/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 BIGGEST_EQUIVALENCE_CLASS --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 [2020-07-21 22:19:51,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:19:51,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:19:51,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:19:51,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:19:51,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:19:51,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:19:51,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:19:51,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:19:51,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:19:51,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:19:51,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:19:51,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:19:51,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:19:51,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:19:51,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:19:51,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:19:51,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:19:51,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:19:51,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:19:51,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:19:51,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:19:51,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:19:51,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:19:51,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:19:51,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:19:51,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:19:51,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:19:51,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:19:51,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:19:51,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:19:51,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:19:51,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:19:51,456 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:19:51,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:19:51,456 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:19:51,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:19:51,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:19:51,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:19:51,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:19:51,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:19:51,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:19:51,458 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:19:51,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:19:51,459 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:19:51,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:19:51,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:19:51,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:19:51,460 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:19:51,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:19:51,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:19:51,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:19:51,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:19:51,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:19:51,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:19:51,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:51,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:19:51,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:19:51,462 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:19:51,739 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:19:51,753 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:19:51,756 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:19:51,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:19:51,757 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:19:51,758 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-21 22:19:51,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf783109/804b8a3f11e240d9a6cb19f497555af4/FLAG6d1750ee5 [2020-07-21 22:19:52,293 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:19:52,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-21 22:19:52,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf783109/804b8a3f11e240d9a6cb19f497555af4/FLAG6d1750ee5 [2020-07-21 22:19:52,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf783109/804b8a3f11e240d9a6cb19f497555af4 [2020-07-21 22:19:52,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:19:52,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:19:52,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:19:52,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:19:52,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:19:52,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:19:52" (1/1) ... [2020-07-21 22:19:52,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23116018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:52, skipping insertion in model container [2020-07-21 22:19:52,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:19:52" (1/1) ... [2020-07-21 22:19:52,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:19:52,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:19:52,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:19:52,857 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:19:52,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:19:52,889 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:19:52,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:52 WrapperNode [2020-07-21 22:19:52,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:19:52,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:19:52,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:19:52,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:19:52,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:52" (1/1) ... [2020-07-21 22:19:52,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:52" (1/1) ... [2020-07-21 22:19:52,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:52" (1/1) ... [2020-07-21 22:19:52,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:52" (1/1) ... [2020-07-21 22:19:52,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:52" (1/1) ... [2020-07-21 22:19:53,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:52" (1/1) ... [2020-07-21 22:19:53,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:52" (1/1) ... [2020-07-21 22:19:53,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:19:53,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:19:53,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:19:53,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:19:53,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:19:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:19:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:19:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 22:19:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 22:19:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:19:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:19:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:19:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 22:19:53,073 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 22:19:53,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:19:53,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:19:53,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:19:53,275 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:19:53,275 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:19:53,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:19:53 BoogieIcfgContainer [2020-07-21 22:19:53,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:19:53,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:19:53,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:19:53,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:19:53,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:19:52" (1/3) ... [2020-07-21 22:19:53,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437bd974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:19:53, skipping insertion in model container [2020-07-21 22:19:53,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:19:52" (2/3) ... [2020-07-21 22:19:53,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437bd974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:19:53, skipping insertion in model container [2020-07-21 22:19:53,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:19:53" (3/3) ... [2020-07-21 22:19:53,291 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2020-07-21 22:19:53,303 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:19:53,312 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:19:53,351 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:19:53,410 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:19:53,411 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:19:53,411 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:19:53,411 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:19:53,411 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:19:53,411 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:19:53,412 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:19:53,412 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:19:53,435 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 22:19:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:19:53,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:53,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:53,442 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:53,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:53,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 22:19:53,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:53,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036358013] [2020-07-21 22:19:53,455 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 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:53,518 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:53,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:53,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:19:53,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:19:53,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:19:53,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036358013] [2020-07-21 22:19:53,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:19:53,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:19:53,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239569216] [2020-07-21 22:19:53,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:19:53,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:53,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:19:53,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:19:53,632 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 22:19:53,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:53,742 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 22:19:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:19:53,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:19:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:53,759 INFO L225 Difference]: With dead ends: 44 [2020-07-21 22:19:53,760 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:19:53,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:19:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:19:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:19:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:19:53,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:19:53,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 22:19:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:53,813 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:19:53,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:19:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:19:53,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:19:53,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:53,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:54,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:54,030 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:54,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:54,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 22:19:54,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:54,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109540699] [2020-07-21 22:19:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:19:54,059 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:19:54,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:54,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:19:54,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:19:54,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:19:54,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109540699] [2020-07-21 22:19:54,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:19:54,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:19:54,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407845617] [2020-07-21 22:19:54,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:19:54,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:54,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:19:54,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:19:54,107 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 22:19:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:54,204 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 22:19:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:19:54,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:19:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:54,212 INFO L225 Difference]: With dead ends: 36 [2020-07-21 22:19:54,212 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 22:19:54,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:19:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 22:19:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 22:19:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:19:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:19:54,228 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 22:19:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:54,229 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:19:54,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:19:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:19:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:19:54,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:54,231 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:54,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:54,447 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:54,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 22:19:54,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:54,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996462643] [2020-07-21 22:19:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:19:54,482 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:54,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:54,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:19:54,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:19:54,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:54,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:54,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:19:54,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996462643] [2020-07-21 22:19:54,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:54,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:19:54,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55778998] [2020-07-21 22:19:54,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:19:54,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:54,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:19:54,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:19:54,862 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 22:19:54,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:54,986 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 22:19:54,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:19:54,987 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 22:19:54,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:54,989 INFO L225 Difference]: With dead ends: 41 [2020-07-21 22:19:54,989 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 22:19:54,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:19:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 22:19:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 22:19:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:19:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:19:55,000 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 22:19:55,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:55,001 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:19:55,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:19:55,001 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:19:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:19:55,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:55,003 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:55,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:55,216 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 22:19:55,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:55,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50113484] [2020-07-21 22:19:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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) [2020-07-21 22:19:55,245 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:55,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:55,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:19:55,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:19:55,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:55,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:55,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:19:55,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50113484] [2020-07-21 22:19:55,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:55,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:19:55,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251645932] [2020-07-21 22:19:55,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:19:55,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:55,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:19:55,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:19:55,466 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 22:19:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:55,618 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 22:19:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:19:55,619 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 22:19:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:55,624 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:19:55,624 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:19:55,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:19:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:19:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 22:19:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:19:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:19:55,646 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 22:19:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:55,647 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:19:55,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:19:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:19:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:19:55,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:55,654 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:55,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:55,869 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:55,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:55,869 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 22:19:55,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:55,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458649974] [2020-07-21 22:19:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:19:55,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:55,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:55,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:19:55,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:19:55,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:56,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:56,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:56,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:19:56,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458649974] [2020-07-21 22:19:56,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:56,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:19:56,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954486704] [2020-07-21 22:19:56,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:19:56,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:56,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:19:56,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:19:56,400 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 22:19:56,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:56,614 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 22:19:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:19:56,614 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 22:19:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:56,617 INFO L225 Difference]: With dead ends: 51 [2020-07-21 22:19:56,617 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 22:19:56,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:19:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 22:19:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 22:19:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:19:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:19:56,630 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 22:19:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:56,630 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:19:56,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:19:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:19:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 22:19:56,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:56,633 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:56,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:56,847 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:56,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 22:19:56,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:56,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460406872] [2020-07-21 22:19:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:19:56,879 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:56,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:56,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:19:56,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:19:56,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:57,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:57,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:57,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:19:57,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460406872] [2020-07-21 22:19:57,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:57,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:19:57,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724194417] [2020-07-21 22:19:57,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:19:57,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:57,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:19:57,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:19:57,261 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 22:19:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:57,435 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 22:19:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:19:57,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 22:19:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:57,440 INFO L225 Difference]: With dead ends: 56 [2020-07-21 22:19:57,440 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 22:19:57,447 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 [2020-07-21 22:19:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 22:19:57,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 22:19:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:19:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:19:57,471 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 22:19:57,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:57,472 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:19:57,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:19:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:19:57,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:19:57,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:57,485 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] [2020-07-21 22:19:57,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:57,686 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:57,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:57,686 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 22:19:57,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:57,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223073606] [2020-07-21 22:19:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:19:57,721 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:57,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:57,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:19:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 22:19:57,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:58,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:58,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:58,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:58,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:19:58,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223073606] [2020-07-21 22:19:58,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:58,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:19:58,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564306634] [2020-07-21 22:19:58,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:19:58,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:58,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:19:58,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:19:58,401 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 22:19:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:58,617 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 22:19:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:58,618 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 22:19:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:58,621 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:19:58,621 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 22:19:58,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:19:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 22:19:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 22:19:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:19:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:19:58,640 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 22:19:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:58,641 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:19:58,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:19:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:19:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 22:19:58,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:58,644 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] [2020-07-21 22:19:58,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:58,859 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:58,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:58,860 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 22:19:58,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:58,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506404062] [2020-07-21 22:19:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:58,898 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:58,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:58,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:19:58,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 22:19:58,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:59,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:59,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:59,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:59,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:59,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:19:59,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506404062] [2020-07-21 22:19:59,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:59,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:19:59,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115129967] [2020-07-21 22:19:59,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:19:59,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:59,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:19:59,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:19:59,554 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 22:19:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:59,769 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 22:19:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:59,770 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 22:19:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:59,772 INFO L225 Difference]: With dead ends: 66 [2020-07-21 22:19:59,772 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 22:19:59,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:19:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 22:19:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 22:19:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:19:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:19:59,785 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 22:19:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:59,785 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:19:59,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:19:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:19:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 22:19:59,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:59,788 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] [2020-07-21 22:20:00,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:00,003 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:00,004 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 22:20:00,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:00,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159196150] [2020-07-21 22:20:00,006 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:00,057 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:00,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:00,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:20:00,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 22:20:00,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:00,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:00,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:00,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 22:20:01,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159196150] [2020-07-21 22:20:01,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:01,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:20:01,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499446111] [2020-07-21 22:20:01,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:20:01,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:01,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:20:01,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:20:01,127 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 22:20:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:01,402 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 22:20:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:20:01,402 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 22:20:01,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:01,404 INFO L225 Difference]: With dead ends: 71 [2020-07-21 22:20:01,404 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 22:20:01,406 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 [2020-07-21 22:20:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 22:20:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 22:20:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:20:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:20:01,418 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 22:20:01,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:01,418 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:20:01,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:20:01,419 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:20:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 22:20:01,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:01,421 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] [2020-07-21 22:20:01,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:01,635 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 22:20:01,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:01,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007546425] [2020-07-21 22:20:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:01,685 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:01,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:20:01,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 22:20:01,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:02,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:02,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:02,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:02,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 22:20:02,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007546425] [2020-07-21 22:20:02,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:02,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:20:02,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270669415] [2020-07-21 22:20:02,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:20:02,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:02,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:20:02,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:20:02,768 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 22:20:03,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:03,046 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 22:20:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:20:03,047 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 22:20:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:03,048 INFO L225 Difference]: With dead ends: 76 [2020-07-21 22:20:03,049 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:20:03,051 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 [2020-07-21 22:20:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:20:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 22:20:03,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:20:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:20:03,084 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 22:20:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:03,084 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:20:03,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:20:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:20:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 22:20:03,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:03,091 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] [2020-07-21 22:20:03,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:03,292 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:03,293 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 22:20:03,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:03,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113637917] [2020-07-21 