,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:36:03" (1/3) ... [2020-07-20 21:36:04,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327924ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:36:04, skipping insertion in model container [2020-07-20 21:36:04,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:03" (2/3) ... [2020-07-20 21:36:04,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327924ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:36:04, skipping insertion in model container [2020-07-20 21:36:04,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:36:04" (3/3) ... [2020-07-20 21:36:04,178 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2020-07-20 21:36:04,190 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:36:04,197 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:36:04,213 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:36:04,237 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:36:04,237 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:36:04,237 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:36:04,237 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:36:04,237 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:36:04,238 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:36:04,238 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:36:04,238 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:36:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 21:36:04,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:36:04,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:04,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:04,264 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:04,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:04,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 21:36:04,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:04,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819157670] [2020-07-20 21:36:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:04,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:36:04,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:04,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:36:04,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:36:04,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:36:04,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819157670] [2020-07-20 21:36:04,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:36:04,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:36:04,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540316709] [2020-07-20 21:36:04,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:36:04,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:04,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:36:04,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:36:04,472 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 21:36:04,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:04,605 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 21:36:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:36:04,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 21:36:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:04,620 INFO L225 Difference]: With dead ends: 44 [2020-07-20 21:36:04,620 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 21:36:04,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:36:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 21:36:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 21:36:04,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:36:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 21:36:04,664 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 21:36:04,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:04,664 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 21:36:04,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:36:04,665 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 21:36:04,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:36:04,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:04,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:04,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:04,878 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:04,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 21:36:04,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:04,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644399909] [2020-07-20 21:36:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:04,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:36:04,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:36:04,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:36:04,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:36:04,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644399909] [2020-07-20 21:36:04,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:36:04,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:36:04,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825732223] [2020-07-20 21:36:04,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:36:04,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:04,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:36:04,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:36:04,943 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 21:36:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:05,024 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 21:36:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:36:05,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 21:36:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:05,026 INFO L225 Difference]: With dead ends: 36 [2020-07-20 21:36:05,027 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 21:36:05,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:36:05,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 21:36:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 21:36:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:36:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 21:36:05,037 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 21:36:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:05,038 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 21:36:05,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:36:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 21:36:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:36:05,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:05,040 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:05,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:05,255 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:05,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 21:36:05,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:05,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955085137] [2020-07-20 21:36:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:05,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:36:05,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:36:05,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:36:05,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:05,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:05,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:36:05,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955085137] [2020-07-20 21:36:05,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:05,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 21:36:05,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245810768] [2020-07-20 21:36:05,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:36:05,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:05,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:36:05,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:36:05,586 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 21:36:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:05,697 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 21:36:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:36:05,698 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 21:36:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:05,700 INFO L225 Difference]: With dead ends: 41 [2020-07-20 21:36:05,700 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 21:36:05,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:36:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 21:36:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 21:36:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 21:36:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 21:36:05,711 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 21:36:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:05,712 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 21:36:05,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:36:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 21:36:05,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:36:05,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:05,714 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:05,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:05,928 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:05,929 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 21:36:05,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:05,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901390125] [2020-07-20 21:36:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:05,961 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:05,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:05,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:36:05,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:36:06,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:06,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:06,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:36:06,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901390125] [2020-07-20 21:36:06,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:06,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 21:36:06,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466773535] [2020-07-20 21:36:06,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:36:06,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:06,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:36:06,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:36:06,208 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 21:36:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:06,343 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 21:36:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:36:06,343 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 21:36:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:06,349 INFO L225 Difference]: With dead ends: 46 [2020-07-20 21:36:06,349 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 21:36:06,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:36:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 21:36:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 21:36:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 21:36:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 21:36:06,370 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 21:36:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:06,372 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 21:36:06,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:36:06,373 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 21:36:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 21:36:06,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:06,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:06,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:06,591 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:06,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:06,592 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 21:36:06,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:06,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190187792] [2020-07-20 21:36:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:06,630 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:06,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:06,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:36:06,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 21:36:06,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:06,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:06,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:06,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:36:07,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190187792] [2020-07-20 21:36:07,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:07,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 21:36:07,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005728580] [2020-07-20 21:36:07,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 21:36:07,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:07,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 21:36:07,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:36:07,042 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 21:36:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:07,219 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 21:36:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:36:07,220 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 21:36:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:07,222 INFO L225 Difference]: With dead ends: 51 [2020-07-20 21:36:07,222 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 21:36:07,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:36:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 21:36:07,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 21:36:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 21:36:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 21:36:07,233 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 21:36:07,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:07,234 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 21:36:07,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 21:36:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 21:36:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 21:36:07,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:07,236 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:07,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:07,451 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:07,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 21:36:07,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:07,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697147242] [2020-07-20 21:36:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:07,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:07,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:36:07,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:36:07,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:07,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:07,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:07,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:36:07,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697147242] [2020-07-20 21:36:07,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:07,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 21:36:07,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966738215] [2020-07-20 21:36:07,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 21:36:07,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:07,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 21:36:07,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:36:07,874 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 21:36:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:08,041 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 21:36:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:36:08,042 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 21:36:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:08,048 INFO L225 Difference]: With dead ends: 56 [2020-07-20 21:36:08,048 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 21:36:08,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:36:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 21:36:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 21:36:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 21:36:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 21:36:08,074 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 21:36:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:08,074 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 21:36:08,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 21:36:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 21:36:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 21:36:08,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:08,080 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:08,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:08,296 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:08,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:08,297 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 21:36:08,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:08,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031885713] [2020-07-20 21:36:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:08,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:08,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:08,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:36:08,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 21:36:08,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:08,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:08,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:08,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:08,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 21:36:08,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031885713] [2020-07-20 21:36:08,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:08,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 21:36:08,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581496734] [2020-07-20 21:36:08,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:36:08,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:36:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:36:08,946 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 21:36:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:09,144 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 21:36:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:36:09,145 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 21:36:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:09,147 INFO L225 Difference]: With dead ends: 61 [2020-07-20 21:36:09,147 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 21:36:09,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:36:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 21:36:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 21:36:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 21:36:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 21:36:09,165 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 21:36:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:09,166 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 21:36:09,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:36:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 21:36:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 21:36:09,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:09,169 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:09,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:09,377 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:09,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:09,378 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 21:36:09,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:09,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169010668] [2020-07-20 21:36:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:09,423 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:09,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:09,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:36:09,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 21:36:09,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:09,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:09,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:09,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:09,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:09,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 21:36:10,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169010668] [2020-07-20 21:36:10,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:10,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 21:36:10,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922431965] [2020-07-20 21:36:10,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:36:10,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:10,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:36:10,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:36:10,014 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-20 21:36:10,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:10,195 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 21:36:10,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:36:10,196 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 21:36:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:10,198 INFO L225 Difference]: With dead ends: 66 [2020-07-20 21:36:10,198 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 21:36:10,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:36:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 21:36:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 21:36:10,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 21:36:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 21:36:10,218 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 21:36:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:10,219 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 21:36:10,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:36:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 21:36:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 21:36:10,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:10,224 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:10,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:10,442 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:10,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:10,443 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 21:36:10,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:10,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866302592] [2020-07-20 21:36:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:10,492 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:10,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:10,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:36:10,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 21:36:10,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:11,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:11,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:11,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:11,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:11,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:11,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:11,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 21:36:11,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866302592] [2020-07-20 21:36:11,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:11,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 21:36:11,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317555644] [2020-07-20 21:36:11,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:36:11,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:11,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:36:11,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:36:11,469 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-20 21:36:11,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:11,721 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 21:36:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:36:11,721 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-20 21:36:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:11,724 INFO L225 Difference]: With dead ends: 71 [2020-07-20 21:36:11,724 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 21:36:11,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:36:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 21:36:11,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 21:36:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 21:36:11,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 21:36:11,735 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 21:36:11,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:11,736 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 21:36:11,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:36:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 21:36:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 21:36:11,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:11,738 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:11,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:11,941 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:11,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 21:36:11,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:11,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658171874] [2020-07-20 21:36:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:12,031 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:12,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:12,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:36:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 21:36:12,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:12,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:12,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:12,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:12,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 21:36:12,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658171874] [2020-07-20 21:36:12,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:12,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 21:36:12,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119422052] [2020-07-20 21:36:12,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:36:12,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:36:12,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:36:12,998 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-20 21:36:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:13,216 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-20 21:36:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:36:13,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-20 21:36:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:13,219 INFO L225 Difference]: With dead ends: 76 [2020-07-20 21:36:13,219 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 21:36:13,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:36:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 21:36:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 21:36:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 21:36:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 21:36:13,231 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-20 21:36:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:13,231 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 21:36:13,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:36:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 21:36:13,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 21:36:13,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:13,235 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:13,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:13,448 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-20 21:36:13,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:13,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549692372] [2020-07-20 21:36:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:13,555 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:13,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:13,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:36:13,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-20 21:36:13,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:14,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:14,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:14,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:15,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:15,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:15,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:15,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:15,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-20 21:36:15,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549692372] [2020-07-20 21:36:15,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:15,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 21:36:15,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17522608] [2020-07-20 21:36:15,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:36:15,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:15,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:36:15,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:36:15,313 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-20 21:36:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:15,589 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-20 21:36:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:36:15,590 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-20 21:36:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:15,593 INFO L225 Difference]: With dead ends: 81 [2020-07-20 21:36:15,593 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 21:36:15,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:36:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 21:36:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-20 21:36:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 21:36:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 21:36:15,613 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-20 21:36:15,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:15,614 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 21:36:15,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:36:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 21:36:15,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 21:36:15,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:15,618 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:15,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:15,820 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:15,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-20 21:36:15,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:15,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701812409] [2020-07-20 21:36:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:15,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:15,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:15,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:36:15,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-20 21:36:15,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:16,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:17,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:17,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:17,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:17,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:17,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:17,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-20 21:36:17,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701812409] [2020-07-20 21:36:17,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:17,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 21:36:17,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093154515] [2020-07-20 21:36:17,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:36:17,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:17,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:36:17,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:36:17,413 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-20 21:36:17,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:17,698 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-20 21:36:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:36:17,698 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-20 21:36:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:17,700 INFO L225 Difference]: With dead ends: 86 [2020-07-20 21:36:17,700 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 21:36:17,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:36:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 21:36:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-20 21:36:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 21:36:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 21:36:17,718 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-20 21:36:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:17,719 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 21:36:17,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:36:17,719 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 21:36:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-20 21:36:17,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:17,723 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:17,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:17,939 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:17,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-20 21:36:17,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:17,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419997323] [2020-07-20 21:36:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:18,055 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:18,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:18,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:36:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-20 21:36:18,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:19,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:19,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:19,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:20,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:20,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:20,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:20,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:20,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:20,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:20,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:20,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-20 21:36:20,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419997323] [2020-07-20 21:36:20,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:20,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 21:36:20,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928028218] [2020-07-20 21:36:20,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:36:20,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:20,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:36:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:36:20,382 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-20 21:36:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:20,766 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-20 21:36:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:36:20,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-20 21:36:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:20,769 INFO L225 Difference]: With dead ends: 91 [2020-07-20 21:36:20,770 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 21:36:20,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:36:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 21:36:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-20 21:36:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 21:36:20,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 21:36:20,781 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-20 21:36:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:20,781 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 21:36:20,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:36:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 21:36:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 21:36:20,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:20,785 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:20,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:20,998 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-20 21:36:20,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:21,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2720833] [2020-07-20 21:36:21,000 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:21,139 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:21,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:21,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:36:21,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-20 21:36:21,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:22,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:22,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:22,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:23,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:23,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:23,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:23,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:23,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-20 21:36:23,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2720833] [2020-07-20 21:36:23,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:23,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:36:23,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371936708] [2020-07-20 21:36:23,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:36:23,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:23,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:36:23,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:36:23,541 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 19 states. [2020-07-20 21:36:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:23,864 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-20 21:36:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:36:23,865 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-20 21:36:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:23,868 INFO L225 Difference]: With dead ends: 96 [2020-07-20 21:36:23,868 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 21:36:23,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:36:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 21:36:23,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-20 21:36:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 21:36:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 21:36:23,879 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-20 21:36:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:23,880 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 21:36:23,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:36:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 21:36:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 21:36:23,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:23,886 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:24,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:24,102 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-20 21:36:24,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:24,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698595976] [2020-07-20 21:36:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:24,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:24,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:24,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:36:24,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-20 21:36:24,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:26,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:26,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:27,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:27,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:27,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:27,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:27,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:27,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:27,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:27,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:27,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-20 21:36:28,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698595976] [2020-07-20 21:36:28,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:28,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:36:28,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522193146] [2020-07-20 21:36:28,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:36:28,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:28,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:36:28,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:36:28,089 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 21 states. [2020-07-20 21:36:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:28,514 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-20 21:36:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:36:28,515 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-07-20 21:36:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:28,521 INFO L225 Difference]: With dead ends: 101 [2020-07-20 21:36:28,521 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 21:36:28,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:36:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 21:36:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-20 21:36:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 21:36:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 21:36:28,548 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-20 21:36:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:28,549 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 21:36:28,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:36:28,549 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 21:36:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-07-20 21:36:28,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:28,553 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 19, 17, 17, 13, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 8, 8, 8, 8, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:28,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:28,754 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1494010988, now seen corresponding path program 3 times [2020-07-20 21:36:28,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:28,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783316074] [2020-07-20 21:36:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:28,942 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:28,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:28,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:36:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 533 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 21:36:29,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:30,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:30,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 554 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2020-07-20 21:36:31,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783316074] [2020-07-20 21:36:31,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:31,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:36:31,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069984446] [2020-07-20 21:36:31,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:36:31,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:31,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:36:31,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:36:31,896 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 19 states. [2020-07-20 21:36:32,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:32,247 INFO L93 Difference]: Finished difference Result 129 states and 362 transitions. [2020-07-20 21:36:32,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:36:32,248 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 297 [2020-07-20 21:36:32,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:32,252 INFO L225 Difference]: With dead ends: 129 [2020-07-20 21:36:32,252 INFO L226 Difference]: Without dead ends: 125 [2020-07-20 21:36:32,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:36:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-20 21:36:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2020-07-20 21:36:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 21:36:32,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 120 transitions. [2020-07-20 21:36:32,277 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 120 transitions. Word has length 297 [2020-07-20 21:36:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:32,279 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 120 transitions. [2020-07-20 21:36:32,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:36:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 120 transitions. [2020-07-20 21:36:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-20 21:36:32,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:32,283 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 25, 25, 25, 23, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:32,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:32,497 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash -948476032, now seen corresponding path program 1 times [2020-07-20 21:36:32,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:32,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668297881] [2020-07-20 21:36:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:32,734 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:32,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:32,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:36:32,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 707 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-20 21:36:33,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:34,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:34,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:34,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:35,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:35,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:35,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 723 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-20 21:36:35,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668297881] [2020-07-20 21:36:35,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:35,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:36:35,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185209091] [2020-07-20 21:36:35,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:36:35,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:35,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:36:35,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:36:35,317 INFO L87 Difference]: Start difference. First operand 67 states and 120 transitions. Second operand 17 states. [2020-07-20 21:36:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:35,641 INFO L93 Difference]: Finished difference Result 139 states and 413 transitions. [2020-07-20 21:36:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:36:35,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-20 21:36:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:35,648 INFO L225 Difference]: With dead ends: 139 [2020-07-20 21:36:35,648 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 21:36:35,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 790 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:36:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 21:36:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-07-20 21:36:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 21:36:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 127 transitions. [2020-07-20 21:36:35,670 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 127 transitions. Word has length 409 [2020-07-20 21:36:35,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:35,671 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 127 transitions. [2020-07-20 21:36:35,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:36:35,671 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 127 transitions. [2020-07-20 21:36:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-20 21:36:35,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:35,675 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 32, 30, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:35,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:35,889 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:35,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1385064961, now seen corresponding path program 1 times [2020-07-20 21:36:35,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:35,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648748321] [2020-07-20 21:36:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:36,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:36,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:36,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:36:36,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 323 proven. 1216 refuted. 0 times theorem prover too weak. 6692 trivial. 0 not checked. [2020-07-20 21:36:36,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:38,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:39,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 327 proven. 1245 refuted. 0 times theorem prover too weak. 6659 trivial. 0 not checked. [2020-07-20 21:36:40,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648748321] [2020-07-20 21:36:40,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:40,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:36:40,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289083046] [2020-07-20 21:36:40,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:36:40,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:40,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:36:40,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:36:40,959 INFO L87 Difference]: Start difference. First operand 69 states and 127 transitions. Second operand 21 states. [2020-07-20 21:36:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:41,481 INFO L93 Difference]: Finished difference Result 166 states and 566 transitions. [2020-07-20 21:36:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:36:41,482 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 531 [2020-07-20 21:36:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:41,484 INFO L225 Difference]: With dead ends: 166 [2020-07-20 21:36:41,484 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 21:36:41,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1025 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:36:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 21:36:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-20 21:36:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 21:36:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2020-07-20 21:36:41,505 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 531 [2020-07-20 21:36:41,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:41,506 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2020-07-20 21:36:41,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:36:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2020-07-20 21:36:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-20 21:36:41,511 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:41,511 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 28, 26, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:41,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:41,725 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:41,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:41,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2146290224, now seen corresponding path program 2 times [2020-07-20 21:36:41,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:41,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947605510] [2020-07-20 21:36:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:42,053 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:42,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:42,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:36:42,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 270 proven. 993 refuted. 0 times theorem prover too weak. 6212 trivial. 0 not checked. [2020-07-20 21:36:42,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:43,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:43,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:44,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:45,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:45,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:45,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:45,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:45,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:45,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 270 proven. 1014 refuted. 0 times theorem prover too weak. 6191 trivial. 0 not checked. [2020-07-20 21:36:45,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947605510] [2020-07-20 21:36:45,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:45,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:36:45,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026636156] [2020-07-20 21:36:45,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:36:45,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:45,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:36:45,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:36:45,644 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand 19 states. [2020-07-20 21:36:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:45,985 INFO L93 Difference]: Finished difference Result 167 states and 414 transitions. [2020-07-20 21:36:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:36:45,986 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 511 [2020-07-20 21:36:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:45,990 INFO L225 Difference]: With dead ends: 167 [2020-07-20 21:36:45,990 INFO L226 Difference]: Without dead ends: 153 [2020-07-20 21:36:45,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 989 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:36:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-20 21:36:46,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2020-07-20 21:36:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 21:36:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 160 transitions. [2020-07-20 21:36:46,007 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 160 transitions. Word has length 511 [2020-07-20 21:36:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:46,008 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 160 transitions. [2020-07-20 21:36:46,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:36:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 160 transitions. [2020-07-20 21:36:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-07-20 21:36:46,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:46,012 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 29, 29, 24, 24, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 10, 10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:46,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:46,227 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash 477279642, now seen corresponding path program 3 times [2020-07-20 21:36:46,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:46,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766130847] [2020-07-20 21:36:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:46,521 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:46,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:36:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 238 proven. 689 refuted. 0 times theorem prover too weak. 4401 trivial. 0 not checked. [2020-07-20 21:36:46,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:47,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:48,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:48,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:48,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:48,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:48,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:48,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:48,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 238 proven. 705 refuted. 0 times theorem prover too weak. 4385 trivial. 0 not checked. [2020-07-20 21:36:49,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766130847] [2020-07-20 21:36:49,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:49,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:36:49,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891172985] [2020-07-20 21:36:49,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:36:49,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:49,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:36:49,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:36:49,102 INFO L87 Difference]: Start difference. First operand 94 states and 160 transitions. Second operand 17 states. [2020-07-20 21:36:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:49,382 INFO L93 Difference]: Finished difference Result 173 states and 423 transitions. [2020-07-20 21:36:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:36:49,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 433 [2020-07-20 21:36:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:49,386 INFO L225 Difference]: With dead ends: 173 [2020-07-20 21:36:49,386 INFO L226 Difference]: Without dead ends: 158 [2020-07-20 21:36:49,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 837 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:36:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-20 21:36:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 101. [2020-07-20 21:36:49,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 21:36:49,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 180 transitions. [2020-07-20 21:36:49,403 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 180 transitions. Word has length 433 [2020-07-20 21:36:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:49,403 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 180 transitions. [2020-07-20 21:36:49,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:36:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 180 transitions. [2020-07-20 21:36:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-20 21:36:49,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:49,408 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 28, 23, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:49,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:49,621 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:49,622 INFO L82 PathProgramCache]: Analyzing trace with hash 655796629, now seen corresponding path program 4 times [2020-07-20 21:36:49,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:49,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490159809] [2020-07-20 21:36:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:49,923 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:49,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:49,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:36:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5699 backedges. 298 proven. 961 refuted. 0 times theorem prover too weak. 4440 trivial. 0 not checked. [2020-07-20 21:36:50,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:52,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:53,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:53,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:53,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:53,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:53,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:53,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:54,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:54,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:54,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:54,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5699 backedges. 300 proven. 992 refuted. 0 times theorem prover too weak. 4407 trivial. 0 not checked. [2020-07-20 21:36:54,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490159809] [2020-07-20 21:36:54,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:54,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:36:54,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945576351] [2020-07-20 21:36:54,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:36:54,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:54,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:36:54,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:36:54,316 INFO L87 Difference]: Start difference. First operand 101 states and 180 transitions. Second operand 21 states. [2020-07-20 21:36:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:54,831 INFO L93 Difference]: Finished difference Result 198 states and 537 transitions. [2020-07-20 21:36:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:36:54,832 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 448 [2020-07-20 21:36:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:54,835 INFO L225 Difference]: With dead ends: 198 [2020-07-20 21:36:54,835 INFO L226 Difference]: Without dead ends: 112 [2020-07-20 21:36:54,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 859 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:36:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-20 21:36:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-07-20 21:36:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 21:36:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 192 transitions. [2020-07-20 21:36:54,850 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 192 transitions. Word has length 448 [2020-07-20 21:36:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:54,851 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 192 transitions. [2020-07-20 21:36:54,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:36:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 192 transitions. [2020-07-20 21:36:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-07-20 21:36:54,855 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:54,856 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 24, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 10, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:55,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:55,069 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:55,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1659271138, now seen corresponding path program 5 times [2020-07-20 21:36:55,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:55,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614476442] [2020-07-20 21:36:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:55,410 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:55,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:36:55,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6007 backedges. 229 proven. 893 refuted. 0 times theorem prover too weak. 4885 trivial. 0 not checked. [2020-07-20 21:36:55,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:57,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:57,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6007 backedges. 231 proven. 912 refuted. 0 times theorem prover too weak. 4864 trivial. 0 not checked. [2020-07-20 21:36:58,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614476442] [2020-07-20 21:36:58,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:58,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:36:58,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980946907] [2020-07-20 21:36:58,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:36:58,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:58,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:36:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:36:58,825 INFO L87 Difference]: Start difference. First operand 106 states and 192 transitions. Second operand 19 states. [2020-07-20 21:36:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:59,195 INFO L93 Difference]: Finished difference Result 172 states and 408 transitions. [2020-07-20 21:36:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:36:59,198 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 460 [2020-07-20 21:36:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:59,201 INFO L225 Difference]: With dead ends: 172 [2020-07-20 21:36:59,201 INFO L226 Difference]: Without dead ends: 157 [2020-07-20 21:36:59,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 887 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:36:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-20 21:36:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2020-07-20 21:36:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-20 21:36:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-20 21:36:59,218 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 460 [2020-07-20 21:36:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:59,218 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-20 21:36:59,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:36:59,219 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-20 21:36:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-20 21:36:59,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:59,222 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 27, 27, 25, 21, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 10, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:59,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:59,437 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:59,438 INFO L82 PathProgramCache]: Analyzing trace with hash -746398909, now seen corresponding path program 6 times [2020-07-20 21:36:59,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:59,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713163949] [2020-07-20 21:36:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:59,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:59,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:59,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:36:59,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4386 backedges. 202 proven. 617 refuted. 0 times theorem prover too weak. 3567 trivial. 0 not checked. [2020-07-20 21:36:59,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:01,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:01,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:01,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:01,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4386 backedges. 202 proven. 631 refuted. 0 times theorem prover too weak. 3553 trivial. 0 not checked. [2020-07-20 21:37:02,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713163949] [2020-07-20 21:37:02,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:02,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:37:02,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030696175] [2020-07-20 21:37:02,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:37:02,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:02,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:37:02,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:37:02,271 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-20 21:37:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:02,580 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2020-07-20 21:37:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:02,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 395 [2020-07-20 21:37:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:02,584 INFO L225 Difference]: With dead ends: 190 [2020-07-20 21:37:02,584 INFO L226 Difference]: Without dead ends: 178 [2020-07-20 21:37:02,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 761 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:37:02,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-20 21:37:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2020-07-20 21:37:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-20 21:37:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-20 21:37:02,603 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 395 [2020-07-20 21:37:02,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:02,603 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-20 21:37:02,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:37:02,603 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-20 21:37:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 21:37:02,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:02,607 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 22, 22, 20, 18, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 9, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:02,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:02,821 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:02,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1086306760, now seen corresponding path program 7 times [2020-07-20 21:37:02,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:02,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636844350] [2020-07-20 21:37:02,823 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:03,179 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:03,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:03,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:37:03,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2951 backedges. 241 proven. 424 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-20 21:37:03,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:04,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:05,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:05,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:05,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:05,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2951 backedges. 243 proven. 438 refuted. 0 times theorem prover too weak. 2270 trivial. 0 not checked. [2020-07-20 21:37:05,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636844350] [2020-07-20 21:37:05,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:05,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:37:05,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824391405] [2020-07-20 21:37:05,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:37:05,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:05,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:37:05,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:37:05,424 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-20 21:37:05,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:05,717 INFO L93 Difference]: Finished difference Result 156 states and 320 transitions. [2020-07-20 21:37:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:05,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 327 [2020-07-20 21:37:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:05,721 INFO L225 Difference]: With dead ends: 156 [2020-07-20 21:37:05,722 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 21:37:05,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 625 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:37:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 21:37:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2020-07-20 21:37:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 21:37:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 230 transitions. [2020-07-20 21:37:05,737 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 230 transitions. Word has length 327 [2020-07-20 21:37:05,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:05,738 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 230 transitions. [2020-07-20 21:37:05,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:37:05,738 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 230 transitions. [2020-07-20 21:37:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2020-07-20 21:37:05,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:05,745 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 42, 42, 35, 34, 26, 26, 26, 26, 26, 26, 26, 21, 21, 21, 21, 21, 21, 21, 18, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:05,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:05,959 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:05,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:05,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2067523510, now seen corresponding path program 8 times [2020-07-20 21:37:05,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:05,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479741356] [2020-07-20 21:37:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:06,391 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:06,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:06,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:37:06,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12252 backedges. 371 proven. 1285 refuted. 0 times theorem prover too weak. 10596 trivial. 0 not checked. [2020-07-20 21:37:06,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:09,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12252 backedges. 373 proven. 1304 refuted. 0 times theorem prover too weak. 10575 trivial. 0 not checked. [2020-07-20 21:37:10,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479741356] [2020-07-20 21:37:10,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:10,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:37:10,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997030824] [2020-07-20 21:37:10,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:37:10,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:10,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:37:10,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:37:10,948 INFO L87 Difference]: Start difference. First operand 121 states and 230 transitions. Second operand 19 states. [2020-07-20 21:37:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:11,292 INFO L93 Difference]: Finished difference Result 159 states and 322 transitions. [2020-07-20 21:37:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:37:11,293 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 646 [2020-07-20 21:37:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:11,296 INFO L225 Difference]: With dead ends: 159 [2020-07-20 21:37:11,296 INFO L226 Difference]: Without dead ends: 150 [2020-07-20 21:37:11,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1298 GetRequests, 1259 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:37:11,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-20 21:37:11,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 120. [2020-07-20 21:37:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 21:37:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 218 transitions. [2020-07-20 21:37:11,314 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 218 transitions. Word has length 646 [2020-07-20 21:37:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:11,315 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 218 transitions. [2020-07-20 21:37:11,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:37:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 218 transitions. [2020-07-20 21:37:11,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2020-07-20 21:37:11,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:11,322 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 42, 42, 39, 34, 26, 26, 26, 26, 26, 26, 26, 21, 21, 21, 21, 21, 21, 21, 18, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:11,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:11,536 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash -670419218, now seen corresponding path program 9 times [2020-07-20 21:37:11,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:11,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392281942] [2020-07-20 21:37:11,538 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:11,993 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:11,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:37:12,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12398 backedges. 340 proven. 1063 refuted. 0 times theorem prover too weak. 10995 trivial. 0 not checked. [2020-07-20 21:37:12,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:14,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:14,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12398 backedges. 340 proven. 1079 refuted. 0 times theorem prover too weak. 10979 trivial. 0 not checked. [2020-07-20 21:37:15,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392281942] [2020-07-20 21:37:15,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:15,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:37:15,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852556567] [2020-07-20 21:37:15,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:37:15,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:15,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:37:15,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:37:15,744 INFO L87 Difference]: Start difference. First operand 120 states and 218 transitions. Second operand 17 states. [2020-07-20 21:37:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:16,009 INFO L93 Difference]: Finished difference Result 171 states and 354 transitions. [2020-07-20 21:37:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:16,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 650 [2020-07-20 21:37:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:16,014 INFO L225 Difference]: With dead ends: 171 [2020-07-20 21:37:16,014 INFO L226 Difference]: Without dead ends: 162 [2020-07-20 21:37:16,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1305 GetRequests, 1271 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:37:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-20 21:37:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-07-20 21:37:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-20 21:37:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 206 transitions. [2020-07-20 21:37:16,029 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 206 transitions. Word has length 650 [2020-07-20 21:37:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:16,030 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 206 transitions. [2020-07-20 21:37:16,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:37:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 206 transitions. [2020-07-20 21:37:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-07-20 21:37:16,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:16,034 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 22, 21, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:16,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:16,248 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:16,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1468081002, now seen corresponding path program 10 times [2020-07-20 21:37:16,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:16,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251734991] [2020-07-20 21:37:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:16,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:16,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:16,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:37:16,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4033 backedges. 244 proven. 420 refuted. 0 times theorem prover too weak. 3369 trivial. 0 not checked. [2020-07-20 21:37:16,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:17,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:18,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:18,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:18,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:18,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:18,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:18,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:18,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4033 backedges. 244 proven. 430 refuted. 0 times theorem prover too weak. 3359 trivial. 0 not checked. [2020-07-20 21:37:18,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251734991] [2020-07-20 21:37:18,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:18,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:37:18,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208075076] [2020-07-20 21:37:18,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:37:18,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:18,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:37:18,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:37:18,692 INFO L87 Difference]: Start difference. First operand 114 states and 206 transitions. Second operand 15 states. [2020-07-20 21:37:18,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:18,954 INFO L93 Difference]: Finished difference Result 196 states and 493 transitions. [2020-07-20 21:37:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:37:18,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 380 [2020-07-20 21:37:18,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:18,959 INFO L225 Difference]: With dead ends: 196 [2020-07-20 21:37:18,959 INFO L226 Difference]: Without dead ends: 187 [2020-07-20 21:37:18,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 735 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:37:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-20 21:37:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 116. [2020-07-20 21:37:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-20 21:37:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 214 transitions. [2020-07-20 21:37:18,981 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 214 transitions. Word has length 380 [2020-07-20 21:37:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:18,982 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 214 transitions. [2020-07-20 21:37:18,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:37:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 214 transitions. [2020-07-20 21:37:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-20 21:37:18,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:18,986 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 24, 23, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:19,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:19,200 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:19,200 INFO L82 PathProgramCache]: Analyzing trace with hash -715194433, now seen corresponding path program 11 times [2020-07-20 21:37:19,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:19,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850763753] [2020-07-20 21:37:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:19,589 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:19,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:19,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:37:19,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4969 backedges. 392 proven. 639 refuted. 0 times theorem prover too weak. 3938 trivial. 0 not checked. [2020-07-20 21:37:19,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:21,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:22,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:22,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:22,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:22,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:22,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:22,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:22,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:22,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:22,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4969 backedges. 396 proven. 