22:20:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:03,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:03,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:03,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:03,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 22:20:03,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:04,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:04,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:04,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:05,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:05,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:05,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:05,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:05,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 22:20:05,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113637917] [2020-07-21 22:20:05,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:05,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:20:05,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974916437] [2020-07-21 22:20:05,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:20:05,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:05,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:20:05,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:20:05,337 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 22:20:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:05,639 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 22:20:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:20:05,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 22:20:05,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:05,643 INFO L225 Difference]: With dead ends: 81 [2020-07-21 22:20:05,644 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 22:20:05,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:20:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 22:20:05,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 22:20:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:20:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:20:05,657 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 22:20:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:05,658 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:20:05,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:20:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:20:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:20:05,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:05,661 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] [2020-07-21 22:20:05,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:05,867 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:05,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:05,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 22:20:05,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:05,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518501848] [2020-07-21 22:20:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:05,936 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:05,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:05,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:05,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 22:20:06,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:06,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:07,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:07,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:07,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:07,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:07,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:07,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 22:20:07,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518501848] [2020-07-21 22:20:07,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:07,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:20:07,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241946758] [2020-07-21 22:20:07,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:20:07,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:07,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:20:07,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:20:07,584 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 22:20:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:07,897 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 22:20:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:20:07,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 22:20:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:07,901 INFO L225 Difference]: With dead ends: 86 [2020-07-21 22:20:07,901 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 22:20:07,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:20:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 22:20:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 22:20:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:20:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:20:07,916 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 22:20:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:07,917 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:20:07,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:20:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:20:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 22:20:07,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:07,920 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] [2020-07-21 22:20:08,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:08,132 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:08,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 22:20:08,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:08,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731386674] [2020-07-21 22:20:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:08,218 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:08,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:08,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:20:08,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 22:20:08,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:09,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:09,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:10,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:10,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:10,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:10,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:10,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:10,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:10,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:10,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:10,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 22:20:10,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731386674] [2020-07-21 22:20:10,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:10,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:20:10,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870142537] [2020-07-21 22:20:10,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:20:10,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:10,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:20:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:20:10,840 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 22:20:11,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:11,281 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 22:20:11,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:20:11,282 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 22:20:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:11,285 INFO L225 Difference]: With dead ends: 91 [2020-07-21 22:20:11,285 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 22:20:11,287 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 [2020-07-21 22:20:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 22:20:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 22:20:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:20:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:20:11,298 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 22:20:11,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:11,299 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:20:11,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:20:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:20:11,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 22:20:11,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:11,302 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] [2020-07-21 22:20:11,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:11,516 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:11,517 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 22:20:11,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:11,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383611848] [2020-07-21 22:20:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:11,619 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:11,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:11,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:20:11,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 22:20:11,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:13,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:13,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:13,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:13,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:14,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:14,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:14,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:14,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 22:20:14,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383611848] [2020-07-21 22:20:14,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:14,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:20:14,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344715718] [2020-07-21 22:20:14,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:20:14,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:14,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:20:14,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:20:14,220 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 19 states. [2020-07-21 22:20:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:14,605 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 22:20:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:20:14,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-21 22:20:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:14,609 INFO L225 Difference]: With dead ends: 96 [2020-07-21 22:20:14,609 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 22:20:14,610 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 [2020-07-21 22:20:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 22:20:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 22:20:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:20:14,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:20:14,623 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 22:20:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:14,624 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:20:14,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:20:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:20:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 22:20:14,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:14,631 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] [2020-07-21 22:20:14,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:14,846 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:14,847 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 22:20:14,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:14,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140569184] [2020-07-21 22:20:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:14,988 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:14,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:14,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:20:14,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 22:20:15,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:17,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:17,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:18,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:18,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:18,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:18,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:18,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:18,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:18,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:18,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:19,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 22:20:19,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140569184] [2020-07-21 22:20:19,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:19,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:20:19,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600121446] [2020-07-21 22:20:19,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:20:19,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:19,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:20:19,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:20:19,154 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 21 states. [2020-07-21 22:20:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:19,716 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 22:20:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:20:19,717 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-07-21 22:20:19,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:19,723 INFO L225 Difference]: With dead ends: 101 [2020-07-21 22:20:19,724 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 22:20:19,725 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 [2020-07-21 22:20:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 22:20:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 22:20:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:20:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:20:19,746 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 22:20:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:19,747 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:20:19,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:20:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:20:19,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-07-21 22:20:19,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:19,752 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] [2020-07-21 22:20:19,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:19,966 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:19,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1494010988, now seen corresponding path program 3 times [2020-07-21 22:20:19,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:19,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899583172] [2020-07-21 22:20:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:20,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:20,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:20,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:20:20,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 533 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-21 22:20:20,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:21,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:21,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:22,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:22,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:22,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:22,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 554 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2020-07-21 22:20:23,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899583172] [2020-07-21 22:20:23,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:23,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:20:23,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435616583] [2020-07-21 22:20:23,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:20:23,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:23,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:20:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:20:23,478 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 19 states. [2020-07-21 22:20:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:23,859 INFO L93 Difference]: Finished difference Result 129 states and 362 transitions. [2020-07-21 22:20:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:20:23,860 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 297 [2020-07-21 22:20:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:23,864 INFO L225 Difference]: With dead ends: 129 [2020-07-21 22:20:23,864 INFO L226 Difference]: Without dead ends: 125 [2020-07-21 22:20:23,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:20:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-21 22:20:23,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2020-07-21 22:20:23,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 22:20:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 120 transitions. [2020-07-21 22:20:23,894 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 120 transitions. Word has length 297 [2020-07-21 22:20:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:23,896 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 120 transitions. [2020-07-21 22:20:23,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:20:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 120 transitions. [2020-07-21 22:20:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 22:20:23,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:23,900 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] [2020-07-21 22:20:24,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:24,113 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:24,113 INFO L82 PathProgramCache]: Analyzing trace with hash -948476032, now seen corresponding path program 1 times [2020-07-21 22:20:24,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:24,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496062012] [2020-07-21 22:20:24,114 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:24,305 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:24,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:24,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 707 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-21 22:20:24,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:26,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:26,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:26,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:26,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:26,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:27,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 723 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-21 22:20:27,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496062012] [2020-07-21 22:20:27,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:27,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:20:27,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910979520] [2020-07-21 22:20:27,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:20:27,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:27,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:20:27,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:20:27,143 INFO L87 Difference]: Start difference. First operand 67 states and 120 transitions. Second operand 17 states. [2020-07-21 22:20:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:27,502 INFO L93 Difference]: Finished difference Result 139 states and 413 transitions. [2020-07-21 22:20:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:20:27,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-21 22:20:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:27,507 INFO L225 Difference]: With dead ends: 139 [2020-07-21 22:20:27,507 INFO L226 Difference]: Without dead ends: 135 [2020-07-21 22:20:27,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 790 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:20:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-21 22:20:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-07-21 22:20:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 22:20:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 127 transitions. [2020-07-21 22:20:27,525 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 127 transitions. Word has length 409 [2020-07-21 22:20:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:27,526 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 127 transitions. [2020-07-21 22:20:27,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:20:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 127 transitions. [2020-07-21 22:20:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-21 22:20:27,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:27,530 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] [2020-07-21 22:20:27,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:27,745 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:27,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1385064961, now seen corresponding path program 1 times [2020-07-21 22:20:27,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:27,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563443423] [2020-07-21 22:20:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:27,974 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:27,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:27,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:20:27,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 323 proven. 1219 refuted. 0 times theorem prover too weak. 6689 trivial. 0 not checked. [2020-07-21 22:20:28,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:30,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:31,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:32,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:32,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:32,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:32,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:32,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:32,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:32,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 327 proven. 1245 refuted. 0 times theorem prover too weak. 6659 trivial. 0 not checked. [2020-07-21 22:20:33,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563443423] [2020-07-21 22:20:33,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:33,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:20:33,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453247483] [2020-07-21 22:20:33,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:20:33,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:33,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:20:33,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:20:33,066 INFO L87 Difference]: Start difference. First operand 69 states and 127 transitions. Second operand 21 states. [2020-07-21 22:20:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:33,693 INFO L93 Difference]: Finished difference Result 166 states and 566 transitions. [2020-07-21 22:20:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:20:33,694 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 531 [2020-07-21 22:20:33,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:33,696 INFO L225 Difference]: With dead ends: 166 [2020-07-21 22:20:33,697 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 22:20:33,700 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 [2020-07-21 22:20:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 22:20:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-21 22:20:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 22:20:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2020-07-21 22:20:33,714 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 531 [2020-07-21 22:20:33,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:33,715 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2020-07-21 22:20:33,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:20:33,715 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2020-07-21 22:20:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-21 22:20:33,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:33,720 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 25, 24, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:33,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:33,935 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1214630406, now seen corresponding path program 2 times [2020-07-21 22:20:33,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:33,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564044852] [2020-07-21 22:20:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:34,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:34,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:34,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:20:34,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 884 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2020-07-21 22:20:34,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:36,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:36,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:36,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 905 refuted. 0 times theorem prover too weak. 4819 trivial. 0 not checked. [2020-07-21 22:20:37,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564044852] [2020-07-21 22:20:37,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:37,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:20:37,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859638506] [2020-07-21 22:20:37,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:20:37,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:37,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:20:37,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:20:37,921 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand 19 states. [2020-07-21 22:20:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:38,383 INFO L93 Difference]: Finished difference Result 167 states and 414 transitions. [2020-07-21 22:20:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:20:38,384 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 458 [2020-07-21 22:20:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:38,389 INFO L225 Difference]: With dead ends: 167 [2020-07-21 22:20:38,389 INFO L226 Difference]: Without dead ends: 153 [2020-07-21 22:20:38,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 883 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:20:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-21 22:20:38,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2020-07-21 22:20:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 22:20:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 160 transitions. [2020-07-21 22:20:38,407 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 160 transitions. Word has length 458 [2020-07-21 22:20:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:38,408 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 160 transitions. [2020-07-21 22:20:38,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:20:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 160 transitions. [2020-07-21 22:20:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-21 22:20:38,412 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:38,412 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 25, 23, 19, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:38,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:38,626 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:38,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:38,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1610364731, now seen corresponding path program 3 times [2020-07-21 22:20:38,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:38,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765454596] [2020-07-21 22:20:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:38,880 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:38,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:38,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:20:38,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 283 proven. 715 refuted. 0 times theorem prover too weak. 2766 trivial. 0 not checked. [2020-07-21 22:20:39,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:41,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:41,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:43,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:43,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:43,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:43,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:43,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:43,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:43,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 285 proven. 743 refuted. 0 times theorem prover too weak. 2736 trivial. 0 not checked. [2020-07-21 22:20:43,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765454596] [2020-07-21 22:20:43,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:43,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:20:43,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615849930] [2020-07-21 22:20:43,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:20:43,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:43,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:20:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:20:43,533 INFO L87 Difference]: Start difference. First operand 94 states and 160 transitions. Second operand 21 states. [2020-07-21 22:20:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:44,215 INFO L93 Difference]: Finished difference Result 191 states and 508 transitions. [2020-07-21 22:20:44,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:20:44,216 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 367 [2020-07-21 22:20:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:44,219 INFO L225 Difference]: With dead ends: 191 [2020-07-21 22:20:44,219 INFO L226 Difference]: Without dead ends: 105 [2020-07-21 22:20:44,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 697 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:20:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-21 22:20:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-07-21 22:20:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 22:20:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 171 transitions. [2020-07-21 22:20:44,233 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 171 transitions. Word has length 367 [2020-07-21 22:20:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:44,234 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 171 transitions. [2020-07-21 22:20:44,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:20:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 171 transitions. [2020-07-21 22:20:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-07-21 22:20:44,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:44,238 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] [2020-07-21 22:20:44,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:44,454 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:44,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:44,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1244348522, now seen corresponding path program 4 times [2020-07-21 22:20:44,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:44,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66526921] [2020-07-21 22:20:44,455 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:44,736 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:44,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:44,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:44,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 224 proven. 703 refuted. 0 times theorem prover too weak. 4401 trivial. 0 not checked. [2020-07-21 22:20:44,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:46,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:46,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:46,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:47,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:47,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:47,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:47,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:47,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:47,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 224 proven. 719 refuted. 0 times theorem prover too weak. 4385 trivial. 0 not checked. [2020-07-21 22:20:47,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66526921] [2020-07-21 22:20:47,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:47,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:20:47,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474463822] [2020-07-21 22:20:47,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:20:47,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:47,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:20:47,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:20:47,543 INFO L87 Difference]: Start difference. First operand 99 states and 171 transitions. Second operand 17 states. [2020-07-21 22:20:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:47,836 INFO L93 Difference]: Finished difference Result 178 states and 428 transitions. [2020-07-21 22:20:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:20:47,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 433 [2020-07-21 22:20:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:47,841 INFO L225 Difference]: With dead ends: 178 [2020-07-21 22:20:47,842 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 22:20:47,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 837 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:20:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 22:20:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2020-07-21 22:20:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 22:20:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 192 transitions. [2020-07-21 22:20:47,860 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 192 transitions. Word has length 433 [2020-07-21 22:20:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:47,860 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 192 transitions. [2020-07-21 22:20:47,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:20:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 192 transitions. [2020-07-21 22:20:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-21 22:20:47,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:47,864 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 26, 26, 21, 19, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 10, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:48,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:48,079 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:48,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:48,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1491928495, now seen corresponding path program 5 times [2020-07-21 22:20:48,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:48,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838141309] [2020-07-21 22:20:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:48,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:48,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:20:48,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4273 backedges. 222 proven. 711 refuted. 0 times theorem prover too weak. 3340 trivial. 0 not checked. [2020-07-21 22:20:48,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:50,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:50,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:50,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:50,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4273 backedges. 224 proven. 730 refuted. 