659 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-20 21:37:23,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850763753] [2020-07-20 21:37:23,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:23,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:37:23,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522526082] [2020-07-20 21:37:23,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:37:23,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:37:23,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:37:23,060 INFO L87 Difference]: Start difference. First operand 116 states and 214 transitions. Second operand 19 states. [2020-07-20 21:37:23,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:23,461 INFO L93 Difference]: Finished difference Result 167 states and 335 transitions. [2020-07-20 21:37:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:37:23,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 420 [2020-07-20 21:37:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:23,466 INFO L225 Difference]: With dead ends: 167 [2020-07-20 21:37:23,466 INFO L226 Difference]: Without dead ends: 139 [2020-07-20 21:37:23,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 807 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:37:23,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-07-20 21:37:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2020-07-20 21:37:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 21:37:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 253 transitions. [2020-07-20 21:37:23,484 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 253 transitions. Word has length 420 [2020-07-20 21:37:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:23,484 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 253 transitions. [2020-07-20 21:37:23,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:37:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 253 transitions. [2020-07-20 21:37:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-07-20 21:37:23,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:23,493 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 23, 21, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:23,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:23,708 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1278468966, now seen corresponding path program 12 times [2020-07-20 21:37:23,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:23,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117002466] [2020-07-20 21:37:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:24,110 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:24,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:24,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:37:24,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4611 backedges. 289 proven. 550 refuted. 0 times theorem prover too weak. 3772 trivial. 0 not checked. [2020-07-20 21:37:24,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:25,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4611 backedges. 291 proven. 562 refuted. 0 times theorem prover too weak. 3758 trivial. 0 not checked. [2020-07-20 21:37:26,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117002466] [2020-07-20 21:37:26,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:26,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:37:26,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858814875] [2020-07-20 21:37:26,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:37:26,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:26,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:37:26,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:37:26,836 INFO L87 Difference]: Start difference. First operand 136 states and 253 transitions. Second operand 17 states. [2020-07-20 21:37:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:27,147 INFO L93 Difference]: Finished difference Result 172 states and 334 transitions. [2020-07-20 21:37:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:27,148 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 405 [2020-07-20 21:37:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:27,150 INFO L225 Difference]: With dead ends: 172 [2020-07-20 21:37:27,150 INFO L226 Difference]: Without dead ends: 163 [2020-07-20 21:37:27,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 781 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:37:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-20 21:37:27,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 134. [2020-07-20 21:37:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 21:37:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 245 transitions. [2020-07-20 21:37:27,166 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 245 transitions. Word has length 405 [2020-07-20 21:37:27,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:27,166 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 245 transitions. [2020-07-20 21:37:27,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:37:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 245 transitions. [2020-07-20 21:37:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2020-07-20 21:37:27,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:27,172 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 30, 29, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 12, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:27,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:27,385 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:27,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1840295522, now seen corresponding path program 13 times [2020-07-20 21:37:27,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:27,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358480812] [2020-07-20 21:37:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:27,849 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:27,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:27,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:37:27,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7613 backedges. 420 proven. 704 refuted. 0 times theorem prover too weak. 6489 trivial. 0 not checked. [2020-07-20 21:37:28,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:29,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:29,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7613 backedges. 422 proven. 718 refuted. 0 times theorem prover too weak. 6473 trivial. 0 not checked. [2020-07-20 21:37:30,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358480812] [2020-07-20 21:37:30,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:30,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:37:30,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43012703] [2020-07-20 21:37:30,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:37:30,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:37:30,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:37:30,961 INFO L87 Difference]: Start difference. First operand 134 states and 245 transitions. Second operand 17 states. [2020-07-20 21:37:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:31,253 INFO L93 Difference]: Finished difference Result 192 states and 420 transitions. [2020-07-20 21:37:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:31,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 516 [2020-07-20 21:37:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:31,257 INFO L225 Difference]: With dead ends: 192 [2020-07-20 21:37:31,258 INFO L226 Difference]: Without dead ends: 183 [2020-07-20 21:37:31,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1037 GetRequests, 1003 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:37:31,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-07-20 21:37:31,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 160. [2020-07-20 21:37:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-20 21:37:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 325 transitions. [2020-07-20 21:37:31,278 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 325 transitions. Word has length 516 [2020-07-20 21:37:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:31,279 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 325 transitions. [2020-07-20 21:37:31,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:37:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 325 transitions. [2020-07-20 21:37:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-07-20 21:37:31,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:31,285 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 30, 30, 24, 23, 18, 18, 18, 18, 18, 18, 18, 15, 15, 15, 15, 15, 15, 15, 14, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:31,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:31,499 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:31,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1082571894, now seen corresponding path program 14 times [2020-07-20 21:37:31,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:31,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402209367] [2020-07-20 21:37:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:31,968 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:31,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:31,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:37:31,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 503 proven. 619 refuted. 0 times theorem prover too weak. 4843 trivial. 0 not checked. [2020-07-20 21:37:32,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:34,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:34,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:34,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:34,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:34,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:34,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:35,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:35,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:35,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:35,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:35,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 507 proven. 636 refuted. 0 times theorem prover too weak. 4822 trivial. 0 not checked. [2020-07-20 21:37:35,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402209367] [2020-07-20 21:37:35,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:35,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:37:35,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031069463] [2020-07-20 21:37:35,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:37:35,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:35,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:37:35,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:37:35,804 INFO L87 Difference]: Start difference. First operand 160 states and 325 transitions. Second operand 19 states. [2020-07-20 21:37:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:36,168 INFO L93 Difference]: Finished difference Result 201 states and 439 transitions. [2020-07-20 21:37:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:37:36,169 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 456 [2020-07-20 21:37:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:36,173 INFO L225 Difference]: With dead ends: 201 [2020-07-20 21:37:36,173 INFO L226 Difference]: Without dead ends: 192 [2020-07-20 21:37:36,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 879 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:37:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-20 21:37:36,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2020-07-20 21:37:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-20 21:37:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 300 transitions. [2020-07-20 21:37:36,191 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 300 transitions. Word has length 456 [2020-07-20 21:37:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:36,192 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 300 transitions. [2020-07-20 21:37:36,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:37:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 300 transitions. [2020-07-20 21:37:36,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-20 21:37:36,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:36,197 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 24, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:36,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:36,412 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:36,413 INFO L82 PathProgramCache]: Analyzing trace with hash 635032291, now seen corresponding path program 15 times [2020-07-20 21:37:36,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:36,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682186443] [2020-07-20 21:37:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:36,849 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:36,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:36,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:37:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 397 proven. 417 refuted. 0 times theorem prover too weak. 3557 trivial. 0 not checked. [2020-07-20 21:37:36,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:38,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:38,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:38,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:38,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:38,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:38,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:38,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:39,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:39,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:39,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 399 proven. 429 refuted. 0 times theorem prover too weak. 3543 trivial. 0 not checked. [2020-07-20 21:37:39,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682186443] [2020-07-20 21:37:39,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:39,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:37:39,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892446651] [2020-07-20 21:37:39,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:37:39,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:39,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:37:39,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:37:39,532 INFO L87 Difference]: Start difference. First operand 156 states and 300 transitions. Second operand 17 states. [2020-07-20 21:37:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:39,834 INFO L93 Difference]: Finished difference Result 227 states and 515 transitions. [2020-07-20 21:37:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:39,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 395 [2020-07-20 21:37:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:39,840 INFO L225 Difference]: With dead ends: 227 [2020-07-20 21:37:39,840 INFO L226 Difference]: Without dead ends: 218 [2020-07-20 21:37:39,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 761 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:37:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-20 21:37:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 148. [2020-07-20 21:37:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-20 21:37:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 278 transitions. [2020-07-20 21:37:39,860 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 278 transitions. Word has length 395 [2020-07-20 21:37:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:39,860 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 278 transitions. [2020-07-20 21:37:39,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:37:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 278 transitions. [2020-07-20 21:37:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 21:37:39,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:39,866 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 28, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:40,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:40,080 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:40,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:40,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1096983055, now seen corresponding path program 16 times [2020-07-20 21:37:40,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:40,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065505330] [2020-07-20 21:37:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:40,546 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:40,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:40,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:37:40,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 390 proven. 467 refuted. 0 times theorem prover too weak. 5584 trivial. 0 not checked. [2020-07-20 21:37:40,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:42,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:42,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:42,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:42,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:42,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:42,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:42,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:42,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 390 proven. 479 refuted. 0 times theorem prover too weak. 5572 trivial. 0 not checked. [2020-07-20 21:37:43,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065505330] [2020-07-20 21:37:43,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:43,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:37:43,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997520929] [2020-07-20 21:37:43,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:37:43,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:43,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:37:43,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:37:43,119 INFO L87 Difference]: Start difference. First operand 148 states and 278 transitions. Second operand 15 states. [2020-07-20 21:37:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:43,413 INFO L93 Difference]: Finished difference Result 255 states and 637 transitions. [2020-07-20 21:37:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:37:43,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 476 [2020-07-20 21:37:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:43,419 INFO L225 Difference]: With dead ends: 255 [2020-07-20 21:37:43,419 INFO L226 Difference]: Without dead ends: 246 [2020-07-20 21:37:43,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 927 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:37:43,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-20 21:37:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 150. [2020-07-20 21:37:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-20 21:37:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 286 transitions. [2020-07-20 21:37:43,444 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 286 transitions. Word has length 476 [2020-07-20 21:37:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:43,445 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 286 transitions. [2020-07-20 21:37:43,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:37:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 286 transitions. [2020-07-20 21:37:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-07-20 21:37:43,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:43,450 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 26, 25, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:43,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:43,664 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1003834752, now seen corresponding path program 17 times [2020-07-20 21:37:43,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:43,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717761469] [2020-07-20 21:37:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:44,132 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:44,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:44,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:37:44,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6005 backedges. 466 proven. 500 refuted. 0 times theorem prover too weak. 5039 trivial. 0 not checked. [2020-07-20 21:37:44,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:45,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:46,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:46,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:46,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:46,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:46,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:46,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6005 backedges. 466 proven. 516 refuted. 0 times theorem prover too weak. 5023 trivial. 0 not checked. [2020-07-20 21:37:47,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717761469] [2020-07-20 21:37:47,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:47,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:37:47,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400945202] [2020-07-20 21:37:47,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:37:47,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:37:47,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:37:47,192 INFO L87 Difference]: Start difference. First operand 150 states and 286 transitions. Second operand 17 states. [2020-07-20 21:37:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:47,471 INFO L93 Difference]: Finished difference Result 202 states and 428 transitions. [2020-07-20 21:37:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:47,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 460 [2020-07-20 21:37:47,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:47,476 INFO L225 Difference]: With dead ends: 202 [2020-07-20 21:37:47,476 INFO L226 Difference]: Without dead ends: 193 [2020-07-20 21:37:47,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 925 GetRequests, 891 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:37:47,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-07-20 21:37:47,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 145. [2020-07-20 21:37:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-20 21:37:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 270 transitions. [2020-07-20 21:37:47,493 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 270 transitions. Word has length 460 [2020-07-20 21:37:47,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:47,493 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 270 transitions. [2020-07-20 21:37:47,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:37:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 270 transitions. [2020-07-20 21:37:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:37:47,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:47,498 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:47,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:47,712 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:47,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash -922529467, now seen corresponding path program 18 times [2020-07-20 21:37:47,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:47,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573601868] [2020-07-20 21:37:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:48,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:48,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:48,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:37:48,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 605 proven. 576 refuted. 0 times theorem prover too weak. 5233 trivial. 0 not checked. [2020-07-20 21:37:48,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:50,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:50,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:50,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:51,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:51,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:51,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:51,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:51,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:51,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:51,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:51,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:51,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 605 proven. 606 refuted. 0 times theorem prover too weak. 5203 trivial. 0 not checked. [2020-07-20 21:37:52,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573601868] [2020-07-20 21:37:52,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:52,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 21:37:52,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674253433] [2020-07-20 21:37:52,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:37:52,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:52,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:37:52,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:37:52,135 INFO L87 Difference]: Start difference. First operand 145 states and 270 transitions. Second operand 20 states. [2020-07-20 21:37:52,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:52,645 INFO L93 Difference]: Finished difference Result 265 states and 667 transitions. [2020-07-20 21:37:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:37:52,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 475 [2020-07-20 21:37:52,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:52,650 INFO L225 Difference]: With dead ends: 265 [2020-07-20 21:37:52,650 INFO L226 Difference]: Without dead ends: 247 [2020-07-20 21:37:52,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 917 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:37:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-07-20 21:37:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 209. [2020-07-20 21:37:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-07-20 21:37:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 451 transitions. [2020-07-20 21:37:52,674 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 451 transitions. Word has length 475 [2020-07-20 21:37:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:52,675 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 451 transitions. [2020-07-20 21:37:52,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:37:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 451 transitions. [2020-07-20 21:37:52,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2020-07-20 21:37:52,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:52,681 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:52,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:52,896 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:52,896 INFO L82 PathProgramCache]: Analyzing trace with hash 517070623, now seen corresponding path program 19 times [2020-07-20 21:37:52,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:52,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149540955] [2020-07-20 21:37:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:53,384 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:53,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:53,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:37:53,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 247 proven. 811 refuted. 0 times theorem prover too weak. 4093 trivial. 0 not checked. [2020-07-20 21:37:53,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:55,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:55,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:56,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:56,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:56,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:56,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:56,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:56,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:56,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:56,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:56,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:56,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 255 proven. 827 refuted. 0 times theorem prover too weak. 4069 trivial. 0 not checked. [2020-07-20 21:37:57,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149540955] [2020-07-20 21:37:57,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:57,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:37:57,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924877362] [2020-07-20 21:37:57,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:37:57,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:57,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:37:57,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:37:57,058 INFO L87 Difference]: Start difference. First operand 209 states and 451 transitions. Second operand 19 states. [2020-07-20 21:37:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:57,512 INFO L93 Difference]: Finished difference Result 484 states and 1571 transitions. [2020-07-20 21:37:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:37:57,513 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 427 [2020-07-20 21:37:57,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:57,518 INFO L225 Difference]: With dead ends: 484 [2020-07-20 21:37:57,518 INFO L226 Difference]: Without dead ends: 251 [2020-07-20 21:37:57,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 821 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:37:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-20 21:37:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 206. [2020-07-20 21:37:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 21:37:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 425 transitions. [2020-07-20 21:37:57,551 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 425 transitions. Word has length 427 [2020-07-20 21:37:57,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:57,551 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 425 transitions. [2020-07-20 21:37:57,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:37:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 425 transitions. [2020-07-20 21:37:57,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-20 21:37:57,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:57,558 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:57,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:57,771 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:57,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:57,772 INFO L82 PathProgramCache]: Analyzing trace with hash 83790938, now seen corresponding path program 20 times [2020-07-20 21:37:57,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:57,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933758324] [2020-07-20 21:37:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:58,272 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:58,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:58,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:37:58,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 302 proven. 777 refuted. 0 times theorem prover too weak. 4298 trivial. 0 not checked. [2020-07-20 21:37:58,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:00,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:00,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:01,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:01,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:01,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:01,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:01,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:01,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:01,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:01,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:01,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 306 proven. 799 refuted. 0 times theorem prover too weak. 4272 trivial. 0 not checked. [2020-07-20 21:38:02,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933758324] [2020-07-20 21:38:02,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:02,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:38:02,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434483027] [2020-07-20 21:38:02,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:38:02,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:02,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:38:02,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:38:02,078 INFO L87 Difference]: Start difference. First operand 206 states and 425 transitions. Second operand 19 states. [2020-07-20 21:38:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:02,536 INFO L93 Difference]: Finished difference Result 273 states and 591 transitions. [2020-07-20 21:38:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:38:02,537 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 436 [2020-07-20 21:38:02,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:02,540 INFO L225 Difference]: With dead ends: 273 [2020-07-20 21:38:02,540 INFO L226 Difference]: Without dead ends: 180 [2020-07-20 21:38:02,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 839 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:38:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-07-20 21:38:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 140. [2020-07-20 21:38:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-20 21:38:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 253 transitions. [2020-07-20 21:38:02,557 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 253 transitions. Word has length 436 [2020-07-20 21:38:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:02,558 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 253 transitions. [2020-07-20 21:38:02,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:38:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 253 transitions. [2020-07-20 21:38:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 21:38:02,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:02,562 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 29, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:02,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:02,777 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:02,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1423742742, now seen corresponding path program 21 times [2020-07-20 21:38:02,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:02,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051253465] [2020-07-20 21:38:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:03,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:03,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:03,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:38:03,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6821 backedges. 461 proven. 926 refuted. 0 times theorem prover too weak. 5434 trivial. 0 not checked. [2020-07-20 21:38:03,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:05,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:07,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:07,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:07,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:07,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:07,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:08,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:08,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:08,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:08,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:08,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6821 backedges. 463 proven. 957 refuted. 0 times theorem prover too weak. 5401 trivial. 0 not checked. [2020-07-20 21:38:08,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051253465] [2020-07-20 21:38:08,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:08,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:38:08,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466346343] [2020-07-20 21:38:08,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:38:08,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:08,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:38:08,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:38:08,450 INFO L87 Difference]: Start difference. First operand 140 states and 253 transitions. Second operand 21 states. [2020-07-20 21:38:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:08,915 INFO L93 Difference]: Finished difference Result 209 states and 425 transitions. [2020-07-20 21:38:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:38:08,917 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 489 [2020-07-20 21:38:08,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:08,920 INFO L225 Difference]: With dead ends: 209 [2020-07-20 21:38:08,920 INFO L226 Difference]: Without dead ends: 178 [2020-07-20 21:38:08,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 941 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:38:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-20 21:38:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2020-07-20 21:38:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-20 21:38:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 312 transitions. [2020-07-20 21:38:08,938 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 312 transitions. Word has length 489 [2020-07-20 21:38:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:08,938 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 312 transitions. [2020-07-20 21:38:08,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:38:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 312 transitions. [2020-07-20 21:38:08,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-07-20 21:38:08,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:08,943 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 24, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:09,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:09,156 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:09,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:09,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1972741960, now seen corresponding path program 22 times [2020-07-20 21:38:09,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:09,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647337248] [2020-07-20 21:38:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:09,690 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:09,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:09,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:38:09,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 560 proven. 439 refuted. 0 times theorem prover too weak. 3686 trivial. 0 not checked. [2020-07-20 21:38:09,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:11,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:11,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:12,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:12,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:12,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:12,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:12,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:12,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:12,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:12,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:13,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 560 proven. 465 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2020-07-20 21:38:13,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647337248] [2020-07-20 21:38:13,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:13,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:38:13,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717833088] [2020-07-20 21:38:13,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:38:13,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:13,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:38:13,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:38:13,415 INFO L87 Difference]: Start difference. First operand 160 states and 312 transitions. Second operand 19 states. [2020-07-20 21:38:13,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:13,877 INFO L93 Difference]: Finished difference Result 221 states and 475 transitions. [2020-07-20 21:38:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:38:13,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 408 [2020-07-20 21:38:13,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:13,882 INFO L225 Difference]: With dead ends: 221 [2020-07-20 21:38:13,882 INFO L226 Difference]: Without dead ends: 203 [2020-07-20 21:38:13,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 783 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:38:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-20 21:38:13,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 180. [2020-07-20 21:38:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-20 21:38:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 358 transitions. [2020-07-20 21:38:13,902 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 358 transitions. Word has length 408 [2020-07-20 21:38:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:13,902 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 358 transitions. [2020-07-20 21:38:13,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:38:13,903 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 358 transitions. [2020-07-20 21:38:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-07-20 21:38:13,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:13,908 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 24, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 9, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:14,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:14,121 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:14,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1262016314, now seen corresponding path program 23 times [2020-07-20 21:38:14,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:14,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430828517] [2020-07-20 21:38:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:14,674 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:14,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:14,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:38:14,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 388 proven. 338 refuted. 0 times theorem prover too weak. 3959 trivial. 0 not checked. [2020-07-20 21:38:14,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:16,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:16,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:16,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:16,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:16,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:16,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:16,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 390 proven. 346 refuted. 0 times theorem prover too weak. 3949 trivial. 0 not checked. [2020-07-20 21:38:17,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430828517] [2020-07-20 21:38:17,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:17,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:38:17,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647493009] [2020-07-20 21:38:17,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:38:17,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:17,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:38:17,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:38:17,092 INFO L87 Difference]: Start difference. First operand 180 states and 358 transitions. Second operand 15 states. [2020-07-20 21:38:17,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:17,365 INFO L93 Difference]: Finished difference Result 283 states and 701 transitions. [2020-07-20 21:38:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:38:17,367 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 408 [2020-07-20 21:38:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:17,371 INFO L225 Difference]: With dead ends: 283 [2020-07-20 21:38:17,371 INFO L226 Difference]: Without dead ends: 274 [2020-07-20 21:38:17,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 791 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:38:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-20 21:38:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 193. [2020-07-20 21:38:17,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-20 21:38:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 415 transitions. [2020-07-20 21:38:17,397 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 415 transitions. Word has length 408 [2020-07-20 21:38:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:17,398 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 415 transitions. [2020-07-20 21:38:17,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:38:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 415 transitions. [2020-07-20 21:38:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 21:38:17,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:17,404 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 27, 25, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 11, 11, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:17,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:17,620 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash 312235080, now seen corresponding path program 24 times [2020-07-20 21:38:17,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:17,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315270009] [2020-07-20 21:38:17,622 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:18,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:18,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:18,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:38:18,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6739 backedges. 483 proven. 546 refuted. 0 times theorem prover too weak. 5710 trivial. 0 not checked. [2020-07-20 21:38:18,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:20,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:20,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:20,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:20,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:20,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:20,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:21,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6739 backedges. 487 proven. 556 refuted. 0 times theorem prover too weak. 5696 trivial. 0 not checked. [2020-07-20 21:38:21,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315270009] [2020-07-20 21:38:21,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:21,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:38:21,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515037925] [2020-07-20 21:38:21,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:38:21,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:21,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:38:21,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:38:21,562 INFO L87 Difference]: Start difference. First operand 193 states and 415 transitions. Second operand 17 states. [2020-07-20 21:38:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:21,869 INFO L93 Difference]: Finished difference Result 232 states and 505 transitions. [2020-07-20 21:38:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:38:21,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 485 [2020-07-20 21:38:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:21,874 INFO L225 Difference]: With dead ends: 232 [2020-07-20 21:38:21,874 INFO L226 Difference]: Without dead ends: 223 [2020-07-20 21:38:21,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 975 GetRequests, 941 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:38:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-20 21:38:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2020-07-20 21:38:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-20 21:38:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 361 transitions. [2020-07-20 21:38:21,897 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 361 transitions. Word has length 485 [2020-07-20 21:38:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:21,897 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 361 transitions. [2020-07-20 21:38:21,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:38:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 361 transitions. [2020-07-20 21:38:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-20 21:38:21,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:21,903 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:22,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:22,117 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:22,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1468035909, now seen corresponding path program 25 times [2020-07-20 21:38:22,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:22,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38219802] [2020-07-20 21:38:22,119 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:22,695 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:22,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:22,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:38:22,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5706 backedges. 620 proven. 494 refuted. 0 times theorem prover too weak. 4592 trivial. 0 not checked. [2020-07-20 21:38:22,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:24,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:24,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:25,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:25,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:25,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:25,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:25,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:25,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:26,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:26,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5706 backedges. 622 proven. 516 refuted. 0 times theorem prover too weak. 4568 trivial. 0 not checked. [2020-07-20 21:38:26,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38219802] [2020-07-20 21:38:26,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:26,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:38:26,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74778240] [2020-07-20 21:38:26,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:38:26,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:26,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:38:26,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:38:26,639 INFO L87 Difference]: Start difference. First operand 180 states and 361 transitions. Second operand 19 states. [2020-07-20 21:38:27,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:27,067 INFO L93 Difference]: Finished difference Result 220 states and 452 transitions. [2020-07-20 21:38:27,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:38:27,068 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 449 [2020-07-20 21:38:27,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:27,071 INFO L225 Difference]: With dead ends: 220 [2020-07-20 21:38:27,072 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 21:38:27,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 865 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:38:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 21:38:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 190. [2020-07-20 21:38:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-20 21:38:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 390 transitions. [2020-07-20 21:38:27,092 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 390 transitions. Word has length 449 [2020-07-20 21:38:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:27,093 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 390 transitions. [2020-07-20 21:38:27,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:38:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 390 transitions. [2020-07-20 21:38:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-07-20 21:38:27,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:27,100 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 34, 33, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 14, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:27,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:27,313 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:27,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2122481566, now seen corresponding path program 26 times [2020-07-20 21:38:27,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:27,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142353242] [2020-07-20 21:38:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:27,936 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:27,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:27,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:38:27,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1038 proven. 625 refuted. 0 times theorem prover too weak. 7750 trivial. 0 not checked. [2020-07-20 21:38:28,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:30,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:30,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:31,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:31,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:31,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:31,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:32,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:32,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:32,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:32,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:32,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:32,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1038 proven. 658 refuted. 0 times theorem prover too weak. 7717 trivial. 0 not checked. [2020-07-20 21:38:33,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142353242] [2020-07-20 21:38:33,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:33,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:38:33,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943792265] [2020-07-20 21:38:33,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:38:33,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:33,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:38:33,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:38:33,583 INFO L87 Difference]: Start difference. First operand 190 states and 390 transitions. Second operand 21 states. [2020-07-20 21:38:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:34,130 INFO L93 Difference]: Finished difference Result 276 states and 616 transitions. [2020-07-20 21:38:34,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:38:34,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 572 [2020-07-20 21:38:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:34,135 INFO L225 Difference]: With dead ends: 276 [2020-07-20 21:38:34,135 INFO L226 Difference]: Without dead ends: 255 [2020-07-20 21:38:34,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1151 GetRequests, 1107 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:38:34,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-20 21:38:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 220. [2020-07-20 21:38:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-20 21:38:34,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 435 transitions. [2020-07-20 21:38:34,163 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 435 transitions. Word has length 572 [2020-07-20 21:38:34,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:34,163 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 435 transitions. [2020-07-20 21:38:34,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:38:34,163 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 435 transitions. [2020-07-20 21:38:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-07-20 21:38:34,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:34,171 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 29, 25, 23, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 11, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:34,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:34,386 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:34,387 INFO L82 PathProgramCache]: Analyzing trace with hash -283414203, now seen corresponding path program 27 times [2020-07-20 21:38:34,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:34,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969422781] [2020-07-20 21:38:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:35,000 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:35,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:35,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:38:35,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5005 backedges. 608 proven. 563 refuted. 0 times theorem prover too weak. 3834 trivial. 0 not checked. [2020-07-20 21:38:35,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:37,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:37,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:38,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:38,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:38,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:39,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5005 backedges. 614 proven. 590 refuted. 0 times theorem prover too weak. 3801 trivial. 0 not checked. [2020-07-20 21:38:40,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969422781] [2020-07-20 21:38:40,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:40,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-20 21:38:40,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144990620] [2020-07-20 21:38:40,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:38:40,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:40,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:38:40,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:38:40,103 INFO L87 Difference]: Start difference. First operand 220 states and 435 transitions. Second operand 22 states. [2020-07-20 21:38:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:40,625 INFO L93 Difference]: Finished difference Result 410 states and 913 transitions. [2020-07-20 21:38:40,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:38:40,626 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 421 [2020-07-20 21:38:40,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:40,633 INFO L225 Difference]: With dead ends: 410 [2020-07-20 21:38:40,633 INFO L226 Difference]: Without dead ends: 395 [2020-07-20 21:38:40,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 805 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:38:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-07-20 21:38:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 261. [2020-07-20 21:38:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-07-20 21:38:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 590 transitions. [2020-07-20 21:38:40,666 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 590 transitions. Word has length 421 [2020-07-20 21:38:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:40,666 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 590 transitions. [2020-07-20 21:38:40,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:38:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 590 transitions. [2020-07-20 21:38:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-07-20 21:38:40,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:40,672 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 26, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 12, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:40,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:40,873 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:40,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:40,874 INFO L82 PathProgramCache]: Analyzing trace with hash 318912856, now seen corresponding path program 28 times [2020-07-20 21:38:40,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:40,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106097587] [2020-07-20 21:38:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:41,545 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:41,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:41,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:38:41,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4726 backedges. 330 proven. 538 refuted. 0 times theorem prover too weak. 3858 trivial. 0 not checked. [2020-07-20 21:38:41,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:43,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:43,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:44,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:44,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:44,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:44,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:44,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:44,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4726 backedges. 336 proven. 550 refuted. 0 times theorem prover too weak. 3840 trivial. 0 not checked. [2020-07-20 21:38:44,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106097587] [2020-07-20 21:38:44,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:44,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:38:44,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895012964] [2020-07-20 21:38:44,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:38:44,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:44,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:38:44,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:38:44,593 INFO L87 Difference]: Start difference. First operand 261 states and 590 transitions. Second operand 17 states. [2020-07-20 21:38:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:45,033 INFO L93 Difference]: Finished difference Result 342 states and 823 transitions. [2020-07-20 21:38:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:38:45,034 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 410 [2020-07-20 21:38:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:45,039 INFO L225 Difference]: With dead ends: 342 [2020-07-20 21:38:45,039 INFO L226 Difference]: Without dead ends: 305 [2020-07-20 21:38:45,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 791 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:38:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-07-20 21:38:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 267. [2020-07-20 21:38:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-07-20 21:38:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 589 transitions. [2020-07-20 21:38:45,069 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 589 transitions. Word has length 410 [2020-07-20 21:38:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:45,069 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 589 transitions. [2020-07-20 21:38:45,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:38:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 589 transitions. [2020-07-20 21:38:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-07-20 21:38:45,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:45,078 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 24, 23, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:45,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:45,292 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:45,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:45,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1269996853, now seen corresponding path program 29 times [2020-07-20 21:38:45,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:45,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536111079] [2020-07-20 21:38:45,292 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:45,935 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:38:45,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:45,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:38:45,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4393 backedges. 655 proven. 179 refuted. 0 times theorem prover too weak. 3559 trivial. 0 not checked. [2020-07-20 21:38:46,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:47,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:47,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:47,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:47,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:48,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:48,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:48,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4393 backedges. 659 proven. 191 refuted. 0 times theorem prover too weak. 3543 trivial. 0 not checked. [2020-07-20 21:38:48,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536111079] [2020-07-20 21:38:48,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:48,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:38:48,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014868014] [2020-07-20 21:38:48,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:38:48,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:48,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:38:48,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:38:48,945 INFO L87 Difference]: Start difference. First operand 267 states and 589 transitions. Second operand 17 states. [2020-07-20 21:38:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:49,323 INFO L93 Difference]: Finished difference Result 390 states and 1099 transitions. [2020-07-20 21:38:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:38:49,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 396 [2020-07-20 21:38:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:49,331 INFO L225 Difference]: With dead ends: 390 [2020-07-20 21:38:49,331 INFO L226 Difference]: Without dead ends: 375 [2020-07-20 21:38:49,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 763 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:38:49,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-07-20 21:38:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 308. [2020-07-20 21:38:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-07-20 21:38:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 794 transitions. [2020-07-20 21:38:49,376 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 794 transitions. Word has length 396 [2020-07-20 21:38:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:49,376 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 794 transitions. [2020-07-20 21:38:49,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:38:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 794 transitions. [2020-07-20 21:38:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-07-20 21:38:49,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:49,388 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 32, 32, 27, 23, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:49,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:49,603 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:49,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:49,604 INFO L82 PathProgramCache]: Analyzing trace with hash 436003652, now seen corresponding path program 30 times [2020-07-20 21:38:49,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:49,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470673608] [2020-07-20 21:38:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:50,272 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:50,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:50,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:38:50,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5992 backedges. 658 proven. 629 refuted. 0 times theorem prover too weak. 4705 trivial. 0 not checked. [2020-07-20 21:38:50,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:53,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:53,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:53,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:53,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:54,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5992 backedges. 658 proven. 662 refuted. 0 times theorem prover too weak. 4672 trivial. 0 not checked. [2020-07-20 21:38:55,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470673608] [2020-07-20 21:38:55,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:55,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:38:55,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623538261] [2020-07-20 21:38:55,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:38:55,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:55,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:38:55,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:38:55,697 INFO L87 Difference]: Start difference. First operand 308 states and 794 transitions. Second operand 21 states. [2020-07-20 21:38:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:38:56,236 INFO L93 Difference]: Finished difference Result 342 states and 839 transitions. [2020-07-20 21:38:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:38:56,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 459 [2020-07-20 21:38:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:38:56,244 INFO L225 Difference]: With dead ends: 342 [2020-07-20 21:38:56,244 INFO L226 Difference]: Without dead ends: 327 [2020-07-20 21:38:56,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 925 GetRequests, 881 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:38:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-07-20 21:38:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 226. [2020-07-20 21:38:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-07-20 21:38:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 493 transitions. [2020-07-20 21:38:56,271 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 493 transitions. Word has length 459 [2020-07-20 21:38:56,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:38:56,272 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 493 transitions. [2020-07-20 21:38:56,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:38:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 493 transitions. [2020-07-20 21:38:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-20 21:38:56,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:38:56,277 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 24, 23, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:38:56,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:56,492 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:38:56,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:38:56,492 INFO L82 PathProgramCache]: Analyzing trace with hash 792393915, now seen corresponding path program 31 times [2020-07-20 21:38:56,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:38:56,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458771391] [2020-07-20 21:38:56,492 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:38:57,171 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:38:57,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:38:57,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:38:57,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:38:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4969 backedges. 390 proven. 336 refuted. 0 times theorem prover too weak. 4243 trivial. 0 not checked. [2020-07-20 21:38:57,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:38:58,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:58,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:58,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:58,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:59,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:59,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:59,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:59,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:59,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:59,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:59,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4969 backedges. 390 proven. 346 refuted. 0 times theorem prover too weak. 4233 trivial. 0 not checked. [2020-07-20 21:38:59,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458771391] [2020-07-20 21:38:59,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:38:59,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:38:59,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209397119] [2020-07-20 21:38:59,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:38:59,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:38:59,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:38:59,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:38:59,871 INFO L87 Difference]: Start difference. First operand 226 states and 493 transitions. Second operand 15 states. [2020-07-20 21:39:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:00,185 INFO L93 Difference]: Finished difference Result 268 states and 580 transitions. [2020-07-20 21:39:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:39:00,187 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 420 [2020-07-20 21:39:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:00,191 INFO L225 Difference]: With dead ends: 268 [2020-07-20 21:39:00,191 INFO L226 Difference]: Without dead ends: 256 [2020-07-20 21:39:00,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 815 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:39:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-07-20 21:39:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 223. [2020-07-20 21:39:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-20 21:39:00,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 483 transitions. [2020-07-20 21:39:00,220 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 483 transitions. Word has length 420 [2020-07-20 21:39:00,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:00,221 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 483 transitions. [2020-07-20 21:39:00,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:39:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 483 transitions. [2020-07-20 21:39:00,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-07-20 21:39:00,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:00,226 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 24, 23, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:00,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:00,440 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash 316008850, now seen corresponding path program 32 times [2020-07-20 21:39:00,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:00,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994858745] [2020-07-20 21:39:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:01,135 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:01,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:01,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:39:01,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5281 backedges. 557 proven. 413 refuted. 0 times theorem prover too weak. 4311 trivial. 0 not checked. [2020-07-20 21:39:01,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:03,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:03,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:03,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:04,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:04,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:04,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:04,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:04,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:04,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:04,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5281 backedges. 557 proven. 427 refuted. 0 times theorem prover too weak. 4297 trivial. 0 not checked. [2020-07-20 21:39:05,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994858745] [2020-07-20 21:39:05,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:05,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:39:05,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092926378] [2020-07-20 21:39:05,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:05,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:05,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:05,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:05,043 INFO L87 Difference]: Start difference. First operand 223 states and 483 transitions. Second operand 19 states. [2020-07-20 21:39:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:05,458 INFO L93 Difference]: Finished difference Result 261 states and 560 transitions. [2020-07-20 21:39:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:05,459 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 432 [2020-07-20 21:39:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:05,462 INFO L225 Difference]: With dead ends: 261 [2020-07-20 21:39:05,462 INFO L226 Difference]: Without dead ends: 243 [2020-07-20 21:39:05,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 833 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:39:05,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-20 21:39:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 216. [2020-07-20 21:39:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-20 21:39:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 447 transitions. [2020-07-20 21:39:05,478 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 447 transitions. Word has length 432 [2020-07-20 21:39:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:05,478 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 447 transitions. [2020-07-20 21:39:05,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:05,478 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 447 transitions. [2020-07-20 21:39:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-07-20 21:39:05,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:05,481 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 28, 28, 24, 23, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 12, 9, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:05,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:05,683 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:05,684 INFO L82 PathProgramCache]: Analyzing trace with hash 222912732, now seen corresponding path program 33 times [2020-07-20 21:39:05,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:05,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740899408] [2020-07-20 21:39:05,685 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:06,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:06,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:06,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:39:06,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 506 proven. 404 refuted. 0 times theorem prover too weak. 4419 trivial. 0 not checked. [2020-07-20 21:39:06,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:08,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:08,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:08,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:08,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:08,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:09,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:09,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:09,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:09,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:09,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 510 proven. 418 refuted. 0 times theorem prover too weak. 4401 trivial. 0 not checked. [2020-07-20 21:39:09,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740899408] [2020-07-20 21:39:09,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:09,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:39:09,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186145961] [2020-07-20 21:39:09,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:39:09,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:09,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:39:09,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:39:09,891 INFO L87 Difference]: Start difference. First operand 216 states and 447 transitions. Second operand 17 states. [2020-07-20 21:39:10,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:10,276 INFO L93 Difference]: Finished difference Result 301 states and 682 transitions. [2020-07-20 21:39:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:39:10,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 432 [2020-07-20 21:39:10,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:10,282 INFO L225 Difference]: With dead ends: 301 [2020-07-20 21:39:10,282 INFO L226 Difference]: Without dead ends: 283 [2020-07-20 21:39:10,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 835 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:39:10,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-20 21:39:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 195. [2020-07-20 21:39:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-07-20 21:39:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 396 transitions. [2020-07-20 21:39:10,305 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 396 transitions. Word has length 432 [2020-07-20 21:39:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:10,306 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 396 transitions. [2020-07-20 21:39:10,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:39:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 396 transitions. [2020-07-20 21:39:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-20 21:39:10,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:10,311 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 32, 32, 25, 25, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:10,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:10,526 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:10,527 INFO L82 PathProgramCache]: Analyzing trace with hash 635918709, now seen corresponding path program 34 times [2020-07-20 21:39:10,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:10,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867136749] [2020-07-20 21:39:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:11,249 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:11,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:11,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:39:11,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6340 backedges. 380 proven. 689 refuted. 0 times theorem prover too weak. 5271 trivial. 0 not checked. [2020-07-20 21:39:11,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:13,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:13,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:14,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:14,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:14,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:14,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:14,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:14,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:14,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:14,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:14,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:15,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6340 backedges. 382 proven. 701 refuted. 0 times theorem prover too weak. 5257 trivial. 0 not checked. [2020-07-20 21:39:15,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867136749] [2020-07-20 21:39:15,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:15,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:39:15,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733227987] [2020-07-20 21:39:15,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:15,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:15,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:15,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:15,274 INFO L87 Difference]: Start difference. First operand 195 states and 396 transitions. Second operand 19 states. [2020-07-20 21:39:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:15,654 INFO L93 Difference]: Finished difference Result 238 states and 463 transitions. [2020-07-20 21:39:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:15,655 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 471 [2020-07-20 21:39:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:15,659 INFO L225 Difference]: With dead ends: 238 [2020-07-20 21:39:15,659 INFO L226 Difference]: Without dead ends: 213 [2020-07-20 21:39:15,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 947 GetRequests, 911 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:39:15,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-07-20 21:39:15,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2020-07-20 21:39:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-20 21:39:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 408 transitions. [2020-07-20 21:39:15,677 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 408 transitions. Word has length 471 [2020-07-20 21:39:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:15,678 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 408 transitions. [2020-07-20 21:39:15,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 408 transitions. [2020-07-20 21:39:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-20 21:39:15,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:15,682 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:15,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:15,896 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:15,897 INFO L82 PathProgramCache]: Analyzing trace with hash 507764589, now seen corresponding path program 35 times [2020-07-20 21:39:15,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:15,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032997856] [2020-07-20 21:39:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:16,625 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:39:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:16,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:39:16,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 767 proven. 