0 times theorem prover too weak. 3319 trivial. 0 not checked. [2020-07-21 22:20:51,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838141309] [2020-07-21 22:20:51,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:51,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:20:51,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52105011] [2020-07-21 22:20:51,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:20:51,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:51,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:20:51,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:20:51,796 INFO L87 Difference]: Start difference. First operand 106 states and 192 transitions. Second operand 19 states. [2020-07-21 22:20:52,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:52,119 INFO L93 Difference]: Finished difference Result 172 states and 408 transitions. [2020-07-21 22:20:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:20:52,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 389 [2020-07-21 22:20:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:52,132 INFO L225 Difference]: With dead ends: 172 [2020-07-21 22:20:52,132 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 22:20:52,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 745 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:20:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 22:20:52,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2020-07-21 22:20:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 22:20:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 22:20:52,153 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 389 [2020-07-21 22:20:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:52,154 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 22:20:52,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:20:52,154 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 22:20:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-07-21 22:20:52,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:52,157 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 22, 22, 20, 16, 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] [2020-07-21 22:20:52,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:52,371 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:52,372 INFO L82 PathProgramCache]: Analyzing trace with hash -870783652, now seen corresponding path program 6 times [2020-07-21 22:20:52,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:52,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357030875] [2020-07-21 22:20:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:52,675 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:52,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:52,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:52,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 188 proven. 460 refuted. 0 times theorem prover too weak. 2270 trivial. 0 not checked. [2020-07-21 22:20:52,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:54,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:54,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:54,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:54,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:54,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:54,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:54,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:54,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 188 proven. 474 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2020-07-21 22:20:55,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357030875] [2020-07-21 22:20:55,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:55,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:20:55,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145595786] [2020-07-21 22:20:55,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:20:55,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:55,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:20:55,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:20:55,100 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-21 22:20:55,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:55,420 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2020-07-21 22:20:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:20:55,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 325 [2020-07-21 22:20:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:55,424 INFO L225 Difference]: With dead ends: 190 [2020-07-21 22:20:55,424 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 22:20:55,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 621 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:20:55,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 22:20:55,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2020-07-21 22:20:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 22:20:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 22:20:55,443 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 325 [2020-07-21 22:20:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:55,444 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 22:20:55,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:20:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 22:20:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-21 22:20:55,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:55,448 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 23, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:55,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:55,661 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:55,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:55,662 INFO L82 PathProgramCache]: Analyzing trace with hash -954190270, now seen corresponding path program 7 times [2020-07-21 22:20:55,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:55,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337171889] [2020-07-21 22:20:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:56,001 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:56,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:56,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:56,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 259 proven. 599 refuted. 0 times theorem prover too weak. 3774 trivial. 0 not checked. [2020-07-21 22:20:56,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:57,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 261 proven. 613 refuted. 0 times theorem prover too weak. 3758 trivial. 0 not checked. [2020-07-21 22:20:58,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337171889] [2020-07-21 22:20:58,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:58,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:20:58,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096606905] [2020-07-21 22:20:58,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:20:58,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:58,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:20:58,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:20:58,940 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-21 22:20:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:59,360 INFO L93 Difference]: Finished difference Result 156 states and 320 transitions. [2020-07-21 22:20:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:20:59,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 406 [2020-07-21 22:20:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:59,364 INFO L225 Difference]: With dead ends: 156 [2020-07-21 22:20:59,364 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 22:20:59,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 783 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:20:59,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 22:20:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2020-07-21 22:20:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 22:20:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 230 transitions. [2020-07-21 22:20:59,380 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 230 transitions. Word has length 406 [2020-07-21 22:20:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:59,381 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 230 transitions. [2020-07-21 22:20:59,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:20:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 230 transitions. [2020-07-21 22:20:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-21 22:20:59,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:59,386 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 34, 27, 26, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 14, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:59,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:59,600 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1440475136, now seen corresponding path program 8 times [2020-07-21 22:20:59,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:59,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338462449] [2020-07-21 22:20:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:20:59,957 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:59,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:59,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:20:59,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7504 backedges. 328 proven. 944 refuted. 0 times theorem prover too weak. 6232 trivial. 0 not checked. [2020-07-21 22:21:00,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:02,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:03,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:03,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:03,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:03,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:03,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:03,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:03,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7504 backedges. 330 proven. 963 refuted. 0 times theorem prover too weak. 6211 trivial. 0 not checked. [2020-07-21 22:21:04,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338462449] [2020-07-21 22:21:04,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:04,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:21:04,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177517077] [2020-07-21 22:21:04,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:21:04,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:04,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:21:04,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:21:04,382 INFO L87 Difference]: Start difference. First operand 121 states and 230 transitions. Second operand 19 states. [2020-07-21 22:21:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:04,940 INFO L93 Difference]: Finished difference Result 159 states and 322 transitions. [2020-07-21 22:21:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:21:04,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 510 [2020-07-21 22:21:04,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:04,944 INFO L225 Difference]: With dead ends: 159 [2020-07-21 22:21:04,944 INFO L226 Difference]: Without dead ends: 150 [2020-07-21 22:21:04,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 987 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:21:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-21 22:21:04,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 120. [2020-07-21 22:21:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-21 22:21:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 218 transitions. [2020-07-21 22:21:04,961 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 218 transitions. Word has length 510 [2020-07-21 22:21:04,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:04,961 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 218 transitions. [2020-07-21 22:21:04,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:21:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 218 transitions. [2020-07-21 22:21:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-21 22:21:04,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:04,967 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 25, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:05,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:05,182 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:05,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2126389129, now seen corresponding path program 9 times [2020-07-21 22:21:05,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:05,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859538078] [2020-07-21 22:21:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:21:05,543 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:05,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:05,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:21:05,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 294 proven. 639 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2020-07-21 22:21:05,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:07,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:07,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 294 proven. 655 refuted. 0 times theorem prover too weak. 4707 trivial. 0 not checked. [2020-07-21 22:21:08,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859538078] [2020-07-21 22:21:08,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:08,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:21:08,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992473584] [2020-07-21 22:21:08,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:21:08,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:08,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:21:08,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:21:08,876 INFO L87 Difference]: Start difference. First operand 120 states and 218 transitions. Second operand 17 states. [2020-07-21 22:21:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:09,232 INFO L93 Difference]: Finished difference Result 171 states and 354 transitions. [2020-07-21 22:21:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:09,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 447 [2020-07-21 22:21:09,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:09,237 INFO L225 Difference]: With dead ends: 171 [2020-07-21 22:21:09,237 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 22:21:09,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 865 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:21:09,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 22:21:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-07-21 22:21:09,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-21 22:21:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 206 transitions. [2020-07-21 22:21:09,254 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 206 transitions. Word has length 447 [2020-07-21 22:21:09,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:09,254 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 206 transitions. [2020-07-21 22:21:09,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:21:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 206 transitions. [2020-07-21 22:21:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-21 22:21:09,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:09,259 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] [2020-07-21 22:21:09,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:09,475 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash 280776720, now seen corresponding path program 10 times [2020-07-21 22:21:09,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:09,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202685957] [2020-07-21 22:21:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:21:09,880 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:09,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:09,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:21:09,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 266 proven. 517 refuted. 0 times theorem prover too weak. 4594 trivial. 0 not checked. [2020-07-21 22:21:10,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:11,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 266 proven. 527 refuted. 0 times theorem prover too weak. 4584 trivial. 0 not checked. [2020-07-21 22:21:12,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202685957] [2020-07-21 22:21:12,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:12,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:21:12,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867982767] [2020-07-21 22:21:12,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:21:12,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:12,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:21:12,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:21:12,621 INFO L87 Difference]: Start difference. First operand 114 states and 206 transitions. Second operand 15 states. [2020-07-21 22:21:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:12,935 INFO L93 Difference]: Finished difference Result 196 states and 493 transitions. [2020-07-21 22:21:12,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:21:12,936 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 436 [2020-07-21 22:21:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:12,940 INFO L225 Difference]: With dead ends: 196 [2020-07-21 22:21:12,940 INFO L226 Difference]: Without dead ends: 187 [2020-07-21 22:21:12,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 847 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:21:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-21 22:21:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 116. [2020-07-21 22:21:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 22:21:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 214 transitions. [2020-07-21 22:21:12,961 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 214 transitions. Word has length 436 [2020-07-21 22:21:12,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:12,961 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 214 transitions. [2020-07-21 22:21:12,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:21:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 214 transitions. [2020-07-21 22:21:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-21 22:21:12,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:12,966 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 29, 24, 23, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 10, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:13,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:13,181 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:13,181 INFO L82 PathProgramCache]: Analyzing trace with hash 500483827, now seen corresponding path program 11 times [2020-07-21 22:21:13,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:13,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962230279] [2020-07-21 22:21:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:13,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:13,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:13,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:21:13,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 296 proven. 579 refuted. 0 times theorem prover too weak. 4106 trivial. 0 not checked. [2020-07-21 22:21:13,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:15,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 298 proven. 591 refuted. 0 times theorem prover too weak. 4092 trivial. 0 not checked. [2020-07-21 22:21:16,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962230279] [2020-07-21 22:21:16,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:16,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:21:16,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048252884] [2020-07-21 22:21:16,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:21:16,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:16,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:21:16,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:21:16,876 INFO L87 Difference]: Start difference. First operand 116 states and 214 transitions. Second operand 17 states. [2020-07-21 22:21:17,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:17,200 INFO L93 Difference]: Finished difference Result 149 states and 292 transitions. [2020-07-21 22:21:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:17,202 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 420 [2020-07-21 22:21:17,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:17,205 INFO L225 Difference]: With dead ends: 149 [2020-07-21 22:21:17,206 INFO L226 Difference]: Without dead ends: 140 [2020-07-21 22:21:17,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 811 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:21:17,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-21 22:21:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-07-21 22:21:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-21 22:21:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 206 transitions. [2020-07-21 22:21:17,220 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 206 transitions. Word has length 420 [2020-07-21 22:21:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:17,220 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 206 transitions. [2020-07-21 22:21:17,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:21:17,221 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 206 transitions. [2020-07-21 22:21:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-21 22:21:17,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:17,225 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 27, 27, 23, 23, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 10, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:17,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:17,440 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:17,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:17,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2107510849, now seen corresponding path program 12 times [2020-07-21 22:21:17,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:17,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476874501] [2020-07-21 22:21:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:21:17,844 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:21:17,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:17,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:21:17,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 396 proven. 439 refuted. 0 times theorem prover too weak. 3547 trivial. 0 not checked. [2020-07-21 22:21:18,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:19,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:20,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:20,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:20,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:20,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:20,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:20,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:20,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 398 proven. 453 refuted. 0 times theorem prover too weak. 3531 trivial. 0 not checked. [2020-07-21 22:21:21,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476874501] [2020-07-21 22:21:21,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:21,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:21:21,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093440417] [2020-07-21 22:21:21,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:21:21,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:21,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:21:21,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:21:21,029 INFO L87 Difference]: Start difference. First operand 114 states and 206 transitions. Second operand 17 states. [2020-07-21 22:21:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:21,449 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2020-07-21 22:21:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:21,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 395 [2020-07-21 22:21:21,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:21,454 INFO L225 Difference]: With dead ends: 166 [2020-07-21 22:21:21,454 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 22:21:21,456 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 [2020-07-21 22:21:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 22:21:21,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 134. [2020-07-21 22:21:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 22:21:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 269 transitions. [2020-07-21 22:21:21,475 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 269 transitions. Word has length 395 [2020-07-21 22:21:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:21,476 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 269 transitions. [2020-07-21 22:21:21,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:21:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 269 transitions. [2020-07-21 22:21:21,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-07-21 22:21:21,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:21,481 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 23, 23, 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] [2020-07-21 22:21:21,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:21,696 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:21,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2032204086, now seen corresponding path program 13 times [2020-07-21 22:21:21,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:21,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106023388] [2020-07-21 22:21:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:21:22,124 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:22,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:21:22,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5258 backedges. 431 proven. 767 refuted. 0 times theorem prover too weak. 4060 trivial. 0 not checked. [2020-07-21 22:21:22,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:24,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:24,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:26,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:26,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:26,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:26,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:26,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:27,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:27,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:27,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:27,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5258 backedges. 433 proven. 795 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2020-07-21 22:21:27,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106023388] [2020-07-21 22:21:27,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:27,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:21:27,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494056313] [2020-07-21 22:21:27,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:21:27,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:21:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:21:27,574 INFO L87 Difference]: Start difference. First operand 134 states and 269 transitions. Second operand 21 states. [2020-07-21 22:21:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:28,382 INFO L93 Difference]: Finished difference Result 178 states and 380 transitions. [2020-07-21 22:21:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:21:28,384 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 431 [2020-07-21 22:21:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:28,387 INFO L225 Difference]: With dead ends: 178 [2020-07-21 22:21:28,388 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 22:21:28,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 825 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:21:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 22:21:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-07-21 22:21:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 22:21:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 278 transitions. [2020-07-21 22:21:28,417 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 278 transitions. Word has length 431 [2020-07-21 22:21:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:28,418 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 278 transitions. [2020-07-21 22:21:28,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:21:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 278 transitions. [2020-07-21 22:21:28,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-07-21 22:21:28,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:28,428 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 25, 23, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:28,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:28,644 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:28,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1285162429, now seen corresponding path program 14 times [2020-07-21 22:21:28,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:28,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259980346] [2020-07-21 22:21:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:21:29,038 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:29,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:29,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:29,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5609 backedges. 474 proven. 609 refuted. 0 times theorem prover too weak. 4526 trivial. 0 not checked. [2020-07-21 22:21:29,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:31,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:31,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:32,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:32,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:32,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:32,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:32,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:33,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:33,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:33,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5609 backedges. 478 proven. 626 refuted. 0 times theorem prover too weak. 4505 trivial. 0 not checked. [2020-07-21 22:21:33,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259980346] [2020-07-21 22:21:33,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:33,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:21:33,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954362176] [2020-07-21 22:21:33,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:21:33,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:33,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:21:33,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:21:33,651 INFO L87 Difference]: Start difference. First operand 142 states and 278 transitions. Second operand 19 states. [2020-07-21 22:21:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:34,132 INFO L93 Difference]: Finished difference Result 185 states and 395 transitions. [2020-07-21 22:21:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:21:34,134 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 445 [2020-07-21 22:21:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:34,137 INFO L225 Difference]: With dead ends: 185 [2020-07-21 22:21:34,137 INFO L226 Difference]: Without dead ends: 176 [2020-07-21 22:21:34,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 857 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:21:34,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-21 22:21:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 146. [2020-07-21 22:21:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-21 22:21:34,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 276 transitions. [2020-07-21 22:21:34,157 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 276 transitions. Word has length 445 [2020-07-21 22:21:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:34,158 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 276 transitions. [2020-07-21 22:21:34,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:21:34,158 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 276 transitions. [2020-07-21 22:21:34,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-07-21 22:21:34,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:34,164 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 25, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 11, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:34,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:34,379 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:34,380 INFO L82 PathProgramCache]: Analyzing trace with hash -989383496, now seen corresponding path program 15 times [2020-07-21 22:21:34,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:34,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23485436] [2020-07-21 22:21:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:34,837 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:21:34,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:34,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:21:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4687 backedges. 401 proven. 442 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2020-07-21 22:21:34,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:36,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4687 backedges. 403 proven. 454 refuted. 0 times theorem prover too weak. 3830 trivial. 0 not checked. [2020-07-21 22:21:38,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23485436] [2020-07-21 22:21:38,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:38,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:21:38,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766396081] [2020-07-21 22:21:38,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:21:38,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:38,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:21:38,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:21:38,167 INFO L87 Difference]: Start difference. First operand 146 states and 276 transitions. Second operand 17 states. [2020-07-21 22:21:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:38,565 INFO L93 Difference]: Finished difference Result 221 states and 492 transitions. [2020-07-21 22:21:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:38,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 408 [2020-07-21 22:21:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:38,571 INFO L225 Difference]: With dead ends: 221 [2020-07-21 22:21:38,572 INFO L226 Difference]: Without dead ends: 212 [2020-07-21 22:21:38,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 787 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:21:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-21 22:21:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 138. [2020-07-21 22:21:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-21 22:21:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 254 transitions. [2020-07-21 22:21:38,603 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 254 transitions. Word has length 408 [2020-07-21 22:21:38,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:38,604 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 254 transitions. [2020-07-21 22:21:38,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:21:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 254 transitions. [2020-07-21 22:21:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2020-07-21 22:21:38,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:38,614 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 36, 36, 30, 30, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 12, 11, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:38,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:38,828 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:38,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1935731646, now seen corresponding path program 16 times [2020-07-21 22:21:38,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:38,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164460830] [2020-07-21 22:21:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:21:39,292 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:39,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:39,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:21:39,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7650 backedges. 