253 refuted. 0 times theorem prover too weak. 3996 trivial. 0 not checked. [2020-07-20 21:39:16,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:18,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:18,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:19,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:19,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:19,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:19,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:19,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:19,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:19,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:20,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 771 proven. 270 refuted. 0 times theorem prover too weak. 3975 trivial. 0 not checked. [2020-07-20 21:39:20,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032997856] [2020-07-20 21:39:20,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:20,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:39:20,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344639670] [2020-07-20 21:39:20,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:20,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:20,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:20,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:20,980 INFO L87 Difference]: Start difference. First operand 207 states and 408 transitions. Second operand 19 states. [2020-07-20 21:39:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:21,391 INFO L93 Difference]: Finished difference Result 287 states and 603 transitions. [2020-07-20 21:39:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:21,393 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 422 [2020-07-20 21:39:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:21,398 INFO L225 Difference]: With dead ends: 287 [2020-07-20 21:39:21,398 INFO L226 Difference]: Without dead ends: 272 [2020-07-20 21:39:21,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 811 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:39:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-20 21:39:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 210. [2020-07-20 21:39:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-07-20 21:39:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 411 transitions. [2020-07-20 21:39:21,419 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 411 transitions. Word has length 422 [2020-07-20 21:39:21,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:21,420 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 411 transitions. [2020-07-20 21:39:21,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:21,420 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 411 transitions. [2020-07-20 21:39:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-07-20 21:39:21,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:21,425 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 26, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:21,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:21,640 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:21,640 INFO L82 PathProgramCache]: Analyzing trace with hash -108648413, now seen corresponding path program 36 times [2020-07-20 21:39:21,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:21,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719146203] [2020-07-20 21:39:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:22,434 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:39:22,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:22,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:39:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 665 proven. 213 refuted. 0 times theorem prover too weak. 4163 trivial. 0 not checked. [2020-07-20 21:39:22,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:23,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:23,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:24,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:24,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:24,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:24,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:24,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:24,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:24,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:24,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:24,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 667 proven. 227 refuted. 0 times theorem prover too weak. 4147 trivial. 0 not checked. [2020-07-20 21:39:25,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719146203] [2020-07-20 21:39:25,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:25,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:39:25,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160537803] [2020-07-20 21:39:25,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:39:25,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:25,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:39:25,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:39:25,807 INFO L87 Difference]: Start difference. First operand 210 states and 411 transitions. Second operand 17 states. [2020-07-20 21:39:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:26,137 INFO L93 Difference]: Finished difference Result 311 states and 660 transitions. [2020-07-20 21:39:26,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:39:26,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 423 [2020-07-20 21:39:26,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:26,143 INFO L225 Difference]: With dead ends: 311 [2020-07-20 21:39:26,143 INFO L226 Difference]: Without dead ends: 296 [2020-07-20 21:39:26,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 817 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:39:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-20 21:39:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 199. [2020-07-20 21:39:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-20 21:39:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 383 transitions. [2020-07-20 21:39:26,162 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 383 transitions. Word has length 423 [2020-07-20 21:39:26,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:26,162 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 383 transitions. [2020-07-20 21:39:26,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:39:26,162 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 383 transitions. [2020-07-20 21:39:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 21:39:26,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:26,165 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 28, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:26,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:26,366 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:26,367 INFO L82 PathProgramCache]: Analyzing trace with hash 826911826, now seen corresponding path program 37 times [2020-07-20 21:39:26,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:26,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218984384] [2020-07-20 21:39:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:27,143 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:27,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:39:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6793 backedges. 524 proven. 588 refuted. 0 times theorem prover too weak. 5681 trivial. 0 not checked. [2020-07-20 21:39:27,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:29,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:30,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6793 backedges. 522 proven. 606 refuted. 0 times theorem prover too weak. 5665 trivial. 0 not checked. [2020-07-20 21:39:31,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218984384] [2020-07-20 21:39:31,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:31,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:39:31,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12701417] [2020-07-20 21:39:31,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:31,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:31,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:31,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:31,419 INFO L87 Difference]: Start difference. First operand 199 states and 383 transitions. Second operand 19 states. [2020-07-20 21:39:31,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:31,860 INFO L93 Difference]: Finished difference Result 265 states and 550 transitions. [2020-07-20 21:39:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:31,862 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 488 [2020-07-20 21:39:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:31,867 INFO L225 Difference]: With dead ends: 265 [2020-07-20 21:39:31,867 INFO L226 Difference]: Without dead ends: 247 [2020-07-20 21:39:31,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 945 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:39:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-07-20 21:39:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 187. [2020-07-20 21:39:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-20 21:39:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 362 transitions. [2020-07-20 21:39:31,884 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 362 transitions. Word has length 488 [2020-07-20 21:39:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:31,884 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 362 transitions. [2020-07-20 21:39:31,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:31,884 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 362 transitions. [2020-07-20 21:39:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-20 21:39:31,887 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:31,887 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:32,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:32,088 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:32,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:32,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1825487371, now seen corresponding path program 38 times [2020-07-20 21:39:32,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:32,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664525140] [2020-07-20 21:39:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:32,909 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:39:32,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:32,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:39:32,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5706 backedges. 583 proven. 222 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2020-07-20 21:39:33,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:34,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:34,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:34,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:34,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:34,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:34,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:34,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:34,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:34,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:35,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5706 backedges. 585 proven. 230 refuted. 0 times theorem prover too weak. 4891 trivial. 0 not checked. [2020-07-20 21:39:35,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664525140] [2020-07-20 21:39:35,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:35,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:39:35,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983971153] [2020-07-20 21:39:35,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:39:35,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:35,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:39:35,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:39:35,849 INFO L87 Difference]: Start difference. First operand 187 states and 362 transitions. Second operand 15 states. [2020-07-20 21:39:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:36,149 INFO L93 Difference]: Finished difference Result 318 states and 774 transitions. [2020-07-20 21:39:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:39:36,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 449 [2020-07-20 21:39:36,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:36,157 INFO L225 Difference]: With dead ends: 318 [2020-07-20 21:39:36,157 INFO L226 Difference]: Without dead ends: 303 [2020-07-20 21:39:36,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 873 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:39:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-07-20 21:39:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 189. [2020-07-20 21:39:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-20 21:39:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 373 transitions. [2020-07-20 21:39:36,176 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 373 transitions. Word has length 449 [2020-07-20 21:39:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:36,176 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 373 transitions. [2020-07-20 21:39:36,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:39:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 373 transitions. [2020-07-20 21:39:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-20 21:39:36,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:36,179 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:36,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:36,380 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1517231274, now seen corresponding path program 39 times [2020-07-20 21:39:36,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:36,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376245878] [2020-07-20 21:39:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:37,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:39:37,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:37,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:39:37,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 620 proven. 208 refuted. 0 times theorem prover too weak. 5254 trivial. 0 not checked. [2020-07-20 21:39:37,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:38,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:38,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:38,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:38,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:38,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:38,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:39,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:39,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:39,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 620 proven. 220 refuted. 0 times theorem prover too weak. 5242 trivial. 0 not checked. [2020-07-20 21:39:40,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376245878] [2020-07-20 21:39:40,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:40,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:39:40,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111013808] [2020-07-20 21:39:40,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:39:40,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:40,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:39:40,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:39:40,279 INFO L87 Difference]: Start difference. First operand 189 states and 373 transitions. Second operand 15 states. [2020-07-20 21:39:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:40,577 INFO L93 Difference]: Finished difference Result 298 states and 711 transitions. [2020-07-20 21:39:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:39:40,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 463 [2020-07-20 21:39:40,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:40,584 INFO L225 Difference]: With dead ends: 298 [2020-07-20 21:39:40,584 INFO L226 Difference]: Without dead ends: 283 [2020-07-20 21:39:40,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 901 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:39:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-20 21:39:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 200. [2020-07-20 21:39:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-20 21:39:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 417 transitions. [2020-07-20 21:39:40,604 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 417 transitions. Word has length 463 [2020-07-20 21:39:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:40,604 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 417 transitions. [2020-07-20 21:39:40,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:39:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 417 transitions. [2020-07-20 21:39:40,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-20 21:39:40,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:40,607 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 25, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:40,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:40,808 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:40,809 INFO L82 PathProgramCache]: Analyzing trace with hash 774498848, now seen corresponding path program 40 times [2020-07-20 21:39:40,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:40,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555813112] [2020-07-20 21:39:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:41,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:39:41,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:41,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:39:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5320 backedges. 730 proven. 174 refuted. 0 times theorem prover too weak. 4416 trivial. 0 not checked. [2020-07-20 21:39:41,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:43,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:43,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:43,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:43,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:43,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:43,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:43,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:43,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:43,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:44,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:44,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5320 backedges. 734 proven. 186 refuted. 0 times theorem prover too weak. 4400 trivial. 0 not checked. [2020-07-20 21:39:45,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555813112] [2020-07-20 21:39:45,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:45,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:39:45,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297668957] [2020-07-20 21:39:45,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:39:45,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:39:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:39:45,264 INFO L87 Difference]: Start difference. First operand 200 states and 417 transitions. Second operand 17 states. [2020-07-20 21:39:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:45,611 INFO L93 Difference]: Finished difference Result 234 states and 491 transitions. [2020-07-20 21:39:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:39:45,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 434 [2020-07-20 21:39:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:45,619 INFO L225 Difference]: With dead ends: 234 [2020-07-20 21:39:45,620 INFO L226 Difference]: Without dead ends: 219 [2020-07-20 21:39:45,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 839 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:39:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-20 21:39:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 184. [2020-07-20 21:39:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-20 21:39:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 357 transitions. [2020-07-20 21:39:45,639 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 357 transitions. Word has length 434 [2020-07-20 21:39:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:45,639 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 357 transitions. [2020-07-20 21:39:45,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:39:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 357 transitions. [2020-07-20 21:39:45,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-20 21:39:45,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:45,644 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:45,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:45,860 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:45,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1988433848, now seen corresponding path program 41 times [2020-07-20 21:39:45,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:45,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060762176] [2020-07-20 21:39:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:46,703 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:39:46,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:46,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:39:46,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6083 backedges. 931 proven. 217 refuted. 0 times theorem prover too weak. 4935 trivial. 0 not checked. [2020-07-20 21:39:46,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:48,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:48,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:49,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:49,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:49,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:49,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:50,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:50,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:50,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:50,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:50,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:50,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:50,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:50,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6083 backedges. 931 proven. 243 refuted. 0 times theorem prover too weak. 4909 trivial. 0 not checked. [2020-07-20 21:39:51,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060762176] [2020-07-20 21:39:51,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:51,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:39:51,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832074869] [2020-07-20 21:39:51,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:51,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:51,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:51,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:51,543 INFO L87 Difference]: Start difference. First operand 184 states and 357 transitions. Second operand 19 states. [2020-07-20 21:39:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:52,010 INFO L93 Difference]: Finished difference Result 224 states and 443 transitions. [2020-07-20 21:39:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:52,010 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 463 [2020-07-20 21:39:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:52,014 INFO L225 Difference]: With dead ends: 224 [2020-07-20 21:39:52,014 INFO L226 Difference]: Without dead ends: 209 [2020-07-20 21:39:52,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 893 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:39:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-20 21:39:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 192. [2020-07-20 21:39:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-20 21:39:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 375 transitions. [2020-07-20 21:39:52,029 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 375 transitions. Word has length 463 [2020-07-20 21:39:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:52,029 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 375 transitions. [2020-07-20 21:39:52,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 375 transitions. [2020-07-20 21:39:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 21:39:52,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:52,033 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 29, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:52,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:52,234 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:52,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash -49198866, now seen corresponding path program 42 times [2020-07-20 21:39:52,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:52,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537688282] [2020-07-20 21:39:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:53,078 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:39:53,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:53,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:39:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 890 proven. 337 refuted. 0 times theorem prover too weak. 5613 trivial. 0 not checked. [2020-07-20 21:39:53,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:55,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:56,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:57,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 892 proven. 359 refuted. 0 times theorem prover too weak. 5589 trivial. 0 not checked. [2020-07-20 21:39:58,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537688282] [2020-07-20 21:39:58,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:58,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:39:58,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184810711] [2020-07-20 21:39:58,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:39:58,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:58,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:39:58,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:39:58,107 INFO L87 Difference]: Start difference. First operand 192 states and 375 transitions. Second operand 19 states. [2020-07-20 21:39:58,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:58,605 INFO L93 Difference]: Finished difference Result 244 states and 476 transitions. [2020-07-20 21:39:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:39:58,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 490 [2020-07-20 21:39:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:58,610 INFO L225 Difference]: With dead ends: 244 [2020-07-20 21:39:58,611 INFO L226 Difference]: Without dead ends: 229 [2020-07-20 21:39:58,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 947 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:39:58,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-20 21:39:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 195. [2020-07-20 21:39:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-07-20 21:39:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 387 transitions. [2020-07-20 21:39:58,632 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 387 transitions. Word has length 490 [2020-07-20 21:39:58,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:58,633 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 387 transitions. [2020-07-20 21:39:58,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:39:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 387 transitions. [2020-07-20 21:39:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 21:39:58,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:58,638 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 28, 26, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:58,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:58,850 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:58,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1234185576, now seen corresponding path program 43 times [2020-07-20 21:39:58,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:58,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84209182] [2020-07-20 21:39:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:59,750 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:39:59,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:39:59,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6759 backedges. 630 proven. 222 refuted. 0 times theorem prover too weak. 5907 trivial. 0 not checked. [2020-07-20 21:39:59,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:01,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:01,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:01,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:01,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:01,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:01,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:01,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:01,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:02,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6759 backedges. 630 proven. 232 refuted. 0 times theorem prover too weak. 5897 trivial. 0 not checked. [2020-07-20 21:40:03,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84209182] [2020-07-20 21:40:03,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:03,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:40:03,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695929544] [2020-07-20 21:40:03,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:40:03,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:03,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:40:03,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:40:03,296 INFO L87 Difference]: Start difference. First operand 195 states and 387 transitions. Second operand 15 states. [2020-07-20 21:40:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:03,619 INFO L93 Difference]: Finished difference Result 226 states and 441 transitions. [2020-07-20 21:40:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:40:03,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 487 [2020-07-20 21:40:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:03,624 INFO L225 Difference]: With dead ends: 226 [2020-07-20 21:40:03,624 INFO L226 Difference]: Without dead ends: 211 [2020-07-20 21:40:03,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 949 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:40:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-20 21:40:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 189. [2020-07-20 21:40:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-20 21:40:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 371 transitions. [2020-07-20 21:40:03,640 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 371 transitions. Word has length 487 [2020-07-20 21:40:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:03,640 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 371 transitions. [2020-07-20 21:40:03,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:40:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 371 transitions. [2020-07-20 21:40:03,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-20 21:40:03,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:03,645 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:03,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:03,855 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:03,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2919644, now seen corresponding path program 44 times [2020-07-20 21:40:03,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:03,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753127758] [2020-07-20 21:40:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:04,784 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:04,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:04,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:40:04,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 691 proven. 218 refuted. 0 times theorem prover too weak. 4435 trivial. 0 not checked. [2020-07-20 21:40:04,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:06,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:06,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:06,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:07,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 695 proven. 228 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2020-07-20 21:40:08,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753127758] [2020-07-20 21:40:08,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:08,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:40:08,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686621153] [2020-07-20 21:40:08,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:40:08,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:08,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:40:08,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:40:08,840 INFO L87 Difference]: Start difference. First operand 189 states and 371 transitions. Second operand 17 states. [2020-07-20 21:40:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:09,226 INFO L93 Difference]: Finished difference Result 254 states and 506 transitions. [2020-07-20 21:40:09,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:40:09,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 435 [2020-07-20 21:40:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:09,231 INFO L225 Difference]: With dead ends: 254 [2020-07-20 21:40:09,231 INFO L226 Difference]: Without dead ends: 239 [2020-07-20 21:40:09,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 841 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:40:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-20 21:40:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 176. [2020-07-20 21:40:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-20 21:40:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 329 transitions. [2020-07-20 21:40:09,250 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 329 transitions. Word has length 435 [2020-07-20 21:40:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:09,251 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 329 transitions. [2020-07-20 21:40:09,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:40:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 329 transitions. [2020-07-20 21:40:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-07-20 21:40:09,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:09,254 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 29, 25, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 14, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:09,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:09,455 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:09,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:09,456 INFO L82 PathProgramCache]: Analyzing trace with hash 2145084733, now seen corresponding path program 45 times [2020-07-20 21:40:09,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:09,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179571263] [2020-07-20 21:40:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:10,326 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:10,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:40:10,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5774 backedges. 735 proven. 234 refuted. 0 times theorem prover too weak. 4805 trivial. 0 not checked. [2020-07-20 21:40:10,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:12,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:12,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:13,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5774 backedges. 739 proven. 248 refuted. 0 times theorem prover too weak. 4787 trivial. 0 not checked. [2020-07-20 21:40:14,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179571263] [2020-07-20 21:40:14,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:14,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:40:14,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823736537] [2020-07-20 21:40:14,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:40:14,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:14,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:40:14,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:40:14,345 INFO L87 Difference]: Start difference. First operand 176 states and 329 transitions. Second operand 17 states. [2020-07-20 21:40:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:14,709 INFO L93 Difference]: Finished difference Result 237 states and 445 transitions. [2020-07-20 21:40:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:40:14,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 451 [2020-07-20 21:40:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:14,714 INFO L225 Difference]: With dead ends: 237 [2020-07-20 21:40:14,714 INFO L226 Difference]: Without dead ends: 222 [2020-07-20 21:40:14,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 873 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:40:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-20 21:40:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 179. [2020-07-20 21:40:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-07-20 21:40:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 341 transitions. [2020-07-20 21:40:14,729 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 341 transitions. Word has length 451 [2020-07-20 21:40:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:14,730 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 341 transitions. [2020-07-20 21:40:14,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:40:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 341 transitions. [2020-07-20 21:40:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 21:40:14,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:14,733 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 29, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:14,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:14,934 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:14,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1138655938, now seen corresponding path program 46 times [2020-07-20 21:40:14,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:14,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233341488] [2020-07-20 21:40:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:15,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:40:15,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:15,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:40:15,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 805 proven. 312 refuted. 0 times theorem prover too weak. 5696 trivial. 0 not checked. [2020-07-20 21:40:16,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:17,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:17,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:18,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:18,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:18,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:19,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:19,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:19,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:19,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:19,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 805 proven. 326 refuted. 0 times theorem prover too weak. 5682 trivial. 0 not checked. [2020-07-20 21:40:20,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233341488] [2020-07-20 21:40:20,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:20,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:40:20,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34414339] [2020-07-20 21:40:20,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:40:20,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:20,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:40:20,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:40:20,639 INFO L87 Difference]: Start difference. First operand 179 states and 341 transitions. Second operand 19 states. [2020-07-20 21:40:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:21,097 INFO L93 Difference]: Finished difference Result 223 states and 414 transitions. [2020-07-20 21:40:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:40:21,098 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 489 [2020-07-20 21:40:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:21,101 INFO L225 Difference]: With dead ends: 223 [2020-07-20 21:40:21,101 INFO L226 Difference]: Without dead ends: 208 [2020-07-20 21:40:21,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 947 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:40:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-20 21:40:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 171. [2020-07-20 21:40:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-20 21:40:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 318 transitions. [2020-07-20 21:40:21,116 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 318 transitions. Word has length 489 [2020-07-20 21:40:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:21,116 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 318 transitions. [2020-07-20 21:40:21,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:40:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 318 transitions. [2020-07-20 21:40:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 21:40:21,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:21,120 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:21,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:21,321 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:21,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:21,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1638954211, now seen corresponding path program 47 times [2020-07-20 21:40:21,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:21,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660639895] [2020-07-20 21:40:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:22,218 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:22,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:22,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:40:22,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1049 proven. 215 refuted. 0 times theorem prover too weak. 5997 trivial. 0 not checked. [2020-07-20 21:40:22,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:24,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:24,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:25,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:25,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:25,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:25,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:25,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:25,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:25,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:25,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:26,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:26,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:26,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1049 proven. 239 refuted. 0 times theorem prover too weak. 5973 trivial. 0 not checked. [2020-07-20 21:40:27,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660639895] [2020-07-20 21:40:27,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:27,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:40:27,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346019870] [2020-07-20 21:40:27,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:40:27,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:27,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:40:27,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:40:27,715 INFO L87 Difference]: Start difference. First operand 171 states and 318 transitions. Second operand 19 states. [2020-07-20 21:40:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:28,265 INFO L93 Difference]: Finished difference Result 218 states and 409 transitions. [2020-07-20 21:40:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:40:28,266 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 504 [2020-07-20 21:40:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:28,271 INFO L225 Difference]: With dead ends: 218 [2020-07-20 21:40:28,271 INFO L226 Difference]: Without dead ends: 205 [2020-07-20 21:40:28,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 975 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:40:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-20 21:40:28,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2020-07-20 21:40:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-20 21:40:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 306 transitions. [2020-07-20 21:40:28,286 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 306 transitions. Word has length 504 [2020-07-20 21:40:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:28,287 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 306 transitions. [2020-07-20 21:40:28,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:40:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 306 transitions. [2020-07-20 21:40:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:40:28,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:28,292 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 26, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:28,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:28,506 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash -647348661, now seen corresponding path program 48 times [2020-07-20 21:40:28,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:28,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139897225] [2020-07-20 21:40:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:29,410 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:29,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:29,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:40:29,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6427 backedges. 825 proven. 179 refuted. 0 times theorem prover too weak. 5423 trivial. 0 not checked. [2020-07-20 21:40:29,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:31,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:31,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:31,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:31,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:31,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:32,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:32,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:32,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:32,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:32,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6427 backedges. 831 proven. 187 refuted. 0 times theorem prover too weak. 5409 trivial. 0 not checked. [2020-07-20 21:40:33,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139897225] [2020-07-20 21:40:33,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:33,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:40:33,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461393775] [2020-07-20 21:40:33,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:40:33,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:33,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:40:33,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:40:33,878 INFO L87 Difference]: Start difference. First operand 163 states and 306 transitions. Second operand 17 states. [2020-07-20 21:40:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:34,277 INFO L93 Difference]: Finished difference Result 197 states and 365 transitions. [2020-07-20 21:40:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:40:34,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-20 21:40:34,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:34,282 INFO L225 Difference]: With dead ends: 197 [2020-07-20 21:40:34,282 INFO L226 Difference]: Without dead ends: 184 [2020-07-20 21:40:34,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 921 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:40:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-20 21:40:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 158. [2020-07-20 21:40:34,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-20 21:40:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 275 transitions. [2020-07-20 21:40:34,295 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 275 transitions. Word has length 475 [2020-07-20 21:40:34,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:34,296 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 275 transitions. [2020-07-20 21:40:34,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:40:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 275 transitions. [2020-07-20 21:40:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-20 21:40:34,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:34,298 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:34,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:34,500 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:34,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:34,501 INFO L82 PathProgramCache]: Analyzing trace with hash -357877815, now seen corresponding path program 49 times [2020-07-20 21:40:34,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:34,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853922502] [2020-07-20 21:40:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:35,413 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:35,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:35,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:40:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 532 proven. 113 refuted. 0 times theorem prover too weak. 5099 trivial. 0 not checked. [2020-07-20 21:40:35,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:36,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:36,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:36,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:36,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:36,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:36,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:36,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:37,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:37,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 532 proven. 120 refuted. 0 times theorem prover too weak. 5092 trivial. 0 not checked. [2020-07-20 21:40:38,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853922502] [2020-07-20 21:40:38,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:38,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 21:40:38,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180950385] [2020-07-20 21:40:38,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:40:38,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:40:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:40:38,649 INFO L87 Difference]: Start difference. First operand 158 states and 275 transitions. Second operand 13 states. [2020-07-20 21:40:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:38,920 INFO L93 Difference]: Finished difference Result 202 states and 382 transitions. [2020-07-20 21:40:38,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:40:38,921 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 450 [2020-07-20 21:40:38,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:38,925 INFO L225 Difference]: With dead ends: 202 [2020-07-20 21:40:38,925 INFO L226 Difference]: Without dead ends: 192 [2020-07-20 21:40:38,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 879 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:40:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-20 21:40:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 158. [2020-07-20 21:40:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-20 21:40:38,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 275 transitions. [2020-07-20 21:40:38,937 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 275 transitions. Word has length 450 [2020-07-20 21:40:38,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:38,938 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 275 transitions. [2020-07-20 21:40:38,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:40:38,938 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 275 transitions. [2020-07-20 21:40:38,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 21:40:38,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:38,940 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:39,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:39,143 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:39,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:39,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1538486435, now seen corresponding path program 50 times [2020-07-20 21:40:39,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:39,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484238443] [2020-07-20 21:40:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:40,062 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:40,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:40,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:40:40,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 671 proven. 157 refuted. 0 times theorem prover too weak. 5625 trivial. 0 not checked. [2020-07-20 21:40:40,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:41,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:41,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:42,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:42,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:42,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:42,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:42,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:42,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 673 proven. 165 refuted. 0 times theorem prover too weak. 5615 trivial. 0 not checked. [2020-07-20 21:40:43,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484238443] [2020-07-20 21:40:43,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:43,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:40:43,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305583964] [2020-07-20 21:40:43,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:40:43,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:43,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:40:43,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:40:43,971 INFO L87 Difference]: Start difference. First operand 158 states and 275 transitions. Second operand 15 states. [2020-07-20 21:40:44,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:44,285 INFO L93 Difference]: Finished difference Result 189 states and 326 transitions. [2020-07-20 21:40:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:40:44,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 476 [2020-07-20 21:40:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:44,293 INFO L225 Difference]: With dead ends: 189 [2020-07-20 21:40:44,293 INFO L226 Difference]: Without dead ends: 176 [2020-07-20 21:40:44,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 927 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:40:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-20 21:40:44,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 150. [2020-07-20 21:40:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-20 21:40:44,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 258 transitions. [2020-07-20 21:40:44,306 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 258 transitions. Word has length 476 [2020-07-20 21:40:44,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:44,306 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 258 transitions. [2020-07-20 21:40:44,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:40:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 258 transitions. [2020-07-20 21:40:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-20 21:40:44,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:44,309 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:44,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:44,510 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:44,511 INFO L82 PathProgramCache]: Analyzing trace with hash -778040446, now seen corresponding path program 51 times [2020-07-20 21:40:44,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:44,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149513695] [2020-07-20 21:40:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:45,439 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:45,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:45,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:40:45,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 679 proven. 125 refuted. 0 times theorem prover too weak. 5252 trivial. 0 not checked. [2020-07-20 21:40:45,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:46,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:46,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:47,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:47,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:47,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:47,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:47,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:47,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:47,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:48,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 681 proven. 133 refuted. 0 times theorem prover too weak. 5242 trivial. 0 not checked. [2020-07-20 21:40:49,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149513695] [2020-07-20 21:40:49,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:49,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:40:49,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317604071] [2020-07-20 21:40:49,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:40:49,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:49,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:40:49,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:40:49,262 INFO L87 Difference]: Start difference. First operand 150 states and 258 transitions. Second operand 15 states. [2020-07-20 21:40:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:49,592 INFO L93 Difference]: Finished difference Result 194 states and 339 transitions. [2020-07-20 21:40:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:40:49,594 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 462 [2020-07-20 21:40:49,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:49,598 INFO L225 Difference]: With dead ends: 194 [2020-07-20 21:40:49,598 INFO L226 Difference]: Without dead ends: 181 [2020-07-20 21:40:49,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 899 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:40:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-07-20 21:40:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 147. [2020-07-20 21:40:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 21:40:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 254 transitions. [2020-07-20 21:40:49,611 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 254 transitions. Word has length 462 [2020-07-20 21:40:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:49,611 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 254 transitions. [2020-07-20 21:40:49,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:40:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 254 transitions. [2020-07-20 21:40:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-20 21:40:49,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:49,614 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 28, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 10, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:49,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:49,815 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:49,816 INFO L82 PathProgramCache]: Analyzing trace with hash -227402005, now seen corresponding path program 52 times [2020-07-20 21:40:49,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:49,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784185524] [2020-07-20 21:40:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:50,750 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:50,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:50,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:40:50,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 904 proven. 127 refuted. 0 times theorem prover too weak. 5449 trivial. 0 not checked. [2020-07-20 21:40:50,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:52,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:53,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:53,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:53,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:53,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:53,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:53,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:53,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:54,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 904 proven. 145 refuted. 0 times theorem prover too weak. 5431 trivial. 0 not checked. [2020-07-20 21:40:55,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784185524] [2020-07-20 21:40:55,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:40:55,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:40:55,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199861407] [2020-07-20 21:40:55,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:40:55,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:40:55,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:40:55,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:40:55,458 INFO L87 Difference]: Start difference. First operand 147 states and 254 transitions. Second operand 17 states. [2020-07-20 21:40:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:40:55,900 INFO L93 Difference]: Finished difference Result 163 states and 269 transitions. [2020-07-20 21:40:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:40:55,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 477 [2020-07-20 21:40:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:40:55,903 INFO L225 Difference]: With dead ends: 163 [2020-07-20 21:40:55,903 INFO L226 Difference]: Without dead ends: 150 [2020-07-20 21:40:55,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 925 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:40:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-20 21:40:55,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2020-07-20 21:40:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-20 21:40:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 249 transitions. [2020-07-20 21:40:55,919 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 249 transitions. Word has length 477 [2020-07-20 21:40:55,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:40:55,919 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 249 transitions. [2020-07-20 21:40:55,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:40:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 249 transitions. [2020-07-20 21:40:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-20 21:40:55,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:40:55,923 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:40:56,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:56,138 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:40:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:40:56,139 INFO L82 PathProgramCache]: Analyzing trace with hash -612621418, now seen corresponding path program 53 times [2020-07-20 21:40:56,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:40:56,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464460283] [2020-07-20 21:40:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:40:57,152 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:40:57,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:40:57,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:40:57,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:40:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 783 proven. 211 refuted. 0 times theorem prover too weak. 5115 trivial. 0 not checked. [2020-07-20 21:40:57,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:40:59,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:59,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:59,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:40:59,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:00,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:00,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:00,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:00,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:00,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 783 proven. 233 refuted. 0 times theorem prover too weak. 5093 trivial. 0 not checked. [2020-07-20 21:41:01,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464460283] [2020-07-20 21:41:01,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:41:01,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:41:01,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342713688] [2020-07-20 21:41:01,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:41:01,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:41:01,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:41:01,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:41:01,770 INFO L87 Difference]: Start difference. First operand 144 states and 249 transitions. Second operand 17 states. [2020-07-20 21:41:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:41:02,279 INFO L93 Difference]: Finished difference Result 187 states and 341 transitions. [2020-07-20 21:41:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:41:02,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 464 [2020-07-20 21:41:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:41:02,282 INFO L225 Difference]: With dead ends: 187 [2020-07-20 21:41:02,282 INFO L226 Difference]: Without dead ends: 172 [2020-07-20 21:41:02,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 899 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:41:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-20 21:41:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2020-07-20 21:41:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-20 21:41:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 273 transitions. [2020-07-20 21:41:02,294 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 273 transitions. Word has length 464 [2020-07-20 21:41:02,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:41:02,295 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 273 transitions. [2020-07-20 21:41:02,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:41:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 273 transitions. [2020-07-20 21:41:02,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-20 21:41:02,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:41:02,297 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:41:02,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:02,498 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:41:02,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:41:02,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 54 times [2020-07-20 21:41:02,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:41:02,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516743661] [2020-07-20 21:41:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:03,525 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:41:03,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:41:03,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 271 conjunts are in the unsatisfiable core [2020-07-20 21:41:03,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:41:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-20 21:41:05,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:41:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-20 21:41:16,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516743661] [2020-07-20 21:41:16,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:41:16,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 52 [2020-07-20 21:41:16,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146901707] [2020-07-20 21:41:16,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-20 21:41:16,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:41:16,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-20 21:41:16,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 21:41:16,204 INFO L87 Difference]: Start difference. First operand 152 states and 273 transitions. Second operand 52 states. [2020-07-20 21:41:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:41:18,698 INFO L93 Difference]: Finished difference Result 333 states and 712 transitions. [2020-07-20 21:41:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-20 21:41:18,701 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 463 [2020-07-20 21:41:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:41:18,710 INFO L225 Difference]: With dead ends: 333 [2020-07-20 21:41:18,711 INFO L226 Difference]: Without dead ends: 326 [2020-07-20 21:41:18,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=153, Invalid=3269, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 21:41:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-07-20 21:41:18,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 225. [2020-07-20 21:41:18,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-20 21:41:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 473 transitions. [2020-07-20 21:41:18,753 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 473 transitions. Word has length 463 [2020-07-20 21:41:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:41:18,754 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 473 transitions. [2020-07-20 21:41:18,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-20 21:41:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 473 transitions. [2020-07-20 21:41:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2020-07-20 21:41:18,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:41:18,760 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 28, 28, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 16, 12, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:41:18,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:18,972 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:41:18,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:41:18,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550295, now seen corresponding path program 55 times [2020-07-20 21:41:18,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:41:18,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729760581] [2020-07-20 21:41:18,974 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:19,943 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:41:19,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:41:19,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:41:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:41:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8056 backedges. 294 proven. 1089 refuted. 0 times theorem prover too weak. 6673 trivial. 0 not checked. [2020-07-20 21:41:20,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:41:24,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:24,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:25,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:25,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:26,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:26,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:26,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:26,916 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 21:41:26,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:26,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:27,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:27,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8056 backedges. 295 proven. 1109 refuted. 0 times theorem prover too weak. 6652 trivial. 0 not checked. [2020-07-20 21:41:27,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729760581] [2020-07-20 21:41:27,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:41:27,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 21:41:27,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389169765] [2020-07-20 21:41:27,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:41:27,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:41:27,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:41:27,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:41:27,462 INFO L87 Difference]: Start difference. First operand 225 states and 473 transitions. Second operand 21 states. [2020-07-20 21:41:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:41:28,259 INFO L93 Difference]: Finished difference Result 336 states and 767 transitions. [2020-07-20 21:41:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:41:28,261 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 525 [2020-07-20 21:41:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:41:28,267 INFO L225 Difference]: With dead ends: 336 [2020-07-20 21:41:28,267 INFO L226 Difference]: Without dead ends: 228 [2020-07-20 21:41:28,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1015 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:41:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-20 21:41:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2020-07-20 21:41:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-20 21:41:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 459 transitions. [2020-07-20 21:41:28,293 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 459 transitions. Word has length 525 [2020-07-20 21:41:28,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:41:28,294 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 459 transitions. [2020-07-20 21:41:28,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:41:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 459 transitions. [2020-07-20 21:41:28,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 21:41:28,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:41:28,298 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 29, 27, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 11, 11, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:41:28,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:28,499 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:41:28,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:41:28,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1316996830, now seen corresponding path program 56 times [2020-07-20 21:41:28,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:41:28,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121196126] [2020-07-20 21:41:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:29,475 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:41:29,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:41:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:41:29,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:41:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 400 proven. 819 refuted. 0 times theorem prover too weak. 5626 trivial. 0 not checked. [2020-07-20 21:41:29,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:41:32,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:32,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:34,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:34,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:34,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:34,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:34,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:34,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:35,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:35,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:35,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 406 proven. 837 refuted. 0 times theorem prover too weak. 5602 trivial. 0 not checked. [2020-07-20 21:41:35,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121196126] [2020-07-20 21:41:35,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:41:35,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:41:35,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317936790] [2020-07-20 21:41:35,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:41:35,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:41:35,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:41:35,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:41:35,781 INFO L87 Difference]: Start difference. First operand 225 states and 459 transitions. Second operand 19 states. [2020-07-20 21:41:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:41:36,373 INFO L93 Difference]: Finished difference Result 263 states and 528 transitions. [2020-07-20 21:41:36,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:41:36,377 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 489 [2020-07-20 21:41:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:41:36,384 INFO L225 Difference]: With dead ends: 263 [2020-07-20 21:41:36,384 INFO L226 Difference]: Without dead ends: 246 [2020-07-20 21:41:36,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 945 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:41:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-20 21:41:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 230. [2020-07-20 21:41:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-07-20 21:41:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 475 transitions. [2020-07-20 21:41:36,439 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 475 transitions. Word has length 489 [2020-07-20 21:41:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:41:36,440 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 475 transitions. [2020-07-20 21:41:36,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:41:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 475 transitions. [2020-07-20 21:41:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 21:41:36,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:41:36,451 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 28, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:41:36,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:36,666 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:41:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:41:36,667 INFO L82 PathProgramCache]: Analyzing trace with hash -87091437, now seen corresponding path program 57 times [2020-07-20 21:41:36,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:41:36,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623711220] [2020-07-20 21:41:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:37,678 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:41:37,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:41:37,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:41:37,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:41:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 740 proven. 115 refuted. 0 times theorem prover too weak. 5586 trivial. 0 not checked. [2020-07-20 21:41:37,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:41:39,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:39,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:39,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:39,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:39,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:39,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:39,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:39,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:39,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:39,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:40,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:40,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 740 proven. 129 refuted. 0 times theorem prover too weak. 5572 trivial. 0 not checked. [2020-07-20 21:41:41,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623711220] [2020-07-20 21:41:41,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:41:41,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 21:41:41,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994493210] [2020-07-20 21:41:41,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:41:41,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:41:41,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:41:41,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:41:41,890 INFO L87 Difference]: Start difference. First operand 230 states and 475 transitions. Second operand 15 states. [2020-07-20 21:41:42,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:41:42,366 INFO L93 Difference]: Finished difference Result 246 states and 492 transitions. [2020-07-20 21:41:42,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:41:42,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 476 [2020-07-20 21:41:42,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:41:42,370 INFO L225 Difference]: With dead ends: 246 [2020-07-20 21:41:42,370 INFO L226 Difference]: Without dead ends: 233 [2020-07-20 21:41:42,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 927 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:41:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-07-20 21:41:42,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2020-07-20 21:41:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-07-20 21:41:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 473 transitions. [2020-07-20 21:41:42,396 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 473 transitions. Word has length 476 [2020-07-20 21:41:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:41:42,396 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 473 transitions. [2020-07-20 21:41:42,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:41:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 473 transitions. [2020-07-20 21:41:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 21:41:42,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:41:42,401 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 28, 28, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 12, 10, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:41:42,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:42,602 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:41:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:41:42,603 INFO L82 PathProgramCache]: Analyzing trace with hash 203868090, now seen corresponding path program 58 times [2020-07-20 21:41:42,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:41:42,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704801039] [2020-07-20 21:41:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:43,628 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:41:43,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:41:43,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:41:43,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:41:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 567 proven. 649 refuted. 0 times theorem prover too weak. 5628 trivial. 0 not checked. [2020-07-20 21:41:43,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:41:47,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:47,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:48,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:48,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:49,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:49,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:49,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:49,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:49,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:49,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 569 proven. 673 refuted. 0 times theorem prover too weak. 5602 trivial. 