375 proven. 566 refuted. 0 times theorem prover too weak. 6709 trivial. 0 not checked. [2020-07-21 22:21:39,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:41,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:41,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:41,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:41,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:41,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:41,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7650 backedges. 375 proven. 578 refuted. 0 times theorem prover too weak. 6697 trivial. 0 not checked. [2020-07-21 22:21:42,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164460830] [2020-07-21 22:21:42,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:42,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:21:42,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182291050] [2020-07-21 22:21:42,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:21:42,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:42,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:21:42,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:21:42,652 INFO L87 Difference]: Start difference. First operand 138 states and 254 transitions. Second operand 15 states. [2020-07-21 22:21:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:43,085 INFO L93 Difference]: Finished difference Result 258 states and 656 transitions. [2020-07-21 22:21:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:21:43,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 517 [2020-07-21 22:21:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:43,095 INFO L225 Difference]: With dead ends: 258 [2020-07-21 22:21:43,095 INFO L226 Difference]: Without dead ends: 249 [2020-07-21 22:21:43,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1038 GetRequests, 1009 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:21:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-21 22:21:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 140. [2020-07-21 22:21:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 22:21:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 264 transitions. [2020-07-21 22:21:43,127 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 264 transitions. Word has length 517 [2020-07-21 22:21:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:43,128 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 264 transitions. [2020-07-21 22:21:43,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:21:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 264 transitions. [2020-07-21 22:21:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 22:21:43,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:43,133 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 30, 30, 27, 25, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:43,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:43,348 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:43,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:43,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1964691077, now seen corresponding path program 17 times [2020-07-21 22:21:43,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:43,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519574970] [2020-07-21 22:21:43,349 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:21:43,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:43,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:43,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:43,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 415 proven. 709 refuted. 0 times theorem prover too weak. 4611 trivial. 0 not checked. [2020-07-21 22:21:44,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:46,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:47,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:47,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:47,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:48,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:48,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:48,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:48,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:48,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:48,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 419 proven. 726 refuted. 0 times theorem prover too weak. 4590 trivial. 0 not checked. [2020-07-21 22:21:48,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519574970] [2020-07-21 22:21:48,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:48,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:21:48,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441184565] [2020-07-21 22:21:48,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:21:48,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:48,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:21:48,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:21:48,664 INFO L87 Difference]: Start difference. First operand 140 states and 264 transitions. Second operand 19 states. [2020-07-21 22:21:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:49,220 INFO L93 Difference]: Finished difference Result 203 states and 420 transitions. [2020-07-21 22:21:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:21:49,222 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 449 [2020-07-21 22:21:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:49,225 INFO L225 Difference]: With dead ends: 203 [2020-07-21 22:21:49,226 INFO L226 Difference]: Without dead ends: 172 [2020-07-21 22:21:49,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 865 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:21:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-21 22:21:49,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 154. [2020-07-21 22:21:49,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 22:21:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 306 transitions. [2020-07-21 22:21:49,245 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 306 transitions. Word has length 449 [2020-07-21 22:21:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:49,245 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 306 transitions. [2020-07-21 22:21:49,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:21:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 306 transitions. [2020-07-21 22:21:49,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2020-07-21 22:21:49,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:49,253 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 33, 32, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 12, 12, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:49,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:49,467 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:49,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2032739328, now seen corresponding path program 18 times [2020-07-21 22:21:49,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:49,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626964610] [2020-07-21 22:21:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:21:49,959 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:49,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:49,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:21:49,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9348 backedges. 462 proven. 763 refuted. 0 times theorem prover too weak. 8123 trivial. 0 not checked. [2020-07-21 22:21:50,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:52,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9348 backedges. 462 proven. 779 refuted. 0 times theorem prover too weak. 8107 trivial. 0 not checked. [2020-07-21 22:21:54,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626964610] [2020-07-21 22:21:54,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:54,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:21:54,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245309872] [2020-07-21 22:21:54,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:21:54,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:21:54,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:21:54,204 INFO L87 Difference]: Start difference. First operand 154 states and 306 transitions. Second operand 17 states. [2020-07-21 22:21:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:54,539 INFO L93 Difference]: Finished difference Result 206 states and 448 transitions. [2020-07-21 22:21:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:54,540 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 570 [2020-07-21 22:21:54,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:54,544 INFO L225 Difference]: With dead ends: 206 [2020-07-21 22:21:54,544 INFO L226 Difference]: Without dead ends: 197 [2020-07-21 22:21:54,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1145 GetRequests, 1111 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:21:54,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-07-21 22:21:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 149. [2020-07-21 22:21:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 22:21:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 288 transitions. [2020-07-21 22:21:54,562 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 288 transitions. Word has length 570 [2020-07-21 22:21:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:54,563 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 288 transitions. [2020-07-21 22:21:54,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:21:54,563 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 288 transitions. [2020-07-21 22:21:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2020-07-21 22:21:54,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:54,568 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 32, 31, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 13, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:54,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:54,769 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:54,769 INFO L82 PathProgramCache]: Analyzing trace with hash -779805700, now seen corresponding path program 19 times [2020-07-21 22:21:54,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:54,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319806602] [2020-07-21 22:21:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:21:55,283 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:55,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:55,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:21:55,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8489 backedges. 421 proven. 569 refuted. 0 times theorem prover too weak. 7499 trivial. 0 not checked. [2020-07-21 22:21:55,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:57,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:57,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:57,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:57,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8489 backedges. 423 proven. 577 refuted. 0 times theorem prover too weak. 7489 trivial. 0 not checked. [2020-07-21 22:21:58,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319806602] [2020-07-21 22:21:58,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:58,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:21:58,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010788806] [2020-07-21 22:21:58,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:21:58,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:58,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:21:58,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:21:58,692 INFO L87 Difference]: Start difference. First operand 149 states and 288 transitions. Second operand 15 states. [2020-07-21 22:21:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:58,948 INFO L93 Difference]: Finished difference Result 229 states and 543 transitions. [2020-07-21 22:21:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:21:58,948 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 544 [2020-07-21 22:21:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:58,952 INFO L225 Difference]: With dead ends: 229 [2020-07-21 22:21:58,952 INFO L226 Difference]: Without dead ends: 220 [2020-07-21 22:21:58,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1063 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:21:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-07-21 22:21:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 159. [2020-07-21 22:21:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-21 22:21:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 328 transitions. [2020-07-21 22:21:58,968 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 328 transitions. Word has length 544 [2020-07-21 22:21:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:58,969 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 328 transitions. [2020-07-21 22:21:58,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:21:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 328 transitions. [2020-07-21 22:21:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-07-21 22:21:58,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:58,973 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 25, 25, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:59,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:59,185 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:59,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:59,186 INFO L82 PathProgramCache]: Analyzing trace with hash -807697668, now seen corresponding path program 20 times [2020-07-21 22:21:59,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:59,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637433374] [2020-07-21 22:21:59,187 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:21:59,685 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:21:59,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:59,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:59,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5980 backedges. 577 proven. 557 refuted. 0 times theorem prover too weak. 4846 trivial. 0 not checked. [2020-07-21 22:21:59,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:02,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:02,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:02,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:02,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:02,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5980 backedges. 577 proven. 584 refuted. 0 times theorem prover too weak. 4819 trivial. 0 not checked. [2020-07-21 22:22:03,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637433374] [2020-07-21 22:22:03,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:03,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:22:03,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811468427] [2020-07-21 22:22:03,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:22:03,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:03,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:22:03,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:22:03,866 INFO L87 Difference]: Start difference. First operand 159 states and 328 transitions. Second operand 20 states. [2020-07-21 22:22:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:04,365 INFO L93 Difference]: Finished difference Result 280 states and 759 transitions. [2020-07-21 22:22:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:22:04,366 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 459 [2020-07-21 22:22:04,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:04,371 INFO L225 Difference]: With dead ends: 280 [2020-07-21 22:22:04,371 INFO L226 Difference]: Without dead ends: 262 [2020-07-21 22:22:04,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 885 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:22:04,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-21 22:22:04,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 207. [2020-07-21 22:22:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-21 22:22:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 494 transitions. [2020-07-21 22:22:04,440 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 494 transitions. Word has length 459 [2020-07-21 22:22:04,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:04,441 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 494 transitions. [2020-07-21 22:22:04,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:22:04,441 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 494 transitions. [2020-07-21 22:22:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 22:22:04,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:04,449 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 31, 31, 26, 26, 19, 19, 19, 19, 19, 19, 19, 15, 15, 15, 15, 15, 15, 15, 12, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:04,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:04,652 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash -915347413, now seen corresponding path program 21 times [2020-07-21 22:22:04,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:04,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487342171] [2020-07-21 22:22:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:22:05,153 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:22:05,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:05,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:22:05,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 267 proven. 904 refuted. 0 times theorem prover too weak. 5255 trivial. 0 not checked. [2020-07-21 22:22:05,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:07,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:07,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:08,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 275 proven. 917 refuted. 0 times theorem prover too weak. 5234 trivial. 0 not checked. [2020-07-21 22:22:10,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487342171] [2020-07-21 22:22:10,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:10,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:22:10,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076920176] [2020-07-21 22:22:10,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:22:10,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:10,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:22:10,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:22:10,047 INFO L87 Difference]: Start difference. First operand 207 states and 494 transitions. Second operand 19 states. [2020-07-21 22:22:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:10,785 INFO L93 Difference]: Finished difference Result 453 states and 1457 transitions. [2020-07-21 22:22:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:22:10,787 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 473 [2020-07-21 22:22:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:10,792 INFO L225 Difference]: With dead ends: 453 [2020-07-21 22:22:10,792 INFO L226 Difference]: Without dead ends: 255 [2020-07-21 22:22:10,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 913 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:22:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-21 22:22:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 204. [2020-07-21 22:22:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 22:22:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 463 transitions. [2020-07-21 22:22:10,829 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 463 transitions. Word has length 473 [2020-07-21 22:22:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:10,830 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 463 transitions. [2020-07-21 22:22:10,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:22:10,830 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 463 transitions. [2020-07-21 22:22:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 22:22:10,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:10,837 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 25, 24, 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] [2020-07-21 22:22:11,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:11,052 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash 33874401, now seen corresponding path program 22 times [2020-07-21 22:22:11,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:11,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201561061] [2020-07-21 22:22:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:22:11,541 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:22:11,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:11,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:22:11,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6300 backedges. 285 proven. 938 refuted. 0 times theorem prover too weak. 5077 trivial. 0 not checked. [2020-07-21 22:22:11,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:14,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:16,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:16,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:16,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:17,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:17,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:17,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:17,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:17,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6300 backedges. 286 proven. 958 refuted. 0 times theorem prover too weak. 5056 trivial. 0 not checked. [2020-07-21 22:22:17,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201561061] [2020-07-21 22:22:17,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:17,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 22:22:17,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616001545] [2020-07-21 22:22:17,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:22:17,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:17,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:22:17,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:22:17,828 INFO L87 Difference]: Start difference. First operand 204 states and 463 transitions. Second operand 21 states. [2020-07-21 22:22:18,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:18,519 INFO L93 Difference]: Finished difference Result 438 states and 1382 transitions. [2020-07-21 22:22:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:22:18,521 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 470 [2020-07-21 22:22:18,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:18,526 INFO L225 Difference]: With dead ends: 438 [2020-07-21 22:22:18,527 INFO L226 Difference]: Without dead ends: 232 [2020-07-21 22:22:18,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 946 GetRequests, 905 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:22:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-21 22:22:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2020-07-21 22:22:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 22:22:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 451 transitions. [2020-07-21 22:22:18,561 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 451 transitions. Word has length 470 [2020-07-21 22:22:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:18,562 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 451 transitions. [2020-07-21 22:22:18,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:22:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 451 transitions. [2020-07-21 22:22:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2020-07-21 22:22:18,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:18,570 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 30, 30, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:18,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:18,784 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:18,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1535607133, now seen corresponding path program 23 times [2020-07-21 22:22:18,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:18,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000342438] [2020-07-21 22:22:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:19,378 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:22:19,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:19,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:22:19,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8014 backedges. 664 proven. 858 refuted. 0 times theorem prover too weak. 6492 trivial. 0 not checked. [2020-07-21 22:22:19,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:23,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:23,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:24,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:24,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:25,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:25,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:25,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:26,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:26,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:26,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:26,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:26,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8014 backedges. 664 proven. 888 refuted. 0 times theorem prover too weak. 6462 trivial. 0 not checked. [2020-07-21 22:22:27,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000342438] [2020-07-21 22:22:27,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:27,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:22:27,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943852598] [2020-07-21 22:22:27,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:22:27,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:27,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:22:27,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:22:27,340 INFO L87 Difference]: Start difference. First operand 201 states and 451 transitions. Second operand 21 states. [2020-07-21 22:22:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:28,161 INFO L93 Difference]: Finished difference Result 271 states and 598 transitions. [2020-07-21 22:22:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:22:28,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 529 [2020-07-21 22:22:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:28,167 INFO L225 Difference]: With dead ends: 271 [2020-07-21 22:22:28,167 INFO L226 Difference]: Without dead ends: 253 [2020-07-21 22:22:28,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 1021 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:22:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-07-21 22:22:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 179. [2020-07-21 22:22:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-07-21 22:22:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 374 transitions. [2020-07-21 22:22:28,192 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 374 transitions. Word has length 529 [2020-07-21 22:22:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:28,193 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 374 transitions. [2020-07-21 22:22:28,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:22:28,193 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 374 transitions. [2020-07-21 22:22:28,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-21 22:22:28,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:28,199 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] [2020-07-21 22:22:28,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:28,414 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:28,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:28,415 INFO L82 PathProgramCache]: Analyzing trace with hash -389931600, now seen corresponding path program 24 times [2020-07-21 22:22:28,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:28,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243464035] [2020-07-21 22:22:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:22:28,995 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:22:28,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:28,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:22:29,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 619 proven. 465 refuted. 0 times theorem prover too weak. 4293 trivial. 0 not checked. [2020-07-21 22:22:29,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:32,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:32,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:32,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:34,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 621 proven. 484 refuted. 0 times theorem prover too weak. 4272 trivial. 0 not checked. [2020-07-21 22:22:34,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243464035] [2020-07-21 22:22:34,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:34,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:22:34,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667671567] [2020-07-21 22:22:34,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:22:34,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:34,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:22:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:22:34,737 INFO L87 Difference]: Start difference. First operand 179 states and 374 transitions. Second operand 19 states. [2020-07-21 22:22:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:35,358 INFO L93 Difference]: Finished difference Result 216 states and 458 transitions. [2020-07-21 22:22:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:22:35,360 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 436 [2020-07-21 22:22:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:35,363 INFO L225 Difference]: With dead ends: 216 [2020-07-21 22:22:35,364 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 22:22:35,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 839 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:22:35,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 22:22:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2020-07-21 22:22:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-21 22:22:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 409 transitions. [2020-07-21 22:22:35,386 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 409 transitions. Word has length 436 [2020-07-21 22:22:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:35,387 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 409 transitions. [2020-07-21 22:22:35,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:22:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 409 transitions. [2020-07-21 22:22:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2020-07-21 22:22:35,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:35,395 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 42, 42, 36, 35, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 14, 14, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:35,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:35,609 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:35,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash 391964030, now seen corresponding path program 25 times [2020-07-21 22:22:35,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:35,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89397128] [2020-07-21 22:22:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:22:36,175 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:22:36,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:36,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:22:36,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10393 backedges. 317 proven. 1230 refuted. 0 times theorem prover too weak. 8846 trivial. 0 not checked. [2020-07-21 22:22:36,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:40,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:41,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:41,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:42,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:42,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:42,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:42,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:42,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:42,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:42,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:42,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10393 backedges. 321 proven. 1249 refuted. 0 times theorem prover too weak. 8823 trivial. 0 not checked. [2020-07-21 22:22:43,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89397128] [2020-07-21 22:22:43,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:43,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:22:43,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121781767] [2020-07-21 22:22:43,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:22:43,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:43,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:22:43,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:22:43,075 INFO L87 Difference]: Start difference. First operand 189 states and 409 transitions. Second operand 19 states. [2020-07-21 22:22:43,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:43,705 INFO L93 Difference]: Finished difference Result 297 states and 695 transitions. [2020-07-21 22:22:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:22:43,707 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 600 [2020-07-21 22:22:43,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:43,712 INFO L225 Difference]: With dead ends: 297 [2020-07-21 22:22:43,713 INFO L226 Difference]: Without dead ends: 223 [2020-07-21 22:22:43,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1206 GetRequests, 1167 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:22:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-21 22:22:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 189. [2020-07-21 22:22:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-21 22:22:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 390 transitions. [2020-07-21 22:22:43,741 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 390 transitions. Word has length 600 [2020-07-21 22:22:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:43,741 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 390 transitions. [2020-07-21 22:22:43,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:22:43,742 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 390 transitions. [2020-07-21 22:22:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 22:22:43,748 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:43,749 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 29, 26, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:43,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:43,964 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash 650077727, now seen corresponding path program 26 times [2020-07-21 22:22:43,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:43,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939535746] [2020-07-21 22:22:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:22:44,585 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:22:44,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:44,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:22:44,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6443 backedges. 518 proven. 564 refuted. 0 times theorem prover too weak. 5361 trivial. 