0 not checked. [2020-07-20 21:41:50,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704801039] [2020-07-20 21:41:50,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:41:50,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:41:50,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464906062] [2020-07-20 21:41:50,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:41:50,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:41:50,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:41:50,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:41:50,389 INFO L87 Difference]: Start difference. First operand 230 states and 473 transitions. Second operand 19 states. [2020-07-20 21:41:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:41:51,011 INFO L93 Difference]: Finished difference Result 276 states and 552 transitions. [2020-07-20 21:41:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:41:51,013 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 489 [2020-07-20 21:41:51,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:41:51,017 INFO L225 Difference]: With dead ends: 276 [2020-07-20 21:41:51,017 INFO L226 Difference]: Without dead ends: 264 [2020-07-20 21:41:51,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 945 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:41:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-20 21:41:51,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 232. [2020-07-20 21:41:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 21:41:51,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 482 transitions. [2020-07-20 21:41:51,053 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 482 transitions. Word has length 489 [2020-07-20 21:41:51,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:41:51,054 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 482 transitions. [2020-07-20 21:41:51,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:41:51,054 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 482 transitions. [2020-07-20 21:41:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 21:41:51,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:41:51,062 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 27, 27, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 11, 11, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:41:51,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:51,276 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:41:51,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:41:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash 67437136, now seen corresponding path program 59 times [2020-07-20 21:41:51,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:41:51,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336893272] [2020-07-20 21:41:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:52,391 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:41:52,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:41:52,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:41:52,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:41:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 471 proven. 463 refuted. 0 times theorem prover too weak. 5856 trivial. 0 not checked. [2020-07-20 21:41:52,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:41:55,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:55,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:55,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:55,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:56,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:56,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:56,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:56,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:56,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:56,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 471 proven. 473 refuted. 0 times theorem prover too weak. 5846 trivial. 0 not checked. [2020-07-20 21:41:57,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336893272] [2020-07-20 21:41:57,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:41:57,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 21:41:57,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990614529] [2020-07-20 21:41:57,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:41:57,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:41:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:41:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:41:57,532 INFO L87 Difference]: Start difference. First operand 232 states and 482 transitions. Second operand 17 states. [2020-07-20 21:41:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:41:58,039 INFO L93 Difference]: Finished difference Result 283 states and 551 transitions. [2020-07-20 21:41:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:41:58,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 487 [2020-07-20 21:41:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:41:58,046 INFO L225 Difference]: With dead ends: 283 [2020-07-20 21:41:58,046 INFO L226 Difference]: Without dead ends: 266 [2020-07-20 21:41:58,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 947 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:41:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-20 21:41:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 235. [2020-07-20 21:41:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-07-20 21:41:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 485 transitions. [2020-07-20 21:41:58,072 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 485 transitions. Word has length 487 [2020-07-20 21:41:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:41:58,072 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 485 transitions. [2020-07-20 21:41:58,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:41:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 485 transitions. [2020-07-20 21:41:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 21:41:58,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:41:58,077 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:41:58,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:58,278 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:41:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:41:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1374059561, now seen corresponding path program 60 times [2020-07-20 21:41:58,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:41:58,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365970848] [2020-07-20 21:41:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:41:59,327 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:41:59,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:41:59,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:41:59,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:41:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 868 proven. 160 refuted. 0 times theorem prover too weak. 5425 trivial. 0 not checked. [2020-07-20 21:41:59,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:42:01,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:01,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:02,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:02,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:02,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:02,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:02,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:02,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:02,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:02,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:02,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:02,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:03,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 870 proven. 176 refuted. 0 times theorem prover too weak. 5407 trivial. 0 not checked. [2020-07-20 21:42:05,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365970848] [2020-07-20 21:42:05,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:42:05,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:42:05,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430308872] [2020-07-20 21:42:05,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:42:05,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:42:05,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:42:05,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:42:05,020 INFO L87 Difference]: Start difference. First operand 235 states and 485 transitions. Second operand 17 states. [2020-07-20 21:42:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:05,576 INFO L93 Difference]: Finished difference Result 277 states and 569 transitions. [2020-07-20 21:42:05,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:42:05,578 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-20 21:42:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:05,583 INFO L225 Difference]: With dead ends: 277 [2020-07-20 21:42:05,583 INFO L226 Difference]: Without dead ends: 264 [2020-07-20 21:42:05,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 923 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:42:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-20 21:42:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 227. [2020-07-20 21:42:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-20 21:42:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 453 transitions. [2020-07-20 21:42:05,609 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 453 transitions. Word has length 476 [2020-07-20 21:42:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:05,609 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 453 transitions. [2020-07-20 21:42:05,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:42:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 453 transitions. [2020-07-20 21:42:05,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 21:42:05,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:05,613 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 28, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:05,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:05,814 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:05,815 INFO L82 PathProgramCache]: Analyzing trace with hash -887787718, now seen corresponding path program 61 times [2020-07-20 21:42:05,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:05,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430124300] [2020-07-20 21:42:05,816 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 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:06,860 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:42:06,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:42:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:42:06,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:42:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6785 backedges. 290 proven. 824 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2020-07-20 21:42:07,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:42:10,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:11,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:11,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:12,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:12,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:12,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:12,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:12,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:12,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:12,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:13,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6785 backedges. 294 proven. 834 refuted. 0 times theorem prover too weak. 5657 trivial. 0 not checked. [2020-07-20 21:42:13,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430124300] [2020-07-20 21:42:13,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:42:13,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:42:13,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285620081] [2020-07-20 21:42:13,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:42:13,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:42:13,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:42:13,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:42:13,340 INFO L87 Difference]: Start difference. First operand 227 states and 453 transitions. Second operand 19 states. [2020-07-20 21:42:14,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:14,022 INFO L93 Difference]: Finished difference Result 326 states and 672 transitions. [2020-07-20 21:42:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:42:14,025 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 488 [2020-07-20 21:42:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:14,031 INFO L225 Difference]: With dead ends: 326 [2020-07-20 21:42:14,031 INFO L226 Difference]: Without dead ends: 245 [2020-07-20 21:42:14,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 945 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:42:14,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-20 21:42:14,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 236. [2020-07-20 21:42:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-20 21:42:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 462 transitions. [2020-07-20 21:42:14,055 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 462 transitions. Word has length 488 [2020-07-20 21:42:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:14,056 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 462 transitions. [2020-07-20 21:42:14,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:42:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 462 transitions. [2020-07-20 21:42:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 21:42:14,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:14,061 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 33, 33, 28, 27, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 12, 12, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:14,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:14,262 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:14,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1437994721, now seen corresponding path program 62 times [2020-07-20 21:42:14,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:14,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304164386] [2020-07-20 21:42:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:15,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:42:15,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:42:15,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:42:15,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:42:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7201 backedges. 320 proven. 991 refuted. 0 times theorem prover too weak. 5890 trivial. 0 not checked. [2020-07-20 21:42:15,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:42:19,292 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 21:42:20,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:20,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:21,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:21,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:22,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:22,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:22,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:22,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:22,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:23,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:23,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7201 backedges. 319 proven. 1013 refuted. 0 times theorem prover too weak. 5869 trivial. 0 not checked. [2020-07-20 21:42:23,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304164386] [2020-07-20 21:42:23,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:42:23,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 21:42:23,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261602279] [2020-07-20 21:42:23,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:42:23,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:42:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:42:23,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:42:23,522 INFO L87 Difference]: Start difference. First operand 236 states and 462 transitions. Second operand 21 states. [2020-07-20 21:42:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:24,408 INFO L93 Difference]: Finished difference Result 311 states and 603 transitions. [2020-07-20 21:42:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:42:24,410 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 500 [2020-07-20 21:42:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:24,416 INFO L225 Difference]: With dead ends: 311 [2020-07-20 21:42:24,416 INFO L226 Difference]: Without dead ends: 245 [2020-07-20 21:42:24,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1006 GetRequests, 965 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:42:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-20 21:42:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 233. [2020-07-20 21:42:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-20 21:42:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 446 transitions. [2020-07-20 21:42:24,451 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 446 transitions. Word has length 500 [2020-07-20 21:42:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:24,451 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 446 transitions. [2020-07-20 21:42:24,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:42:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 446 transitions. [2020-07-20 21:42:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:42:24,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:24,458 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:24,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:24,668 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:24,669 INFO L82 PathProgramCache]: Analyzing trace with hash 516830041, now seen corresponding path program 63 times [2020-07-20 21:42:24,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:24,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429012380] [2020-07-20 21:42:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:25,758 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:42:25,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:42:25,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:42:25,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:42:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 785 proven. 125 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-20 21:42:26,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:42:27,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:28,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:28,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:28,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:28,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:28,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:28,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:29,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:29,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 783 proven. 137 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-20 21:42:31,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429012380] [2020-07-20 21:42:31,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:42:31,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 21:42:31,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521472638] [2020-07-20 21:42:31,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:42:31,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:42:31,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:42:31,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:42:31,263 INFO L87 Difference]: Start difference. First operand 233 states and 446 transitions. Second operand 17 states. [2020-07-20 21:42:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:31,764 INFO L93 Difference]: Finished difference Result 243 states and 456 transitions. [2020-07-20 21:42:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:42:31,764 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-20 21:42:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:31,768 INFO L225 Difference]: With dead ends: 243 [2020-07-20 21:42:31,768 INFO L226 Difference]: Without dead ends: 230 [2020-07-20 21:42:31,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:42:31,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-20 21:42:31,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2020-07-20 21:42:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-07-20 21:42:31,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 440 transitions. [2020-07-20 21:42:31,796 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 440 transitions. Word has length 475 [2020-07-20 21:42:31,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:31,796 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 440 transitions. [2020-07-20 21:42:31,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:42:31,796 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 440 transitions. [2020-07-20 21:42:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:42:31,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:31,802 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:32,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:32,015 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:32,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1570124953, now seen corresponding path program 64 times [2020-07-20 21:42:32,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:32,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819956405] [2020-07-20 21:42:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:33,113 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:42:33,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:42:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:42:33,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:42:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 772 proven. 138 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-20 21:42:33,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:42:35,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:35,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:36,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:36,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:36,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:36,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:36,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:37,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 770 proven. 150 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-20 21:42:38,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819956405] [2020-07-20 21:42:38,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:42:38,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 21:42:38,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113816367] [2020-07-20 21:42:38,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:42:38,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:42:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:42:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:42:38,619 INFO L87 Difference]: Start difference. First operand 230 states and 440 transitions. Second operand 17 states. [2020-07-20 21:42:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:39,127 INFO L93 Difference]: Finished difference Result 296 states and 573 transitions. [2020-07-20 21:42:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:42:39,129 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-20 21:42:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:39,135 INFO L225 Difference]: With dead ends: 296 [2020-07-20 21:42:39,135 INFO L226 Difference]: Without dead ends: 283 [2020-07-20 21:42:39,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:42:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-20 21:42:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2020-07-20 21:42:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-20 21:42:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 446 transitions. [2020-07-20 21:42:39,171 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 446 transitions. Word has length 475 [2020-07-20 21:42:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:39,171 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 446 transitions. [2020-07-20 21:42:39,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:42:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 446 transitions. [2020-07-20 21:42:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 21:42:39,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:39,178 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 27, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:39,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:39,392 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:39,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:39,393 INFO L82 PathProgramCache]: Analyzing trace with hash 501741467, now seen corresponding path program 65 times [2020-07-20 21:42:39,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:39,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779770839] [2020-07-20 21:42:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:40,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:42:40,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:42:40,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:42:40,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:42:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 406 proven. 904 refuted. 0 times theorem prover too weak. 5812 trivial. 0 not checked. [2020-07-20 21:42:40,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:42:45,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:45,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:46,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:46,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:47,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:47,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:47,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:48,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:48,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:48,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:48,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 405 proven. 926 refuted. 0 times theorem prover too weak. 5791 trivial. 0 not checked. [2020-07-20 21:42:48,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779770839] [2020-07-20 21:42:48,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:42:48,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 21:42:48,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555228328] [2020-07-20 21:42:48,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:42:48,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:42:48,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:42:48,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:42:48,912 INFO L87 Difference]: Start difference. First operand 233 states and 446 transitions. Second operand 21 states. [2020-07-20 21:42:49,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:49,730 INFO L93 Difference]: Finished difference Result 277 states and 522 transitions. [2020-07-20 21:42:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:42:49,736 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 499 [2020-07-20 21:42:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:49,741 INFO L225 Difference]: With dead ends: 277 [2020-07-20 21:42:49,741 INFO L226 Difference]: Without dead ends: 260 [2020-07-20 21:42:49,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 963 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:42:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-20 21:42:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 241. [2020-07-20 21:42:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-07-20 21:42:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 463 transitions. [2020-07-20 21:42:49,775 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 463 transitions. Word has length 499 [2020-07-20 21:42:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:49,776 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 463 transitions. [2020-07-20 21:42:49,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:42:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 463 transitions. [2020-07-20 21:42:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 21:42:49,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:49,783 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 28, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:49,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:49,997 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:49,998 INFO L82 PathProgramCache]: Analyzing trace with hash -155346200, now seen corresponding path program 66 times [2020-07-20 21:42:49,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:49,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258286014] [2020-07-20 21:42:49,999 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 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:51,217 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:42:51,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:42:51,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:42:51,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:42:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6785 backedges. 822 proven. 232 refuted. 0 times theorem prover too weak. 5731 trivial. 0 not checked. [2020-07-20 21:42:51,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:42:53,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:53,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:54,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:54,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:54,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:54,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:55,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:55,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:55,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:55,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:55,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:55,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:56,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6785 backedges. 824 proven. 248 refuted. 0 times theorem prover too weak. 5713 trivial. 0 not checked. [2020-07-20 21:42:57,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258286014] [2020-07-20 21:42:57,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:42:57,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 21:42:57,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863440230] [2020-07-20 21:42:57,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:42:57,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:42:57,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:42:57,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:42:57,596 INFO L87 Difference]: Start difference. First operand 241 states and 463 transitions. Second operand 17 states. [2020-07-20 21:42:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:42:58,168 INFO L93 Difference]: Finished difference Result 273 states and 502 transitions. [2020-07-20 21:42:58,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:42:58,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 488 [2020-07-20 21:42:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:42:58,175 INFO L225 Difference]: With dead ends: 273 [2020-07-20 21:42:58,175 INFO L226 Difference]: Without dead ends: 250 [2020-07-20 21:42:58,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 947 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:42:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-20 21:42:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 235. [2020-07-20 21:42:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-07-20 21:42:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 454 transitions. [2020-07-20 21:42:58,198 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 454 transitions. Word has length 488 [2020-07-20 21:42:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:42:58,198 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 454 transitions. [2020-07-20 21:42:58,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:42:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 454 transitions. [2020-07-20 21:42:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 21:42:58,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:42:58,203 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 27, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 12, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:42:58,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:58,405 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:42:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:42:58,405 INFO L82 PathProgramCache]: Analyzing trace with hash -614745669, now seen corresponding path program 67 times [2020-07-20 21:42:58,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:42:58,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858234869] [2020-07-20 21:42:58,406 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 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:42:59,522 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:42:59,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:42:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:42:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:42:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7138 backedges. 371 proven. 768 refuted. 0 times theorem prover too weak. 5999 trivial. 0 not checked. [2020-07-20 21:42:59,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:43:03,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:03,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:05,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:05,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:05,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:05,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:05,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:05,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:06,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:06,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7138 backedges. 373 proven. 782 refuted. 0 times theorem prover too weak. 5983 trivial. 0 not checked. [2020-07-20 21:43:06,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858234869] [2020-07-20 21:43:06,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:43:06,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:43:06,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898477304] [2020-07-20 21:43:06,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:43:06,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:43:06,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:43:06,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:43:06,757 INFO L87 Difference]: Start difference. First operand 235 states and 454 transitions. Second operand 19 states. [2020-07-20 21:43:07,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:43:07,541 INFO L93 Difference]: Finished difference Result 306 states and 607 transitions. [2020-07-20 21:43:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:43:07,545 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 499 [2020-07-20 21:43:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:43:07,551 INFO L225 Difference]: With dead ends: 306 [2020-07-20 21:43:07,552 INFO L226 Difference]: Without dead ends: 279 [2020-07-20 21:43:07,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 967 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:43:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-07-20 21:43:07,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 232. [2020-07-20 21:43:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 21:43:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 449 transitions. [2020-07-20 21:43:07,583 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 449 transitions. Word has length 499 [2020-07-20 21:43:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:43:07,584 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 449 transitions. [2020-07-20 21:43:07,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:43:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 449 transitions. [2020-07-20 21:43:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:43:07,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:43:07,588 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:43:07,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:07,790 INFO L427 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:43:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:43:07,791 INFO L82 PathProgramCache]: Analyzing trace with hash 878879307, now seen corresponding path program 68 times [2020-07-20 21:43:07,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:43:07,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963101280] [2020-07-20 21:43:07,792 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 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:08,922 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:43:08,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:43:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:43:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:43:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 578 proven. 662 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-20 21:43:09,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:43:13,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:14,155 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 21:43:14,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:14,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:15,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:15,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:15,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:16,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:16,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:16,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:16,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:16,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 575 proven. 686 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-20 21:43:17,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963101280] [2020-07-20 21:43:17,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:43:17,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 21:43:17,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481782826] [2020-07-20 21:43:17,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:43:17,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:43:17,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:43:17,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:43:17,700 INFO L87 Difference]: Start difference. First operand 232 states and 449 transitions. Second operand 21 states. [2020-07-20 21:43:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:43:18,555 INFO L93 Difference]: Finished difference Result 299 states and 569 transitions. [2020-07-20 21:43:18,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:43:18,558 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-20 21:43:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:43:18,563 INFO L225 Difference]: With dead ends: 299 [2020-07-20 21:43:18,563 INFO L226 Difference]: Without dead ends: 287 [2020-07-20 21:43:18,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:43:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-07-20 21:43:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 227. [2020-07-20 21:43:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-20 21:43:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 440 transitions. [2020-07-20 21:43:18,589 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 440 transitions. Word has length 475 [2020-07-20 21:43:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:43:18,589 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 440 transitions. [2020-07-20 21:43:18,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:43:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 440 transitions. [2020-07-20 21:43:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:43:18,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:43:18,594 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:43:18,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:18,795 INFO L427 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:43:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:43:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash -582108663, now seen corresponding path program 69 times [2020-07-20 21:43:18,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:43:18,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577822324] [2020-07-20 21:43:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:19,958 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:43:19,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:43:19,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:43:19,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:43:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 930 proven. 151 refuted. 0 times theorem prover too weak. 5333 trivial. 0 not checked. [2020-07-20 21:43:20,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:43:23,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:23,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:23,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:23,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:24,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:24,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:24,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:24,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:24,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:25,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 928 proven. 167 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-20 21:43:27,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577822324] [2020-07-20 21:43:27,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:43:27,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:43:27,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524127557] [2020-07-20 21:43:27,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:43:27,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:43:27,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:43:27,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:43:27,453 INFO L87 Difference]: Start difference. First operand 227 states and 440 transitions. Second operand 19 states. [2020-07-20 21:43:28,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:43:28,216 INFO L93 Difference]: Finished difference Result 269 states and 501 transitions. [2020-07-20 21:43:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:43:28,219 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-20 21:43:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:43:28,223 INFO L225 Difference]: With dead ends: 269 [2020-07-20 21:43:28,223 INFO L226 Difference]: Without dead ends: 259 [2020-07-20 21:43:28,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:43:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-07-20 21:43:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 219. [2020-07-20 21:43:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-07-20 21:43:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 423 transitions. [2020-07-20 21:43:28,247 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 423 transitions. Word has length 475 [2020-07-20 21:43:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:43:28,247 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 423 transitions. [2020-07-20 21:43:28,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:43:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 423 transitions. [2020-07-20 21:43:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:43:28,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:43:28,252 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:43:28,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:28,453 INFO L427 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:43:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:43:28,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1577557621, now seen corresponding path program 70 times [2020-07-20 21:43:28,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:43:28,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495274482] [2020-07-20 21:43:28,455 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 88 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:29,624 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:43:29,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:43:29,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:43:29,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:43:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 698 proven. 212 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-20 21:43:29,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:43:32,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:32,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:32,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:32,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:33,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:33,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:33,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:33,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:33,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:33,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:34,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 698 proven. 222 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-20 21:43:35,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495274482] [2020-07-20 21:43:35,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:43:35,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 21:43:35,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693125425] [2020-07-20 21:43:35,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:43:35,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:43:35,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:43:35,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:43:35,845 INFO L87 Difference]: Start difference. First operand 219 states and 423 transitions. Second operand 17 states. [2020-07-20 21:43:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:43:36,466 INFO L93 Difference]: Finished difference Result 249 states and 457 transitions. [2020-07-20 21:43:36,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:43:36,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-20 21:43:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:43:36,474 INFO L225 Difference]: With dead ends: 249 [2020-07-20 21:43:36,474 INFO L226 Difference]: Without dead ends: 234 [2020-07-20 21:43:36,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:43:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-20 21:43:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 219. [2020-07-20 21:43:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-07-20 21:43:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 423 transitions. [2020-07-20 21:43:36,497 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 423 transitions. Word has length 475 [2020-07-20 21:43:36,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:43:36,497 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 423 transitions. [2020-07-20 21:43:36,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:43:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 423 transitions. [2020-07-20 21:43:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:43:36,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:43:36,501 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:43:36,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:36,703 INFO L427 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:43:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:43:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash -855524837, now seen corresponding path program 71 times [2020-07-20 21:43:36,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:43:36,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119053076] [2020-07-20 21:43:36,705 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 89 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:37,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:43:37,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:43:38,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:43:38,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:43:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 847 proven. 232 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2020-07-20 21:43:38,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:43:41,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:41,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:42,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:42,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:42,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:42,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:42,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:43,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:43,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:43,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 845 proven. 250 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-20 21:43:45,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119053076] [2020-07-20 21:43:45,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:43:45,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:43:45,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373030742] [2020-07-20 21:43:45,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:43:45,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:43:45,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:43:45,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:43:45,534 INFO L87 Difference]: Start difference. First operand 219 states and 423 transitions. Second operand 19 states. [2020-07-20 21:43:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:43:46,256 INFO L93 Difference]: Finished difference Result 246 states and 451 transitions. [2020-07-20 21:43:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:43:46,256 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-20 21:43:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:43:46,259 INFO L225 Difference]: With dead ends: 246 [2020-07-20 21:43:46,259 INFO L226 Difference]: Without dead ends: 231 [2020-07-20 21:43:46,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:43:46,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-07-20 21:43:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 211. [2020-07-20 21:43:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-07-20 21:43:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 390 transitions. [2020-07-20 21:43:46,281 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 390 transitions. Word has length 475 [2020-07-20 21:43:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:43:46,281 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 390 transitions. [2020-07-20 21:43:46,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:43:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 390 transitions. [2020-07-20 21:43:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-20 21:43:46,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:43:46,285 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:43:46,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:46,486 INFO L427 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:43:46,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:43:46,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1698746006, now seen corresponding path program 72 times [2020-07-20 21:43:46,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:43:46,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47851085] [2020-07-20 21:43:46,488 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 90 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:47,677 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:43:47,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:43:47,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:43:47,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:43:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 837 proven. 318 refuted. 0 times theorem prover too weak. 4954 trivial. 0 not checked. [2020-07-20 21:43:47,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:43:49,981 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:43:51,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:52,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:52,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:53,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:53,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:53,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:53,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:53,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:54,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:54,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 841 proven. 338 refuted. 0 times theorem prover too weak. 4930 trivial. 0 not checked. [2020-07-20 21:43:56,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47851085] [2020-07-20 21:43:56,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:43:56,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 21:43:56,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807856354] [2020-07-20 21:43:56,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:43:56,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:43:56,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:43:56,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:43:56,190 INFO L87 Difference]: Start difference. First operand 211 states and 390 transitions. Second operand 19 states. [2020-07-20 21:43:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:43:56,981 INFO L93 Difference]: Finished difference Result 280 states and 513 transitions. [2020-07-20 21:43:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:43:56,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 464 [2020-07-20 21:43:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:43:56,990 INFO L225 Difference]: With dead ends: 280 [2020-07-20 21:43:56,990 INFO L226 Difference]: Without dead ends: 265 [2020-07-20 21:43:56,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 934 GetRequests, 895 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:43:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-20 21:43:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 211. [2020-07-20 21:43:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-07-20 21:43:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 390 transitions. [2020-07-20 21:43:57,015 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 390 transitions. Word has length 464 [2020-07-20 21:43:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:43:57,015 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 390 transitions. [2020-07-20 21:43:57,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:43:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 390 transitions. [2020-07-20 21:43:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:43:57,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:43:57,019 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:43:57,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:57,220 INFO L427 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:43:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:43:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1184834597, now seen corresponding path program 73 times [2020-07-20 21:43:57,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:43:57,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737981224] [2020-07-20 21:43:57,222 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 91 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:43:58,417 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:43:58,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:43:58,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:43:58,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:43:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 503 proven. 578 refuted. 0 times theorem prover too weak. 5333 trivial. 0 not checked. [2020-07-20 21:43:58,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:44:03,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:03,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:03,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:03,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:04,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:04,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:04,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:05,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:05,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 505 proven. 590 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-20 21:44:07,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737981224] [2020-07-20 21:44:07,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:44:07,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:44:07,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310509700] [2020-07-20 21:44:07,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:44:07,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:44:07,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:44:07,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:44:07,278 INFO L87 Difference]: Start difference. First operand 211 states and 390 transitions. Second operand 19 states. [2020-07-20 21:44:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:44:07,990 INFO L93 Difference]: Finished difference Result 269 states and 494 transitions. [2020-07-20 21:44:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:44:07,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-20 21:44:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:44:07,999 INFO L225 Difference]: With dead ends: 269 [2020-07-20 21:44:07,999 INFO L226 Difference]: Without dead ends: 252 [2020-07-20 21:44:08,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:44:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-20 21:44:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 203. [2020-07-20 21:44:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-07-20 21:44:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 372 transitions. [2020-07-20 21:44:08,026 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 372 transitions. Word has length 475 [2020-07-20 21:44:08,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:44:08,026 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 372 transitions. [2020-07-20 21:44:08,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:44:08,027 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 372 transitions. [2020-07-20 21:44:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:44:08,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:44:08,031 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:44:08,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:08,246 INFO L427 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:44:08,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:44:08,247 INFO L82 PathProgramCache]: Analyzing trace with hash -151584039, now seen corresponding path program 74 times [2020-07-20 21:44:08,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:44:08,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553878840] [2020-07-20 21:44:08,248 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 92 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:09,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:44:09,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:44:09,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:44:09,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:44:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 899 proven. 341 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-20 21:44:09,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:44:13,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:13,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:14,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:15,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:15,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:16,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:16,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:16,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:16,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:16,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:17,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 896 proven. 365 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-20 21:44:19,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553878840] [2020-07-20 21:44:19,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:44:19,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 21:44:19,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069356855] [2020-07-20 21:44:19,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:44:19,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:44:19,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:44:19,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:44:19,067 INFO L87 Difference]: Start difference. First operand 203 states and 372 transitions. Second operand 21 states. [2020-07-20 21:44:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:44:20,061 INFO L93 Difference]: Finished difference Result 293 states and 540 transitions. [2020-07-20 21:44:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:44:20,062 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-20 21:44:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:44:20,067 INFO L225 Difference]: With dead ends: 293 [2020-07-20 21:44:20,067 INFO L226 Difference]: Without dead ends: 278 [2020-07-20 21:44:20,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:44:20,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-20 21:44:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 193. [2020-07-20 21:44:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-20 21:44:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 339 transitions. [2020-07-20 21:44:20,095 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 339 transitions. Word has length 475 [2020-07-20 21:44:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:44:20,095 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 339 transitions. [2020-07-20 21:44:20,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:44:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 339 transitions. [2020-07-20 21:44:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:44:20,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:44:20,101 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:44:20,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:20,306 INFO L427 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:44:20,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:44:20,307 INFO L82 PathProgramCache]: Analyzing trace with hash -583811255, now seen corresponding path program 75 times [2020-07-20 21:44:20,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:44:20,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026547594] [2020-07-20 21:44:20,308 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 93 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:21,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:44:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:44:21,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:44:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:44:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 787 proven. 292 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2020-07-20 21:44:21,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:44:24,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:24,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:25,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:26,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:26,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:26,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:27,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:27,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:27,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:27,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 787 proven. 308 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-20 21:44:29,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026547594] [2020-07-20 21:44:29,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:44:29,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 21:44:29,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339888795] [2020-07-20 21:44:29,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:44:29,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:44:29,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:44:29,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:44:29,505 INFO L87 Difference]: Start difference. First operand 193 states and 339 transitions. Second operand 19 states. [2020-07-20 21:44:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:44:30,247 INFO L93 Difference]: Finished difference Result 241 states and 423 transitions. [2020-07-20 21:44:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:44:30,251 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-20 21:44:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:44:30,255 INFO L225 Difference]: With dead ends: 241 [2020-07-20 21:44:30,256 INFO L226 Difference]: Without dead ends: 208 [2020-07-20 21:44:30,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:44:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-20 21:44:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 137. [2020-07-20 21:44:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-20 21:44:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 240 transitions. [2020-07-20 21:44:30,270 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 240 transitions. Word has length 475 [2020-07-20 21:44:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:44:30,271 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 240 transitions. [2020-07-20 21:44:30,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:44:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 240 transitions. [2020-07-20 21:44:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-20 21:44:30,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:44:30,275 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:44:30,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:30,482 INFO L427 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:44:30,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:44:30,483 INFO L82 PathProgramCache]: Analyzing trace with hash -477489234, now seen corresponding path program 76 times [2020-07-20 21:44:30,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:44:30,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585544540] [2020-07-20 21:44:30,484 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 94 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:31,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:44:31,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:44:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:44:31,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:44:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 228 proven. 1083 refuted. 0 times theorem prover too weak. 4798 trivial. 0 not checked. [2020-07-20 21:44:32,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:44:37,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:39,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:39,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:40,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:40,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:41,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:41,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:42,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:42,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:42,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:42,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:42,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:42,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:42,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 234 proven. 1110 refuted. 0 times theorem prover too weak. 4765 trivial. 0 not checked. [2020-07-20 21:44:42,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585544540] [2020-07-20 21:44:42,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:44:42,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 21:44:42,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898356263] [2020-07-20 21:44:42,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:44:42,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:44:42,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:44:42,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:44:42,690 INFO L87 Difference]: Start difference. First operand 137 states and 240 transitions. Second operand 21 states. [2020-07-20 21:44:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:44:43,852 INFO L93 Difference]: Finished difference Result 236 states and 444 transitions. [2020-07-20 21:44:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:44:43,856 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 464 [2020-07-20 21:44:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:44:43,861 INFO L225 Difference]: With dead ends: 236 [2020-07-20 21:44:43,861 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 21:44:43,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 891 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:44:43,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 21:44:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-20 21:44:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 21:44:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 189 transitions. [2020-07-20 21:44:43,875 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 189 transitions. Word has length 464 [2020-07-20 21:44:43,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:44:43,876 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 189 transitions. [2020-07-20 21:44:43,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:44:43,876 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 189 transitions. [2020-07-20 21:44:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:44:43,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:44:43,878 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:44:44,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:44,080 INFO L427 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:44:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:44:44,081 INFO L82 PathProgramCache]: Analyzing trace with hash 759223819, now seen corresponding path program 77 times [2020-07-20 21:44:44,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:44:44,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903955345] [2020-07-20 21:44:44,082 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 95 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:45,336 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:44:45,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:44:45,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:44:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:44:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 258 proven. 982 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-20 21:44:45,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:44:50,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:52,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:52,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:53,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:54,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:54,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:54,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:54,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:54,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:55,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:44:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 259 proven. 1002 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-20 21:44:55,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903955345] [2020-07-20 21:44:55,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:44:55,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 21:44:55,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286120563] [2020-07-20 21:44:55,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:44:55,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:44:55,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:44:55,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:44:55,195 INFO L87 Difference]: Start difference. First operand 134 states and 189 transitions. Second operand 21 states. [2020-07-20 21:44:56,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:44:56,225 INFO L93 Difference]: Finished difference Result 220 states and 301 transitions. [2020-07-20 21:44:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:44:56,228 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-20 21:44:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:44:56,233 INFO L225 Difference]: With dead ends: 220 [2020-07-20 21:44:56,233 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 21:44:56,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:44:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 21:44:56,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2020-07-20 21:44:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 21:44:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2020-07-20 21:44:56,249 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 475 [2020-07-20 21:44:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:44:56,250 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2020-07-20 21:44:56,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:44:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2020-07-20 21:44:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 21:44:56,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:44:56,253 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:44:56,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:56,454 INFO L427 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:44:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:44:56,455 INFO L82 PathProgramCache]: Analyzing trace with hash -247769445, now seen corresponding path program 78 times [2020-07-20 21:44:56,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:44:56,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527968068] [2020-07-20 21:44:56,456 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 96 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:44:57,718 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:44:57,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:44:57,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:44:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:44:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 258 proven. 1140 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2020-07-20 21:44:58,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:45:04,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:04,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:07,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:07,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:08,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:08,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:09,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:09,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:10,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:10,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:10,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:10,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:45:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 255 proven. 1173 refuted. 0 times theorem prover too weak. 4986 trivial. 0 not checked. [2020-07-20 21:45:11,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527968068] [2020-07-20 21:45:11,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:45:11,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 23 [2020-07-20 21:45:11,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186228231] [2020-07-20 21:45:11,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 21:45:11,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:45:11,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 21:45:11,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:45:11,105 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand 23 states. [2020-07-20 21:45:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:45:12,316 INFO L93 Difference]: Finished difference Result 203 states and 251 transitions. [2020-07-20 21:45:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:45:12,319 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 475 [2020-07-20 21:45:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:45:12,323 INFO L225 Difference]: With dead ends: 203 [2020-07-20 21:45:12,323 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:45:12,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 911 SyntacticMatches, 17 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:45:12,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:45:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:45:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:45:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:45:12,330 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 475 [2020-07-20 21:45:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:45:12,331 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:45:12,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 21:45:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:45:12,331 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:45:12,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:45:12,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:45:21,666 WARN L193 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 668 DAG size of output: 255 [2020-07-20 21:45:24,739 WARN L193 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 536 DAG size of output: 202 [2020-07-20 21:45:29,203 WARN L193 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 604 DAG size of output: 222 [2020-07-20 21:45:30,340 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 383 DAG size of output: 137 [2020-07-20 21:45:37,124 WARN L193 SmtUtils]: Spent 6.78 s on a formula simplification. DAG size of input: 672 DAG size of output: 255 [2020-07-20 21:45:40,723 WARN L193 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 566 DAG size of output: 208 [2020-07-20 21:45:41,000 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 71 [2020-07-20 21:45:45,159 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 585 DAG size of output: 218 [2020-07-20 21:45:45,383 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 77 [2020-07-20 21:45:49,621 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 583 DAG size of output: 217 [2020-07-20 21:45:54,037 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 583 DAG size of output: 217 [2020-07-20 21:45:55,534 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 438 DAG size of output: 156 [2020-07-20 21:45:55,755 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 77 [2020-07-20 21:45:55,963 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 82 [2020-07-20 21:46:01,687 WARN L193 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 644 DAG size of output: 237 [2020-07-20 21:46:01,922 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 72 [2020-07-20 21:46:07,349 WARN L193 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 645 DAG size of output: 244 [2020-07-20 21:46:12,865 WARN L193 SmtUtils]: Spent 5.51 s on a formula simplification. DAG size of input: 659 DAG size of output: 245 [2020-07-20 21:46:15,768 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 533 DAG size of output: 202 [2020-07-20 21:46:22,687 WARN L193 SmtUtils]: Spent 6.83 s on a formula simplification. DAG size of input: 682 DAG size of output: 260 [2020-07-20 21:46:23,180 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 100 [2020-07-20 21:46:23,344 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 74 [2020-07-20 21:46:23,621 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 78 [2020-07-20 21:46:23,731 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 54 [2020-07-20 21:46:29,258 WARN L193 SmtUtils]: Spent 5.52 s on a formula simplification. DAG size of input: 644 DAG size of output: 237 [2020-07-20 21:46:35,146 WARN L193 SmtUtils]: Spent 5.88 s on a formula simplification. DAG size of input: 659 DAG size of output: 245 [2020-07-20 21:46:35,529 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 64 [2020-07-20 21:46:38,941 WARN L193 SmtUtils]: Spent 3.36 s on a formula simplification. DAG size of input: 558 DAG size of output: 211 [2020-07-20 21:46:45,642 WARN L193 SmtUtils]: Spent 6.70 s on a formula simplification. DAG size of input: 682 DAG size of output: 260 [2020-07-20 21:46:46,475 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 120 [2020-07-20 21:46:51,843 WARN L193 SmtUtils]: Spent 5.36 s on a formula simplification. DAG size of input: 649 DAG size of output: 244 [2020-07-20 21:46:56,486 WARN L193 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 619 DAG size of output: 224 [2020-07-20 21:46:56,915 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 92 [2020-07-20 21:47:03,541 WARN L193 SmtUtils]: Spent 6.62 s on a formula simplification. DAG size of input: 672 DAG size of output: 255 [2020-07-20 21:47:06,969 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 558 DAG size of output: 211 [2020-07-20 21:47:13,712 WARN L193 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 682 DAG size of output: 260 [2020-07-20 21:47:19,101 WARN L193 SmtUtils]: Spent 5.39 s on a formula simplification. DAG size of input: 649 DAG size of output: 244 [2020-07-20 21:47:19,363 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 78 [2020-07-20 21:47:19,605 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 77 [2020-07-20 21:47:25,039 WARN L193 SmtUtils]: Spent 5.43 s on a formula simplification. DAG size of input: 659 DAG size of output: 245 [2020-07-20 21:47:29,138 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 585 DAG size of output: 218 [2020-07-20 21:47:29,306 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 76 [2020-07-20 21:47:33,876 WARN L193 SmtUtils]: Spent 4.57 s on a formula simplification. DAG size of input: 619 DAG size of output: 224 [2020-07-20 21:47:34,098 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 77 [2020-07-20 21:47:37,632 WARN L193 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 566 DAG size of output: 208 [2020-07-20 21:47:43,999 WARN L193 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 668 DAG size of output: 255 [2020-07-20 21:47:44,284 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 84 [2020-07-20 21:47:48,372 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 596 DAG size of output: 219 [2020-07-20 21:47:51,791 WARN L193 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 575 DAG size of output: 212 [2020-07-20 21:47:57,159 WARN L193 SmtUtils]: Spent 5.37 s on a formula simplification. DAG size of input: 645 DAG size of output: 244 [2020-07-20 21:48:03,996 WARN L193 SmtUtils]: Spent 6.77 s on a formula simplification. DAG size of input: 682 DAG size of output: 260 [2020-07-20 21:48:08,164 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 596 DAG size of output: 219 [2020-07-20 21:48:12,285 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 582 DAG size of output: 218 [2020-07-20 21:48:19,157 WARN L193 SmtUtils]: Spent 6.87 s on a formula simplification. DAG size of input: 681 DAG size of output: 261 [2020-07-20 21:48:25,796 WARN L193 SmtUtils]: Spent 6.63 s on a formula simplification. DAG size of input: 672 DAG size of output: 255 [2020-07-20 21:48:25,926 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 56 [2020-07-20 21:48:26,204 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 78 [2020-07-20 21:48:26,393 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 77 [2020-07-20 21:48:31,826 WARN L193 SmtUtils]: Spent 5.43 s on a formula simplification. DAG size of input: 649 DAG size of output: 244 [2020-07-20 21:48:35,997 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 586 DAG size of output: 217 [2020-07-20 21:48:36,968 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 128 [2020-07-20 21:48:43,786 WARN L193 SmtUtils]: Spent 6.81 s on a formula simplification. DAG size of input: 681 DAG size of output: 261 [2020-07-20 21:48:44,101 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 71 [2020-07-20 21:48:44,366 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 78 [2020-07-20 21:48:44,587 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 77 [2020-07-20 21:48:51,125 WARN L193 SmtUtils]: Spent 6.54 s on a formula simplification. DAG size of input: 668 DAG size of output: 255 [2020-07-20 21:48:51,346 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 77 [2020-07-20 21:48:51,537 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 79 [2020-07-20 21:48:54,961 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 571 DAG size of output: 211 [2020-07-20 21:49:00,403 WARN L193 SmtUtils]: Spent 5.44 s on a formula simplification. DAG size of input: 645 DAG size of output: 244 [2020-07-20 21:49:04,021 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 563 DAG size of output: 208 [2020-07-20 21:49:11,086 WARN L193 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 695 DAG size of output: 267 [2020-07-20 21:49:17,736 WARN L193 SmtUtils]: Spent 6.65 s on a formula simplification. DAG size of input: 671 DAG size of output: 256 [2020-07-20 21:49:21,348 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 580 DAG size of output: 215 [2020-07-20 21:49:25,483 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 586 DAG size of output: 217