0 not checked. [2020-07-21 22:22:44,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:47,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:47,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:48,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:48,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:48,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:48,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:48,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:48,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:48,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:48,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:49,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6443 backedges. 522 proven. 576 refuted. 0 times theorem prover too weak. 5345 trivial. 0 not checked. [2020-07-21 22:22:49,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939535746] [2020-07-21 22:22:49,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:49,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:22:49,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247999007] [2020-07-21 22:22:49,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:22:49,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:22:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:22:49,799 INFO L87 Difference]: Start difference. First operand 189 states and 390 transitions. Second operand 17 states. [2020-07-21 22:22:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:50,380 INFO L93 Difference]: Finished difference Result 292 states and 691 transitions. [2020-07-21 22:22:50,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:22:50,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-21 22:22:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:50,387 INFO L225 Difference]: With dead ends: 292 [2020-07-21 22:22:50,388 INFO L226 Difference]: Without dead ends: 274 [2020-07-21 22:22:50,391 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 [2020-07-21 22:22:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-21 22:22:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 204. [2020-07-21 22:22:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 22:22:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 437 transitions. [2020-07-21 22:22:50,414 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 437 transitions. Word has length 476 [2020-07-21 22:22:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:50,415 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 437 transitions. [2020-07-21 22:22:50,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:22:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 437 transitions. [2020-07-21 22:22:50,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-07-21 22:22:50,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:50,421 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 29, 26, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 12, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:50,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:50,622 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:50,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:50,623 INFO L82 PathProgramCache]: Analyzing trace with hash 229459137, now seen corresponding path program 27 times [2020-07-21 22:22:50,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:50,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864868495] [2020-07-21 22:22:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:22:51,220 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:22:51,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:51,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:22:51,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5008 backedges. 331 proven. 566 refuted. 0 times theorem prover too weak. 4111 trivial. 0 not checked. [2020-07-21 22:22:51,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:53,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:54,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:55,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:55,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:55,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:55,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:55,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:55,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:55,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5008 backedges. 337 proven. 576 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2020-07-21 22:22:55,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864868495] [2020-07-21 22:22:55,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:55,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:22:55,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222030349] [2020-07-21 22:22:55,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:22:55,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:55,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:22:55,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:22:55,844 INFO L87 Difference]: Start difference. First operand 204 states and 437 transitions. Second operand 17 states. [2020-07-21 22:22:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:56,307 INFO L93 Difference]: Finished difference Result 245 states and 515 transitions. [2020-07-21 22:22:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:22:56,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 421 [2020-07-21 22:22:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:56,313 INFO L225 Difference]: With dead ends: 245 [2020-07-21 22:22:56,313 INFO L226 Difference]: Without dead ends: 220 [2020-07-21 22:22:56,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 813 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:22:56,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-07-21 22:22:56,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 195. [2020-07-21 22:22:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-07-21 22:22:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 416 transitions. [2020-07-21 22:22:56,334 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 416 transitions. Word has length 421 [2020-07-21 22:22:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:56,334 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 416 transitions. [2020-07-21 22:22:56,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:22:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 416 transitions. [2020-07-21 22:22:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-07-21 22:22:56,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:56,341 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 25, 23, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 9, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:56,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:56,547 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:56,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:56,548 INFO L82 PathProgramCache]: Analyzing trace with hash 477893042, now seen corresponding path program 28 times [2020-07-21 22:22:56,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:56,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945261520] [2020-07-21 22:22:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:22:57,185 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:22:57,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:57,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:22:57,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5297 backedges. 569 proven. 497 refuted. 0 times theorem prover too weak. 4231 trivial. 0 not checked. [2020-07-21 22:22:57,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:00,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:01,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:01,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:01,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:02,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:02,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:02,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:02,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:02,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:02,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5297 backedges. 569 proven. 520 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2020-07-21 22:23:03,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945261520] [2020-07-21 22:23:03,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:03,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:23:03,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265027753] [2020-07-21 22:23:03,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:23:03,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:03,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:23:03,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:23:03,207 INFO L87 Difference]: Start difference. First operand 195 states and 416 transitions. Second operand 19 states. [2020-07-21 22:23:04,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:04,044 INFO L93 Difference]: Finished difference Result 256 states and 593 transitions. [2020-07-21 22:23:04,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:23:04,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 433 [2020-07-21 22:23:04,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:04,050 INFO L225 Difference]: With dead ends: 256 [2020-07-21 22:23:04,051 INFO L226 Difference]: Without dead ends: 238 [2020-07-21 22:23:04,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 833 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:23:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-21 22:23:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 183. [2020-07-21 22:23:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-21 22:23:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 394 transitions. [2020-07-21 22:23:04,069 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 394 transitions. Word has length 433 [2020-07-21 22:23:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:04,069 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 394 transitions. [2020-07-21 22:23:04,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:23:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 394 transitions. [2020-07-21 22:23:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-07-21 22:23:04,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:04,073 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 24, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:04,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:04,274 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:04,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:04,275 INFO L82 PathProgramCache]: Analyzing trace with hash -461639084, now seen corresponding path program 29 times [2020-07-21 22:23:04,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:04,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476101773] [2020-07-21 22:23:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:23:04,924 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:23:04,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:04,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:23:04,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4677 backedges. 471 proven. 374 refuted. 0 times theorem prover too weak. 3832 trivial. 0 not checked. [2020-07-21 22:23:05,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:07,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:08,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:08,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:08,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:08,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:08,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:08,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:09,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4677 backedges. 475 proven. 384 refuted. 0 times theorem prover too weak. 3818 trivial. 0 not checked. [2020-07-21 22:23:09,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476101773] [2020-07-21 22:23:09,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:09,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:23:09,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577662066] [2020-07-21 22:23:09,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:23:09,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:09,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:23:09,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:23:09,895 INFO L87 Difference]: Start difference. First operand 183 states and 394 transitions. Second operand 17 states. [2020-07-21 22:23:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:10,442 INFO L93 Difference]: Finished difference Result 225 states and 485 transitions. [2020-07-21 22:23:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:23:10,444 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 408 [2020-07-21 22:23:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:10,448 INFO L225 Difference]: With dead ends: 225 [2020-07-21 22:23:10,448 INFO L226 Difference]: Without dead ends: 216 [2020-07-21 22:23:10,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 787 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:23:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-21 22:23:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 180. [2020-07-21 22:23:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-21 22:23:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 384 transitions. [2020-07-21 22:23:10,466 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 384 transitions. Word has length 408 [2020-07-21 22:23:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:10,466 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 384 transitions. [2020-07-21 22:23:10,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:23:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 384 transitions. [2020-07-21 22:23:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 22:23:10,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:10,473 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:10,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:10,686 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:10,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:10,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1440506223, now seen corresponding path program 30 times [2020-07-21 22:23:10,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:10,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102230221] [2020-07-21 22:23:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:23:11,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:23:11,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:11,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:23:11,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 385 proven. 291 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 22:23:11,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:13,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:13,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:13,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:14,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:14,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:14,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:14,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:14,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 385 proven. 301 refuted. 0 times theorem prover too weak. 3662 trivial. 0 not checked. [2020-07-21 22:23:15,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102230221] [2020-07-21 22:23:15,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:15,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:23:15,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771281323] [2020-07-21 22:23:15,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:23:15,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:15,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:23:15,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:23:15,450 INFO L87 Difference]: Start difference. First operand 180 states and 384 transitions. Second operand 15 states. [2020-07-21 22:23:15,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:15,908 INFO L93 Difference]: Finished difference Result 222 states and 474 transitions. [2020-07-21 22:23:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:23:15,910 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 394 [2020-07-21 22:23:15,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:15,914 INFO L225 Difference]: With dead ends: 222 [2020-07-21 22:23:15,914 INFO L226 Difference]: Without dead ends: 213 [2020-07-21 22:23:15,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 763 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:23:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-07-21 22:23:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 177. [2020-07-21 22:23:15,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-21 22:23:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 374 transitions. [2020-07-21 22:23:15,931 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 374 transitions. Word has length 394 [2020-07-21 22:23:15,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:15,932 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 374 transitions. [2020-07-21 22:23:15,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:23:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 374 transitions. [2020-07-21 22:23:15,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-07-21 22:23:15,936 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:15,936 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 24, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:16,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:16,137 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:16,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1485432085, now seen corresponding path program 31 times [2020-07-21 22:23:16,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:16,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306612236] [2020-07-21 22:23:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:23:16,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:23:16,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:16,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:23:16,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4992 backedges. 665 proven. 228 refuted. 0 times theorem prover too weak. 4099 trivial. 0 not checked. [2020-07-21 22:23:17,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:18,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:18,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:19,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:19,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:19,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:19,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:19,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:19,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:19,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:20,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4992 backedges. 669 proven. 240 refuted. 0 times theorem prover too weak. 4083 trivial. 0 not checked. [2020-07-21 22:23:21,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306612236] [2020-07-21 22:23:21,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:21,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:23:21,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047701111] [2020-07-21 22:23:21,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:23:21,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:21,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:23:21,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:23:21,616 INFO L87 Difference]: Start difference. First operand 177 states and 374 transitions. Second operand 17 states. [2020-07-21 22:23:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:22,050 INFO L93 Difference]: Finished difference Result 267 states and 689 transitions. [2020-07-21 22:23:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:23:22,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 421 [2020-07-21 22:23:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:22,058 INFO L225 Difference]: With dead ends: 267 [2020-07-21 22:23:22,058 INFO L226 Difference]: Without dead ends: 252 [2020-07-21 22:23:22,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 813 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:23:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-21 22:23:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 218. [2020-07-21 22:23:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-21 22:23:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 525 transitions. [2020-07-21 22:23:22,089 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 525 transitions. Word has length 421 [2020-07-21 22:23:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:22,089 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 525 transitions. [2020-07-21 22:23:22,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:23:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 525 transitions. [2020-07-21 22:23:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-07-21 22:23:22,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:22,098 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 30, 30, 25, 24, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:22,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:22,311 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:22,312 INFO L82 PathProgramCache]: Analyzing trace with hash -201155461, now seen corresponding path program 32 times [2020-07-21 22:23:22,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:22,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130180484] [2020-07-21 22:23:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:23,015 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:23:23,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:23,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:23:23,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5660 backedges. 776 proven. 316 refuted. 0 times theorem prover too weak. 4568 trivial. 0 not checked. [2020-07-21 22:23:23,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:26,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:26,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:27,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:27,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:27,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:27,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:27,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:28,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:28,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5660 backedges. 780 proven. 333 refuted. 0 times theorem prover too weak. 4547 trivial. 0 not checked. [2020-07-21 22:23:29,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130180484] [2020-07-21 22:23:29,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:29,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:23:29,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736166573] [2020-07-21 22:23:29,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:23:29,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:29,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:23:29,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:23:29,703 INFO L87 Difference]: Start difference. First operand 218 states and 525 transitions. Second operand 19 states. [2020-07-21 22:23:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:30,338 INFO L93 Difference]: Finished difference Result 282 states and 732 transitions. [2020-07-21 22:23:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:23:30,340 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 446 [2020-07-21 22:23:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:30,345 INFO L225 Difference]: With dead ends: 282 [2020-07-21 22:23:30,345 INFO L226 Difference]: Without dead ends: 267 [2020-07-21 22:23:30,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 859 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:23:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-07-21 22:23:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 216. [2020-07-21 22:23:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 22:23:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 475 transitions. [2020-07-21 22:23:30,375 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 475 transitions. Word has length 446 [2020-07-21 22:23:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:30,376 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 475 transitions. [2020-07-21 22:23:30,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:23:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 475 transitions. [2020-07-21 22:23:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-07-21 22:23:30,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:30,385 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] [2020-07-21 22:23:30,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:30,599 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1637358092, now seen corresponding path program 33 times [2020-07-21 22:23:30,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:30,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424624512] [2020-07-21 22:23:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:23:31,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:23:31,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:31,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:23:31,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 659 proven. 181 refuted. 0 times theorem prover too weak. 3845 trivial. 0 not checked. [2020-07-21 22:23:31,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:33,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:33,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:34,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:34,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:34,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:34,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:34,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:34,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:34,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:35,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4685 backedges. 661 proven. 195 refuted. 0 times theorem prover too weak. 3829 trivial. 0 not checked. [2020-07-21 22:23:36,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424624512] [2020-07-21 22:23:36,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:36,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:23:36,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371281543] [2020-07-21 22:23:36,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:23:36,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:36,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:23:36,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:23:36,456 INFO L87 Difference]: Start difference. First operand 216 states and 475 transitions. Second operand 17 states. [2020-07-21 22:23:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:37,017 INFO L93 Difference]: Finished difference Result 327 states and 817 transitions. [2020-07-21 22:23:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:23:37,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 408 [2020-07-21 22:23:37,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:37,025 INFO L225 Difference]: With dead ends: 327 [2020-07-21 22:23:37,025 INFO L226 Difference]: Without dead ends: 312 [2020-07-21 22:23:37,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 787 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:23:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-07-21 22:23:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 208. [2020-07-21 22:23:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-21 22:23:37,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 445 transitions. [2020-07-21 22:23:37,049 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 445 transitions. Word has length 408 [2020-07-21 22:23:37,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:37,049 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 445 transitions. [2020-07-21 22:23:37,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:23:37,050 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 445 transitions. [2020-07-21 22:23:37,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-21 22:23:37,056 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:37,056 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:37,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:37,257 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:37,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:37,258 INFO L82 PathProgramCache]: Analyzing trace with hash -964302113, now seen corresponding path program 34 times [2020-07-21 22:23:37,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:37,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937095876] [2020-07-21 22:23:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:23:37,994 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:23:37,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:37,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:23:38,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 573 proven. 178 refuted. 0 times theorem prover too weak. 4265 trivial. 0 not checked. [2020-07-21 22:23:38,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:39,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 575 proven. 186 refuted. 0 times theorem prover too weak. 4255 trivial. 0 not checked. [2020-07-21 22:23:42,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937095876] [2020-07-21 22:23:42,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:42,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:23:42,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391806464] [2020-07-21 22:23:42,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:23:42,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:42,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:23:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:23:42,095 INFO L87 Difference]: Start difference. First operand 208 states and 445 transitions. Second operand 15 states. [2020-07-21 22:23:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:42,586 INFO L93 Difference]: Finished difference Result 348 states and 914 transitions. [2020-07-21 22:23:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:23:42,588 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 422 [2020-07-21 22:23:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:42,595 INFO L225 Difference]: With dead ends: 348 [2020-07-21 22:23:42,596 INFO L226 Difference]: Without dead ends: 333 [2020-07-21 22:23:42,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 819 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:23:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-07-21 22:23:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 208. [2020-07-21 22:23:42,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-21 22:23:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 445 transitions. [2020-07-21 22:23:42,620 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 445 transitions. Word has length 422 [2020-07-21 22:23:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:42,621 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 445 transitions. [2020-07-21 22:23:42,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:23:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 445 transitions. [2020-07-21 22:23:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-21 22:23:42,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:42,626 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:42,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:42,827 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:42,828 INFO L82 PathProgramCache]: Analyzing trace with hash 998129903, now seen corresponding path program 35 times [2020-07-21 22:23:42,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:42,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117184656] [2020-07-21 22:23:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:23:43,642 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:23:43,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:43,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:23:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 685 proven. 191 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-07-21 22:23:43,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:45,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:46,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:46,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:46,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:46,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:46,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:47,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:47,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 689 proven. 201 refuted. 0 times theorem prover too weak. 4126 trivial. 0 not checked. [2020-07-21 22:23:48,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117184656] [2020-07-21 22:23:48,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:48,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:23:48,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102924333] [2020-07-21 22:23:48,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:23:48,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:48,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:23:48,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:23:48,708 INFO L87 Difference]: Start difference. First operand 208 states and 445 transitions. Second operand 17 states. [2020-07-21 22:23:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:49,250 INFO L93 Difference]: Finished difference Result 284 states and 651 transitions. [2020-07-21 22:23:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:23:49,252 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 422 [2020-07-21 22:23:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:49,256 INFO L225 Difference]: With dead ends: 284 [2020-07-21 22:23:49,257 INFO L226 Difference]: Without dead ends: 269 [2020-07-21 22:23:49,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 815 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:23:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-21 22:23:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 203. [2020-07-21 22:23:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-07-21 22:23:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 424 transitions. [2020-07-21 22:23:49,285 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 424 transitions. Word has length 422 [2020-07-21 22:23:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:49,286 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 424 transitions. [2020-07-21 22:23:49,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:23:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 424 transitions. [2020-07-21 22:23:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-21 22:23:49,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:49,292 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, 10, 10, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:49,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:49,506 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:49,507 INFO L82 PathProgramCache]: Analyzing trace with hash -969075608, now seen corresponding path program 36 times [2020-07-21 22:23:49,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:49,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342693583] [2020-07-21 22:23:49,508 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:50,342 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:23:50,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:50,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:23:50,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 869 proven. 214 refuted. 0 times theorem prover too weak. 4294 trivial. 0 not checked. [2020-07-21 22:23:50,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:52,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:52,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:52,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:53,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:53,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:53,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:53,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:53,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:53,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:53,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:54,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 871 proven. 233 refuted. 0 times theorem prover too weak. 4273 trivial. 0 not checked. [2020-07-21 22:23:55,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342693583] [2020-07-21 22:23:55,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:55,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:23:55,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36222268] [2020-07-21 22:23:55,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:23:55,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:55,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:23:55,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:23:55,006 INFO L87 Difference]: Start difference. First operand 203 states and 424 transitions. Second operand 19 states. [2020-07-21 22:23:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:55,503 INFO L93 Difference]: Finished difference Result 273 states and 564 transitions. [2020-07-21 22:23:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:23:55,504 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 436 [2020-07-21 22:23:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:55,509 INFO L225 Difference]: With dead ends: 273 [2020-07-21 22:23:55,509 INFO L226 Difference]: Without dead ends: 258 [2020-07-21 22:23:55,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 839 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:23:55,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-21 22:23:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 223. [2020-07-21 22:23:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-21 22:23:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 454 transitions. [2020-07-21 22:23:55,539 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 454 transitions. Word has length 436 [2020-07-21 22:23:55,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:55,540 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 454 transitions. [2020-07-21 22:23:55,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:23:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 454 transitions. [2020-07-21 22:23:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 22:23:55,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:55,548 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 31, 28, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 14, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:55,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:55,763 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:55,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1839081181, now seen corresponding path program 37 times [2020-07-21 22:23:55,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:55,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041619839] [2020-07-21 22:23:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:23:56,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:23:56,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:56,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:23:56,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7263 backedges. 762 proven. 336 refuted. 0 times theorem prover too weak. 6165 trivial. 0 not checked. [2020-07-21 22:23:56,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:58,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:58,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:59,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:59,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7263 backedges. 766 proven. 348 refuted. 0 times theorem prover too weak. 6149 trivial. 0 not checked. [2020-07-21 22:24:01,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041619839] [2020-07-21 22:24:01,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:01,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:24:01,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954132421] [2020-07-21 22:24:01,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:24:01,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:01,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:24:01,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:24:01,321 INFO L87 Difference]: Start difference. First operand 223 states and 454 transitions. Second operand 17 states. [2020-07-21 22:24:01,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:01,673 INFO L93 Difference]: Finished difference Result 328 states and 673 transitions. [2020-07-21 22:24:01,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:24:01,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 504 [2020-07-21 22:24:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:01,679 INFO L225 Difference]: With dead ends: 328 [2020-07-21 22:24:01,680 INFO L226 Difference]: Without dead ends: 313 [2020-07-21 22:24:01,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 979 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:24:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-07-21 22:24:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 220. [2020-07-21 22:24:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-21 22:24:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 451 transitions. [2020-07-21 22:24:01,703 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 451 transitions. Word has length 504 [2020-07-21 22:24:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:01,704 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 451 transitions. [2020-07-21 22:24:01,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:24:01,704 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 451 transitions. [2020-07-21 22:24:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-21 22:24:01,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:01,709 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] [2020-07-21 22:24:01,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:01,918 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:01,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:01,919 INFO L82 PathProgramCache]: Analyzing trace with hash -584294038, now seen corresponding path program 38 times [2020-07-21 22:24:01,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:01,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978246470] [2020-07-21 22:24:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:24:02,766 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:24:02,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:24:02,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 615 proven. 210 refuted. 0 times theorem prover too weak. 5231 trivial. 0 not checked. [2020-07-21 22:24:02,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:04,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:04,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:04,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:04,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:04,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:04,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:05,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 615 proven. 222 refuted. 0 times theorem prover too weak. 5219 trivial. 0 not checked. [2020-07-21 22:24:06,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978246470] [2020-07-21 22:24:06,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:06,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:24:06,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681234112] [2020-07-21 22:24:06,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:24:06,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:06,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:24:06,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:24:06,036 INFO L87 Difference]: Start difference. First operand 220 states and 451 transitions. Second operand 15 states. [2020-07-21 22:24:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:06,323 INFO L93 Difference]: Finished difference Result 258 states and 549 transitions. [2020-07-21 22:24:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:24:06,324 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 462 [2020-07-21 22:24:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:06,328 INFO L225 Difference]: With dead ends: 258 [2020-07-21 22:24:06,328 INFO L226 Difference]: Without dead ends: 243 [2020-07-21 22:24:06,329 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 [2020-07-21 22:24:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-21 22:24:06,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2020-07-21 22:24:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 22:24:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 438 transitions. [2020-07-21 22:24:06,347 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 438 transitions. Word has length 462 [2020-07-21 22:24:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:06,348 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 438 transitions. [2020-07-21 22:24:06,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:24:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 438 transitions. [2020-07-21 22:24:06,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 22:24:06,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:06,351 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 27, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:06,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:06,552 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:06,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1958265817, now seen corresponding path program 39 times [2020-07-21 22:24:06,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:06,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18631863] [2020-07-21 22:24:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:24:07,373 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:24:07,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:07,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:24:07,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5707 backedges. 839 proven. 170 refuted. 0 times theorem prover too weak. 4698 trivial. 0 not checked. [2020-07-21 22:24:07,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:09,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:09,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:09,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:09,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:09,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:09,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:09,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:09,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:10,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:10,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:10,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5707 backedges. 839 proven. 190 refuted. 0 times theorem prover too weak. 4678 trivial. 0 not checked. [2020-07-21 22:24:11,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18631863] [2020-07-21 22:24:11,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:11,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:24:11,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700438766] [2020-07-21 22:24:11,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:24:11,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:11,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:24:11,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:24:11,319 INFO L87 Difference]: Start difference. First operand 215 states and 438 transitions. Second operand 17 states. [2020-07-21 22:24:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:11,691 INFO L93 Difference]: Finished difference Result 295 states and 637 transitions. [2020-07-21 22:24:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:24:11,692 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 449 [2020-07-21 22:24:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:11,697 INFO L225 Difference]: With dead ends: 295 [2020-07-21 22:24:11,697 INFO L226 Difference]: Without dead ends: 274 [2020-07-21 22:24:11,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 869 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:24:11,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-21 22:24:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 232. [2020-07-21 22:24:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-21 22:24:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 463 transitions. [2020-07-21 22:24:11,716 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 463 transitions. Word has length 449 [2020-07-21 22:24:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:11,716 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 463 transitions. [2020-07-21 22:24:11,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:24:11,717 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 463 transitions. [2020-07-21 22:24:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 22:24:11,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:11,720 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] [2020-07-21 22:24:11,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:11,922 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:11,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:11,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1504540284, now seen corresponding path program 40 times [2020-07-21 22:24:11,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:11,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997794863] [2020-07-21 22:24:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:24:12,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:24:12,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:24:12,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 730 proven. 177 refuted. 0 times theorem prover too weak. 4437 trivial. 0 not checked. [2020-07-21 22:24:12,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:14,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:14,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:14,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:15,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:15,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:15,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:15,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:15,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:15,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 734 proven. 189 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2020-07-21 22:24:16,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997794863] [2020-07-21 22:24:16,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:16,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:24:16,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986010717] [2020-07-21 22:24:16,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:24:16,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:16,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:24:16,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:24:16,619 INFO L87 Difference]: Start difference. First operand 232 states and 463 transitions. Second operand 17 states. [2020-07-21 22:24:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:16,979 INFO L93 Difference]: Finished difference Result 266 states and 527 transitions. [2020-07-21 22:24:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:24:16,981 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 435 [2020-07-21 22:24:16,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:16,985 INFO L225 Difference]: With dead ends: 266 [2020-07-21 22:24:16,985 INFO L226 Difference]: Without dead ends: 251 [2020-07-21 22:24:16,986 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 [2020-07-21 22:24:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-21 22:24:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 229. [2020-07-21 22:24:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-07-21 22:24:17,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 453 transitions. [2020-07-21 22:24:17,009 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 453 transitions. Word has length 435 [2020-07-21 22:24:17,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:17,009 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 453 transitions. [2020-07-21 22:24:17,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:24:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 453 transitions. [2020-07-21 22:24:17,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 22:24:17,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:17,015 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 27, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:17,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:17,224 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:17,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1565605607, now seen corresponding path program 41 times [2020-07-21 22:24:17,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:17,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178336057] [2020-07-21 22:24:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:24:18,043 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:24:18,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:18,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:24:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5732 backedges. 514 proven. 450 refuted. 0 times theorem prover too weak. 4768 trivial. 0 not checked. [2020-07-21 22:24:18,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:20,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:20,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:20,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:21,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:21,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:21,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:21,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:21,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:21,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:21,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5732 backedges. 518 proven. 462 refuted. 0 times theorem prover too weak. 4752 trivial. 0 not checked. [2020-07-21 22:24:22,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178336057] [2020-07-21 22:24:22,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:22,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:24:22,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430054027] [2020-07-21 22:24:22,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:24:22,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:22,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:24:22,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:24:22,071 INFO L87 Difference]: Start difference. First operand 229 states and 453 transitions. Second operand 17 states. [2020-07-21 22:24:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:22,431 INFO L93 Difference]: Finished difference Result 275 states and 549 transitions. [2020-07-21 22:24:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:24:22,433 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 450 [2020-07-21 22:24:22,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:22,437 INFO L225 Difference]: With dead ends: 275 [2020-07-21 22:24:22,438 INFO L226 Difference]: Without dead ends: 260 [2020-07-21 22:24:22,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 871 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:24:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-21 22:24:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 218. [2020-07-21 22:24:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-21 22:24:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 419 transitions. [2020-07-21 22:24:22,457 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 419 transitions. Word has length 450 [2020-07-21 22:24:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:22,457 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 419 transitions. [2020-07-21 22:24:22,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:24:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 419 transitions. [2020-07-21 22:24:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 22:24:22,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:22,463 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] [2020-07-21 22:24:22,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:22,664 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash -874765331, now seen corresponding path program 42 times [2020-07-21 22:24:22,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:22,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083911744] [2020-07-21 22:24:22,666 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 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:23,527 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:24:23,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:23,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:24:23,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 935 proven. 253 refuted. 0 times theorem prover too weak. 5226 trivial. 0 not checked. [2020-07-21 22:24:23,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:25,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:26,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:26,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:27,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:27,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:27,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:27,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:27,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:27,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:27,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 939 proven. 272 refuted. 0 times theorem prover too weak. 5203 trivial. 0 not checked. [2020-07-21 22:24:28,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083911744] [2020-07-21 22:24:28,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:28,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:24:28,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800856693] [2020-07-21 22:24:28,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:24:28,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:28,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:24:28,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:24:28,714 INFO L87 Difference]: Start difference. First operand 218 states and 419 transitions. Second operand 20 states. [2020-07-21 22:24:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:29,162 INFO L93 Difference]: Finished difference Result 302 states and 573 transitions. [2020-07-21 22:24:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:24:29,163 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 475 [2020-07-21 22:24:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:29,169 INFO L225 Difference]: With dead ends: 302 [2020-07-21 22:24:29,169 INFO L226 Difference]: Without dead ends: 287 [2020-07-21 22:24:29,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 917 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:24:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-07-21 22:24:29,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 215. [2020-07-21 22:24:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 22:24:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 416 transitions. [2020-07-21 22:24:29,196 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 416 transitions. Word has length 475 [2020-07-21 22:24:29,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:29,197 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 416 transitions. [2020-07-21 22:24:29,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:24:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 416 transitions. [2020-07-21 22:24:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2020-07-21 22:24:29,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:29,204 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 35, 35, 30, 28, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:29,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:29,405 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1514717428, now seen corresponding path program 43 times [2020-07-21 22:24:29,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:29,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616106422] [2020-07-21 22:24:29,406 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 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:30,252 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:24:30,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:30,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:24:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7617 backedges. 624 proven. 276 refuted. 0 times theorem prover too weak. 6717 trivial. 0 not checked. [2020-07-21 22:24:30,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:32,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:33,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:33,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:33,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:33,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:33,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:33,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:33,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:34,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7617 backedges. 624 proven. 286 refuted. 0 times theorem prover too weak. 6707 trivial. 0 not checked. [2020-07-21 22:24:35,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616106422] [2020-07-21 22:24:35,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:35,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:24:35,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277893553] [2020-07-21 22:24:35,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:24:35,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:35,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:24:35,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:24:35,915 INFO L87 Difference]: Start difference. First operand 215 states and 416 transitions. Second operand 15 states. [2020-07-21 22:24:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:36,432 INFO L93 Difference]: Finished difference Result 243 states and 464 transitions. [2020-07-21 22:24:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:24:36,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 515 [2020-07-21 22:24:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:36,440 INFO L225 Difference]: With dead ends: 243 [2020-07-21 22:24:36,440 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 22:24:36,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1005 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:24:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 22:24:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 206. [2020-07-21 22:24:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-21 22:24:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 398 transitions. [2020-07-21 22:24:36,459 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 398 transitions. Word has length 515 [2020-07-21 22:24:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:36,459 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 398 transitions. [2020-07-21 22:24:36,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:24:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 398 transitions. [2020-07-21 22:24:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 22:24:36,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:36,464 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] [2020-07-21 22:24:36,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:36,678 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:36,679 INFO L82 PathProgramCache]: Analyzing trace with hash -294042732, now seen corresponding path program 44 times [2020-07-21 22:24:36,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:36,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137334409] [2020-07-21 22:24:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:24:37,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:24:37,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:24:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 931 proven. 221 refuted. 0 times theorem prover too weak. 4930 trivial. 0 not checked. [2020-07-21 22:24:37,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:41,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:41,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:42,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:42,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:42,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:42,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:43,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:43,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:43,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:43,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:43,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:43,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:44,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 931 proven. 244 refuted. 0 times theorem prover too weak. 4907 trivial. 0 not checked. [2020-07-21 22:24:45,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137334409] [2020-07-21 22:24:45,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:45,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:24:45,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762135887] [2020-07-21 22:24:45,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:24:45,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:45,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:24:45,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:24:45,871 INFO L87 Difference]: Start difference. First operand 206 states and 398 transitions. Second operand 19 states. [2020-07-21 22:24:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:46,792 INFO L93 Difference]: Finished difference Result 243 states and 486 transitions. [2020-07-21 22:24:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:24:46,792 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 463 [2020-07-21 22:24:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:46,795 INFO L225 Difference]: With dead ends: 243 [2020-07-21 22:24:46,796 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 22:24:46,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 893 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:24:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 22:24:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 198. [2020-07-21 22:24:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 22:24:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 368 transitions. [2020-07-21 22:24:46,815 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 368 transitions. Word has length 463 [2020-07-21 22:24:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:46,815 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 368 transitions. [2020-07-21 22:24:46,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:24:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 368 transitions. [2020-07-21 22:24:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-07-21 22:24:46,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:46,821 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 28, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 12, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:47,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:47,032 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash 277654961, now seen corresponding path program 45 times [2020-07-21 22:24:47,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:47,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439080429] [2020-07-21 22:24:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:24:47,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:24:47,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:47,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:24:47,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5759 backedges. 672 proven. 139 refuted. 0 times theorem prover too weak. 4948 trivial. 0 not checked. [2020-07-21 22:24:48,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:50,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:50,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:50,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:50,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:50,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:50,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:50,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:51,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:51,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5759 backedges. 676 proven. 145 refuted. 0 times theorem prover too weak. 4938 trivial. 0 not checked. [2020-07-21 22:24:53,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439080429] [2020-07-21 22:24:53,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:53,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:24:53,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730697793] [2020-07-21 22:24:53,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:24:53,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:53,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:24:53,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:24:53,112 INFO L87 Difference]: Start difference. First operand 198 states and 368 transitions. Second operand 15 states. [2020-07-21 22:24:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:53,564 INFO L93 Difference]: Finished difference Result 269 states and 563 transitions. [2020-07-21 22:24:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:24:53,567 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 451 [2020-07-21 22:24:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:53,571 INFO L225 Difference]: With dead ends: 269 [2020-07-21 22:24:53,572 INFO L226 Difference]: Without dead ends: 256 [2020-07-21 22:24:53,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 877 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:24:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-07-21 22:24:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 214. [2020-07-21 22:24:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-21 22:24:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 412 transitions. [2020-07-21 22:24:53,597 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 412 transitions. Word has length 451 [2020-07-21 22:24:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:53,597 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 412 transitions. [2020-07-21 22:24:53,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:24:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 412 transitions. [2020-07-21 22:24:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 22:24:53,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:53,601 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 25, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:53,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:53,802 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:53,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:53,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1846663377, now seen corresponding path program 46 times [2020-07-21 22:24:53,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:53,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309422077] [2020-07-21 22:24:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:24:54,750 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:24:54,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:54,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:24:54,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5719 backedges. 810 proven. 133 refuted. 0 times theorem prover too weak. 4776 trivial. 0 not checked. [2020-07-21 22:24:54,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:57,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:58,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:58,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:58,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:58,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:58,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:59,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:59,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5719 backedges. 816 proven. 141 refuted. 0 times theorem prover too weak. 4762 trivial. 0 not checked. [2020-07-21 22:25:01,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309422077] [2020-07-21 22:25:01,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:01,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:25:01,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71040006] [2020-07-21 22:25:01,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:25:01,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:01,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:25:01,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:25:01,609 INFO L87 Difference]: Start difference. First operand 214 states and 412 transitions. Second operand 17 states. [2020-07-21 22:25:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:02,312 INFO L93 Difference]: Finished difference Result 255 states and 492 transitions. [2020-07-21 22:25:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:25:02,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 449 [2020-07-21 22:25:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:02,322 INFO L225 Difference]: With dead ends: 255 [2020-07-21 22:25:02,323 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 22:25:02,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 869 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:25:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 22:25:02,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 201. [2020-07-21 22:25:02,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 22:25:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 360 transitions. [2020-07-21 22:25:02,356 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 360 transitions. Word has length 449 [2020-07-21 22:25:02,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:02,357 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 360 transitions. [2020-07-21 22:25:02,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:25:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 360 transitions. [2020-07-21 22:25:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 22:25:02,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:02,364 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] [2020-07-21 22:25:02,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:02,581 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:02,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1210027796, now seen corresponding path program 47 times [2020-07-21 22:25:02,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:02,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830492511] [2020-07-21 22:25:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:25:03,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:25:03,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:03,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:25:03,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 1043 proven. 187 refuted. 0 times theorem prover too weak. 5610 trivial. 0 not checked. [2020-07-21 22:25:04,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:08,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:08,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:08,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:09,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:10,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:10,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:10,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:10,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:10,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:11,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 1043 proven. 208 refuted. 0 times theorem prover too weak. 5589 trivial. 0 not checked. [2020-07-21 22:25:13,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830492511] [2020-07-21 22:25:13,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:13,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:25:13,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968581096] [2020-07-21 22:25:13,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:25:13,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:13,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:25:13,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:25:13,265 INFO L87 Difference]: Start difference. First operand 201 states and 360 transitions. Second operand 19 states. [2020-07-21 22:25:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:14,237 INFO L93 Difference]: Finished difference Result 267 states and 498 transitions. [2020-07-21 22:25:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:25:14,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 490 [2020-07-21 22:25:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:14,247 INFO L225 Difference]: With dead ends: 267 [2020-07-21 22:25:14,247 INFO L226 Difference]: Without dead ends: 254 [2020-07-21 22:25:14,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 947 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:25:14,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-07-21 22:25:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 196. [2020-07-21 22:25:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-21 22:25:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 355 transitions. [2020-07-21 22:25:14,274 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 355 transitions. Word has length 490 [2020-07-21 22:25:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:14,275 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 355 transitions. [2020-07-21 22:25:14,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:25:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 355 transitions. [2020-07-21 22:25:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 22:25:14,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:14,282 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] [2020-07-21 22:25:14,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:14,497 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash -286256875, now seen corresponding path program 48 times [2020-07-21 22:25:14,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:14,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547035731] [2020-07-21 22:25:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:25:15,415 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:25:15,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:15,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:25:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 671 proven. 157 refuted. 0 times theorem prover too weak. 5625 trivial. 0 not checked. [2020-07-21 22:25:15,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:17,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:17,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:18,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:18,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:18,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:18,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:18,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:19,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:20,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 673 proven. 165 refuted. 0 times theorem prover too weak. 5615 trivial. 0 not checked. [2020-07-21 22:25:21,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547035731] [2020-07-21 22:25:21,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:21,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:25:21,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112848770] [2020-07-21 22:25:21,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:25:21,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:25:21,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:25:21,763 INFO L87 Difference]: Start difference. First operand 196 states and 355 transitions. Second operand 15 states. [2020-07-21 22:25:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:22,350 INFO L93 Difference]: Finished difference Result 239 states and 436 transitions. [2020-07-21 22:25:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:25:22,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 476 [2020-07-21 22:25:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:22,357 INFO L225 Difference]: With dead ends: 239 [2020-07-21 22:25:22,357 INFO L226 Difference]: Without dead ends: 226 [2020-07-21 22:25:22,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 927 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:25:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-21 22:25:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 188. [2020-07-21 22:25:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-21 22:25:22,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 337 transitions. [2020-07-21 22:25:22,374 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 337 transitions. Word has length 476 [2020-07-21 22:25:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:22,375 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 337 transitions. [2020-07-21 22:25:22,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:25:22,375 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 337 transitions. [2020-07-21 22:25:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 22:25:22,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:22,379 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] [2020-07-21 22:25:22,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:22,580 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 49 times [2020-07-21 22:25:22,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:22,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228775029] [2020-07-21 22:25:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:25:23,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:25:23,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:23,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 271 conjunts are in the unsatisfiable core [2020-07-21 22:25:23,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-21 22:25:26,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-21 22:25:44,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228775029] [2020-07-21 22:25:44,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:44,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 52 [2020-07-21 22:25:44,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116468722] [2020-07-21 22:25:44,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-21 22:25:44,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-21 22:25:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-07-21 22:25:44,155 INFO L87 Difference]: Start difference. First operand 188 states and 337 transitions. Second operand 52 states. [2020-07-21 22:25:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:48,909 INFO L93 Difference]: Finished difference Result 445 states and 969 transitions. [2020-07-21 22:25:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-21 22:25:48,913 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 463 [2020-07-21 22:25:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:48,928 INFO L225 Difference]: With dead ends: 445 [2020-07-21 22:25:48,929 INFO L226 Difference]: Without dead ends: 438 [2020-07-21 22:25:48,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=153, Invalid=3269, Unknown=0, NotChecked=0, Total=3422 [2020-07-21 22:25:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-07-21 22:25:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 295. [2020-07-21 22:25:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-07-21 22:25:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 625 transitions. [2020-07-21 22:25:48,991 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 625 transitions. Word has length 463 [2020-07-21 22:25:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:48,991 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 625 transitions. [2020-07-21 22:25:48,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-21 22:25:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 625 transitions. [2020-07-21 22:25:48,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 22:25:48,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:48,998 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 28, 27, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:25:49,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:49,199 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:49,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:49,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1816326007, now seen corresponding path program 50 times [2020-07-21 22:25:49,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:49,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325156383] [2020-07-21 22:25:49,201 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 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:50,141 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:25:50,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:50,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:25:50,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 295 proven. 849 refuted. 0 times theorem prover too weak. 5993 trivial. 0 not checked. [2020-07-21 22:25:50,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:52,769 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-21 22:25:55,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:55,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:57,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:57,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:58,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:58,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:58,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:58,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:58,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:59,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:59,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 299 proven. 859 refuted. 0 times theorem prover too weak. 5979 trivial. 0 not checked. [2020-07-21 22:25:59,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325156383] [2020-07-21 22:25:59,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:59,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:25:59,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102002319] [2020-07-21 22:25:59,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:25:59,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:59,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:25:59,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:25:59,593 INFO L87 Difference]: Start difference. First operand 295 states and 625 transitions. Second operand 19 states. [2020-07-21 22:26:00,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:26:00,567 INFO L93 Difference]: Finished difference Result 415 states and 913 transitions. [2020-07-21 22:26:00,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:26:00,572 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 500 [2020-07-21 22:26:00,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:26:00,579 INFO L225 Difference]: With dead ends: 415 [2020-07-21 22:26:00,579 INFO L226 Difference]: Without dead ends: 334 [2020-07-21 22:26:00,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 969 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:26:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-07-21 22:26:00,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 304. [2020-07-21 22:26:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-07-21 22:26:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 634 transitions. [2020-07-21 22:26:00,618 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 634 transitions. Word has length 500 [2020-07-21 22:26:00,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:26:00,618 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 634 transitions. [2020-07-21 22:26:00,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:26:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 634 transitions. [2020-07-21 22:26:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-07-21 22:26:00,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:26:00,625 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 28, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 10, 10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:26:00,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:00,826 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:26:00,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:26:00,827 INFO L82 PathProgramCache]: Analyzing trace with hash -666272308, now seen corresponding path program 51 times [2020-07-21 22:26:00,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:26:00,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094604503] [2020-07-21 22:26:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:26:02,444 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:26:02,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:26:02,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:26:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:26:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7501 backedges. 328 proven. 1021 refuted. 0 times theorem prover too weak. 6152 trivial. 0 not checked. [2020-07-21 22:26:02,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:26:05,488 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-07-21 22:26:09,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:09,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:11,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:12,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:13,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:13,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:13,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:13,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:14,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7501 backedges. 327 proven. 1043 refuted. 0 times theorem prover too weak. 6131 trivial. 0 not checked. [2020-07-21 22:26:14,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094604503] [2020-07-21 22:26:14,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:26:14,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 22:26:14,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192048733] [2020-07-21 22:26:14,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:26:14,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:26:14,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:26:14,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:26:14,521 INFO L87 Difference]: Start difference. First operand 304 states and 634 transitions. Second operand 21 states. [2020-07-21 22:26:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:26:15,882 INFO L93 Difference]: Finished difference Result 376 states and 759 transitions. [2020-07-21 22:26:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:26:15,887 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 512 [2020-07-21 22:26:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:26:15,896 INFO L225 Difference]: With dead ends: 376 [2020-07-21 22:26:15,896 INFO L226 Difference]: Without dead ends: 310 [2020-07-21 22:26:15,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 989 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:26:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-07-21 22:26:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 293. [2020-07-21 22:26:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-07-21 22:26:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 581 transitions. [2020-07-21 22:26:15,951 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 581 transitions. Word has length 512 [2020-07-21 22:26:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:26:15,951 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 581 transitions. [2020-07-21 22:26:15,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:26:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 581 transitions. [2020-07-21 22:26:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 22:26:15,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:26:15,962 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 28, 28, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 11, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:26:16,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:16,178 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:26:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:26:16,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1681290717, now seen corresponding path program 52 times [2020-07-21 22:26:16,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:26:16,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525407778] [2020-07-21 22:26:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:26:17,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:26:17,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:26:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:26:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:26:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 371 proven. 826 refuted. 0 times theorem prover too weak. 5271 trivial. 0 not checked. [2020-07-21 22:26:17,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:26:23,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:24,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:25,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:25,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:26,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:26,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:26,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:26,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:26,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:26,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:26,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 377 proven. 841 refuted. 0 times theorem prover too weak. 5250 trivial. 0 not checked. [2020-07-21 22:26:27,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525407778] [2020-07-21 22:26:27,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:26:27,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:26:27,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848305703] [2020-07-21 22:26:27,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:26:27,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:26:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:26:27,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:26:27,511 INFO L87 Difference]: Start difference. First operand 293 states and 581 transitions. Second operand 19 states. [2020-07-21 22:26:28,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:26:28,457 INFO L93 Difference]: Finished difference Result 356 states and 688 transitions. [2020-07-21 22:26:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:26:28,463 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 477 [2020-07-21 22:26:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:26:28,472 INFO L225 Difference]: With dead ends: 356 [2020-07-21 22:26:28,473 INFO L226 Difference]: Without dead ends: 339 [2020-07-21 22:26:28,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 921 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:26:28,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-07-21 22:26:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 306. [2020-07-21 22:26:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-07-21 22:26:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 609 transitions. [2020-07-21 22:26:28,519 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 609 transitions. Word has length 477 [2020-07-21 22:26:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:26:28,520 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 609 transitions. [2020-07-21 22:26:28,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:26:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 609 transitions. [2020-07-21 22:26:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 22:26:28,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:26:28,527 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 26, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:26:28,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:28,729 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:26:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:26:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash 148057102, now seen corresponding path program 53 times [2020-07-21 22:26:28,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:26:28,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712264809] [2020-07-21 22:26:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:26:29,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:26:29,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:26:29,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:26:29,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:26:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6732 backedges. 414 proven. 858 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2020-07-21 22:26:30,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:26:32,927 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-21 22:26:36,404 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 22:26:36,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:36,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:38,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:38,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:39,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:39,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:40,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:40,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:40,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:40,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:40,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:40,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:41,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6732 backedges. 413 proven. 880 refuted. 0 times theorem prover too weak. 5439 trivial. 0 not checked. [2020-07-21 22:26:41,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712264809] [2020-07-21 22:26:41,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:26:41,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 22:26:41,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122559111] [2020-07-21 22:26:41,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:26:41,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:26:41,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:26:41,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:26:41,872 INFO L87 Difference]: Start difference. First operand 306 states and 609 transitions. Second operand 21 states. [2020-07-21 22:26:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:26:43,105 INFO L93 Difference]: Finished difference Result 359 states and 694 transitions. [2020-07-21 22:26:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:26:43,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 486 [2020-07-21 22:26:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:26:43,120 INFO L225 Difference]: With dead ends: 359 [2020-07-21 22:26:43,121 INFO L226 Difference]: Without dead ends: 342 [2020-07-21 22:26:43,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 937 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:26:43,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-07-21 22:26:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 301. [2020-07-21 22:26:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-07-21 22:26:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 598 transitions. [2020-07-21 22:26:43,158 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 598 transitions. Word has length 486 [2020-07-21 22:26:43,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:26:43,158 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 598 transitions. [2020-07-21 22:26:43,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:26:43,158 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 598 transitions. [2020-07-21 22:26:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 22:26:43,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:26:43,165 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 26, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:26:43,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:43,366 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:26:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:26:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1852936030, now seen corresponding path program 54 times [2020-07-21 22:26:43,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:26:43,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018759002] [2020-07-21 22:26:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:26:44,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:26:44,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:26:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:26:44,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:26:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6740 backedges. 524 proven. 582 refuted. 0 times theorem prover too weak. 5634 trivial. 0 not checked. [2020-07-21 22:26:44,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:26:50,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:51,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:52,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:53,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:53,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:53,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:54,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6740 backedges. 522 proven. 600 refuted. 0 times theorem prover too weak. 5618 trivial. 0 not checked. [2020-07-21 22:26:55,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018759002] [2020-07-21 22:26:55,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:26:55,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:26:55,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792311925] [2020-07-21 22:26:55,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:26:55,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:26:55,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:26:55,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:26:55,673 INFO L87 Difference]: Start difference. First operand 301 states and 598 transitions. Second operand 19 states. [2020-07-21 22:26:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:26:56,758 INFO L93 Difference]: Finished difference Result 387 states and 781 transitions. [2020-07-21 22:26:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:26:56,764 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 486 [2020-07-21 22:26:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:26:56,772 INFO L225 Difference]: With dead ends: 387 [2020-07-21 22:26:56,772 INFO L226 Difference]: Without dead ends: 369 [2020-07-21 22:26:56,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 941 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:26:56,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-07-21 22:26:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 310. [2020-07-21 22:26:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-07-21 22:26:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 613 transitions. [2020-07-21 22:26:56,829 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 613 transitions. Word has length 486 [2020-07-21 22:26:56,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:26:56,830 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 613 transitions. [2020-07-21 22:26:56,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:26:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 613 transitions. [2020-07-21 22:26:56,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2020-07-21 22:26:56,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:26:56,844 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 30, 28, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 13, 10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:26:57,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:57,058 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:26:57,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:26:57,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1850068109, now seen corresponding path program 55 times [2020-07-21 22:26:57,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:26:57,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773262561] [2020-07-21 22:26:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:26:58,065 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:26:58,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:26:58,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:26:58,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:26:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8733 backedges. 392 proven. 879 refuted. 0 times theorem prover too weak. 7462 trivial. 0 not checked. [2020-07-21 22:26:58,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:27:01,387 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-07-21 22:27:05,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:07,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:07,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:08,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:08,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:09,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:09,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:09,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:09,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:10,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8733 backedges. 394 proven. 893 refuted. 0 times theorem prover too weak. 7446 trivial. 0 not checked. [2020-07-21 22:27:10,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773262561] [2020-07-21 22:27:10,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:27:10,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:27:10,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849589334] [2020-07-21 22:27:10,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:27:10,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:27:10,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:27:10,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:27:10,882 INFO L87 Difference]: Start difference. First operand 310 states and 613 transitions. Second operand 19 states. [2020-07-21 22:27:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:27:12,153 INFO L93 Difference]: Finished difference Result 419 states and 860 transitions. [2020-07-21 22:27:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:27:12,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 551 [2020-07-21 22:27:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:27:12,168 INFO L225 Difference]: With dead ends: 419 [2020-07-21 22:27:12,169 INFO L226 Difference]: Without dead ends: 392 [2020-07-21 22:27:12,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1107 GetRequests, 1071 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:27:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-07-21 22:27:12,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 307. [2020-07-21 22:27:12,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-07-21 22:27:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 608 transitions. [2020-07-21 22:27:12,212 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 608 transitions. Word has length 551 [2020-07-21 22:27:12,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:27:12,212 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 608 transitions. [2020-07-21 22:27:12,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:27:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 608 transitions. [2020-07-21 22:27:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 22:27:12,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:27:12,220 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 28, 27, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 12, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:27:12,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:27:12,421 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:27:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:27:12,422 INFO L82 PathProgramCache]: Analyzing trace with hash -521578358, now seen corresponding path program 56 times [2020-07-21 22:27:12,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:27:12,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856391090] [2020-07-21 22:27:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:27:13,516 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:27:13,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:27:13,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:27:13,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:27:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 541 proven. 674 refuted. 0 times theorem prover too weak. 5602 trivial. 0 not checked. [2020-07-21 22:27:13,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:27:21,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:22,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:22,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:23,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:24,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:24,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:24,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:24,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:24,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:24,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:24,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:25,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 543 proven. 695 refuted. 0 times theorem prover too weak. 5579 trivial. 0 not checked. [2020-07-21 22:27:26,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856391090] [2020-07-21 22:27:26,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:27:26,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:27:26,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451010979] [2020-07-21 22:27:26,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:27:26,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:27:26,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:27:26,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:27:26,765 INFO L87 Difference]: Start difference. First operand 307 states and 608 transitions. Second operand 19 states. [2020-07-21 22:27:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:27:27,933 INFO L93 Difference]: Finished difference Result 398 states and 771 transitions. [2020-07-21 22:27:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:27:27,939 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 488 [2020-07-21 22:27:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:27:27,950 INFO L225 Difference]: With dead ends: 398 [2020-07-21 22:27:27,951 INFO L226 Difference]: Without dead ends: 386 [2020-07-21 22:27:27,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 943 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:27:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-07-21 22:27:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 307. [2020-07-21 22:27:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-07-21 22:27:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 608 transitions. [2020-07-21 22:27:28,018 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 608 transitions. Word has length 488 [2020-07-21 22:27:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:27:28,019 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 608 transitions. [2020-07-21 22:27:28,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:27:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 608 transitions. [2020-07-21 22:27:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 22:27:28,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:27:28,032 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 26, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:27:28,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:27:28,246 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:27:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:27:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2104791417, now seen corresponding path program 57 times [2020-07-21 22:27:28,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:27:28,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246811444] [2020-07-21 22:27:28,248 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 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:27:29,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:27:29,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:27:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:27:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:27:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 583 proven. 653 refuted. 0 times theorem prover too weak. 5164 trivial. 0 not checked. [2020-07-21 22:27:29,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:27:32,508 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:27:32,616 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:27:32,731 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:27:32,842 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:27:32,951 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:27:33,054 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:37,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:39,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:39,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:40,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:40,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:40,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:40,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:41,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:41,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:42,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 580 proven. 677 refuted. 0 times theorem prover too weak. 5143 trivial. 0 not checked. [2020-07-21 22:27:43,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246811444] [2020-07-21 22:27:43,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:27:43,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 22:27:43,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831622629] [2020-07-21 22:27:43,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:27:43,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:27:43,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:27:43,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:27:43,762 INFO L87 Difference]: Start difference. First operand 307 states and 608 transitions. Second operand 21 states. [2020-07-21 22:27:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:27:45,110 INFO L93 Difference]: Finished difference Result 409 states and 782 transitions. [2020-07-21 22:27:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:27:45,115 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 474 [2020-07-21 22:27:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:27:45,124 INFO L225 Difference]: With dead ends: 409 [2020-07-21 22:27:45,124 INFO L226 Difference]: Without dead ends: 397 [2020-07-21 22:27:45,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 913 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:27:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-07-21 22:27:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 302. [2020-07-21 22:27:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-07-21 22:27:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 597 transitions. [2020-07-21 22:27:45,164 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 597 transitions. Word has length 474 [2020-07-21 22:27:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:27:45,164 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 597 transitions. [2020-07-21 22:27:45,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:27:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 597 transitions. [2020-07-21 22:27:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 22:27:45,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:27:45,172 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 28, 27, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:27:45,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:27:45,373 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:27:45,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:27:45,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1765209507, now seen corresponding path program 58 times [2020-07-21 22:27:45,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:27:45,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767158291] [2020-07-21 22:27:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:27:46,439 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:27:46,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:27:46,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:27:46,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:27:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 508 proven. 636 refuted. 0 times theorem prover too weak. 5993 trivial. 0 not checked. [2020-07-21 22:27:46,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:27:53,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:53,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:54,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:54,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:55,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:55,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:56,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:56,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:56,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:56,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:57,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 510 proven. 648 refuted. 0 times theorem prover too weak. 5979 trivial. 0 not checked. [2020-07-21 22:27:59,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767158291] [2020-07-21 22:27:59,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:27:59,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:27:59,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89273137] [2020-07-21 22:27:59,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:27:59,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:27:59,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:27:59,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:27:59,130 INFO L87 Difference]: Start difference. First operand 302 states and 597 transitions. Second operand 19 states. [2020-07-21 22:28:00,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:28:00,395 INFO L93 Difference]: Finished difference Result 422 states and 833 transitions. [2020-07-21 22:28:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:28:00,402 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 500 [2020-07-21 22:28:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:28:00,411 INFO L225 Difference]: With dead ends: 422 [2020-07-21 22:28:00,412 INFO L226 Difference]: Without dead ends: 399 [2020-07-21 22:28:00,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 969 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:28:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-07-21 22:28:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 281. [2020-07-21 22:28:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-07-21 22:28:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 551 transitions. [2020-07-21 22:28:00,472 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 551 transitions. Word has length 500 [2020-07-21 22:28:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:28:00,473 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 551 transitions. [2020-07-21 22:28:00,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:28:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 551 transitions. [2020-07-21 22:28:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 22:28:00,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:28:00,483 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 29, 26, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:28:00,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:00,688 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:28:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:28:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1401880287, now seen corresponding path program 59 times [2020-07-21 22:28:00,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:28:00,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697508074] [2020-07-21 22:28:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:28:01,760 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:28:01,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:28:01,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:28:01,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:28:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7139 backedges. 381 proven. 763 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2020-07-21 22:28:02,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:28:04,939 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 22:28:09,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:12,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:13,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:13,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:13,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:13,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:14,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:14,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7139 backedges. 383 proven. 775 refuted. 0 times theorem prover too weak. 5981 trivial. 0 not checked. [2020-07-21 22:28:15,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697508074] [2020-07-21 22:28:15,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:28:15,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:28:15,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502916417] [2020-07-21 22:28:15,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:28:15,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:28:15,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:28:15,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:28:15,481 INFO L87 Difference]: Start difference. First operand 281 states and 551 transitions. Second operand 19 states. [2020-07-21 22:28:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:28:16,571 INFO L93 Difference]: Finished difference Result 321 states and 602 transitions. [2020-07-21 22:28:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:28:16,575 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 500 [2020-07-21 22:28:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:28:16,581 INFO L225 Difference]: With dead ends: 321 [2020-07-21 22:28:16,582 INFO L226 Difference]: Without dead ends: 296 [2020-07-21 22:28:16,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 969 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:28:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-21 22:28:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 275. [2020-07-21 22:28:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-07-21 22:28:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 540 transitions. [2020-07-21 22:28:16,630 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 540 transitions. Word has length 500 [2020-07-21 22:28:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:28:16,631 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 540 transitions. [2020-07-21 22:28:16,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:28:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 540 transitions. [2020-07-21 22:28:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-07-21 22:28:16,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:28:16,637 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 28, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 13, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:28:16,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:16,838 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:28:16,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:28:16,839 INFO L82 PathProgramCache]: Analyzing trace with hash -154040949, now seen corresponding path program 60 times [2020-07-21 22:28:16,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:28:16,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541272721] [2020-07-21 22:28:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:17,980 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:28:17,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:28:17,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:28:17,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:28:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5771 backedges. 853 proven. 118 refuted. 0 times theorem prover too weak. 4800 trivial. 0 not checked. [2020-07-21 22:28:18,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:28:22,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:23,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:23,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:23,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:23,997 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:28:24,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:24,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:24,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:24,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:24,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:26,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5771 backedges. 855 proven. 132 refuted. 0 times theorem prover too weak. 4784 trivial. 0 not checked. [2020-07-21 22:28:29,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541272721] [2020-07-21 22:28:29,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:28:29,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:28:29,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455245967] [2020-07-21 22:28:29,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:28:29,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:28:29,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:28:29,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:28:29,346 INFO L87 Difference]: Start difference. First operand 275 states and 540 transitions. Second operand 17 states. [2020-07-21 22:28:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:28:30,404 INFO L93 Difference]: Finished difference Result 341 states and 654 transitions. [2020-07-21 22:28:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:28:30,404 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 451 [2020-07-21 22:28:30,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:28:30,411 INFO L225 Difference]: With dead ends: 341 [2020-07-21 22:28:30,411 INFO L226 Difference]: Without dead ends: 328 [2020-07-21 22:28:30,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 873 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:28:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-07-21 22:28:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 270. [2020-07-21 22:28:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-21 22:28:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 526 transitions. [2020-07-21 22:28:30,450 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 526 transitions. Word has length 451 [2020-07-21 22:28:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:28:30,450 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 526 transitions. [2020-07-21 22:28:30,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:28:30,450 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 526 transitions. [2020-07-21 22:28:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 22:28:30,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:28:30,456 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] [2020-07-21 22:28:30,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:30,658 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:28:30,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:28:30,658 INFO L82 PathProgramCache]: Analyzing trace with hash -142022212, now seen corresponding path program 61 times [2020-07-21 22:28:30,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:28:30,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577466685] [2020-07-21 22:28:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:28:31,838 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:28:31,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:28:31,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:28:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:28:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6785 backedges. 976 proven. 136 refuted. 0 times theorem prover too weak. 5673 trivial. 0 not checked. [2020-07-21 22:28:32,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:28:36,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:36,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:37,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:37,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:38,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:38,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:38,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:38,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:39,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:39,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:40,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6785 backedges. 976 proven. 152 refuted. 0 times theorem prover too weak. 5657 trivial. 0 not checked. [2020-07-21 22:28:43,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577466685] [2020-07-21 22:28:43,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:28:43,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:28:43,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144098140] [2020-07-21 22:28:43,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:28:43,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:28:43,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:28:43,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:28:43,937 INFO L87 Difference]: Start difference. First operand 270 states and 526 transitions. Second operand 17 states. [2020-07-21 22:28:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:28:44,995 INFO L93 Difference]: Finished difference Result 292 states and 553 transitions. [2020-07-21 22:28:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:28:44,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 488 [2020-07-21 22:28:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:28:45,001 INFO L225 Difference]: With dead ends: 292 [2020-07-21 22:28:45,002 INFO L226 Difference]: Without dead ends: 273 [2020-07-21 22:28:45,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 947 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:28:45,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-07-21 22:28:45,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 264. [2020-07-21 22:28:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-21 22:28:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 513 transitions. [2020-07-21 22:28:45,035 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 513 transitions. Word has length 488 [2020-07-21 22:28:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:28:45,035 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 513 transitions. [2020-07-21 22:28:45,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:28:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 513 transitions. [2020-07-21 22:28:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 22:28:45,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:28:45,041 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] [2020-07-21 22:28:45,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:45,243 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:28:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:28:45,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1577557621, now seen corresponding path program 62 times [2020-07-21 22:28:45,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:28:45,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686429627] [2020-07-21 22:28:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:28:46,433 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:28:46,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:28:46,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:28:46,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:28:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 698 proven. 212 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-21 22:28:46,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:28:49,369 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-07-21 22:28:50,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:50,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:52,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:52,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:52,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:52,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:52,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:52,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:53,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:53,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:54,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 698 proven. 222 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-21 22:28:57,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686429627] [2020-07-21 22:28:57,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:28:57,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 22:28:57,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234238305] [2020-07-21 22:28:57,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:28:57,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:28:57,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:28:57,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:28:57,641 INFO L87 Difference]: Start difference. First operand 264 states and 513 transitions. Second operand 17 states. [2020-07-21 22:28:58,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:28:58,686 INFO L93 Difference]: Finished difference Result 323 states and 599 transitions. [2020-07-21 22:28:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:28:58,693 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-21 22:28:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:28:58,699 INFO L225 Difference]: With dead ends: 323 [2020-07-21 22:28:58,699 INFO L226 Difference]: Without dead ends: 297 [2020-07-21 22:28:58,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:28:58,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-07-21 22:28:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 276. [2020-07-21 22:28:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-07-21 22:28:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 529 transitions. [2020-07-21 22:28:58,748 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 529 transitions. Word has length 475 [2020-07-21 22:28:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:28:58,748 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 529 transitions. [2020-07-21 22:28:58,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:28:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 529 transitions. [2020-07-21 22:28:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 22:28:58,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:28:58,755 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 27, 27, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:28:58,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:58,956 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:28:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:28:58,957 INFO L82 PathProgramCache]: Analyzing trace with hash -480895239, now seen corresponding path program 63 times [2020-07-21 22:28:58,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:28:58,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103904603] [2020-07-21 22:28:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:29:00,233 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:29:00,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:29:00,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:29:00,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:29:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 579 proven. 562 refuted. 0 times theorem prover too weak. 5969 trivial. 0 not checked. [2020-07-21 22:29:00,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:29:03,635 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 22:29:03,749 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:29:08,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:09,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:10,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:11,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:11,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:11,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:11,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:12,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 579 proven. 576 refuted. 0 times theorem prover too weak. 5955 trivial. 0 not checked. [2020-07-21 22:29:14,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103904603] [2020-07-21 22:29:14,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:29:14,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:29:14,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564998790] [2020-07-21 22:29:14,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:29:14,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:29:14,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:29:14,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:29:14,325 INFO L87 Difference]: Start difference. First operand 276 states and 529 transitions. Second operand 19 states. [2020-07-21 22:29:15,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:29:15,301 INFO L93 Difference]: Finished difference Result 306 states and 562 transitions. [2020-07-21 22:29:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:29:15,305 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 499 [2020-07-21 22:29:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:29:15,311 INFO L225 Difference]: With dead ends: 306 [2020-07-21 22:29:15,311 INFO L226 Difference]: Without dead ends: 291 [2020-07-21 22:29:15,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 967 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:29:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-07-21 22:29:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 276. [2020-07-21 22:29:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-07-21 22:29:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 527 transitions. [2020-07-21 22:29:15,339 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 527 transitions. Word has length 499 [2020-07-21 22:29:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:29:15,339 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 527 transitions. [2020-07-21 22:29:15,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:29:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 527 transitions. [2020-07-21 22:29:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 22:29:15,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:29:15,346 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 26, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:29:15,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:29:15,547 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:29:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:29:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1058717701, now seen corresponding path program 64 times [2020-07-21 22:29:15,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:29:15,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630214369] [2020-07-21 22:29:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:29:16,745 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:29:16,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:29:16,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:29:16,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:29:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6388 backedges. 800 proven. 278 refuted. 0 times theorem prover too weak. 5310 trivial. 0 not checked. [2020-07-21 22:29:17,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:29:20,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:21,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:21,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:22,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:22,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:22,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:22,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:22,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:23,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:23,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6388 backedges. 800 proven. 292 refuted. 0 times theorem prover too weak. 5296 trivial. 0 not checked. [2020-07-21 22:29:25,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630214369] [2020-07-21 22:29:25,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:29:25,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:29:25,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224477423] [2020-07-21 22:29:25,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:29:25,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:29:25,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:29:25,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:29:25,599 INFO L87 Difference]: Start difference. First operand 276 states and 527 transitions. Second operand 19 states. [2020-07-21 22:29:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:29:26,486 INFO L93 Difference]: Finished difference Result 347 states and 648 transitions. [2020-07-21 22:29:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:29:26,491 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 474 [2020-07-21 22:29:26,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:29:26,498 INFO L225 Difference]: With dead ends: 347 [2020-07-21 22:29:26,499 INFO L226 Difference]: Without dead ends: 332 [2020-07-21 22:29:26,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 917 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:29:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-07-21 22:29:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 276. [2020-07-21 22:29:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-07-21 22:29:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 527 transitions. [2020-07-21 22:29:26,534 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 527 transitions. Word has length 474 [2020-07-21 22:29:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:29:26,535 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 527 transitions. [2020-07-21 22:29:26,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:29:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 527 transitions. [2020-07-21 22:29:26,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-21 22:29:26,541 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:29:26,541 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 31, 31, 27, 26, 18, 18, 18, 18, 18, 18, 18, 15, 15, 15, 15, 15, 15, 15, 12, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:29:26,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:29:26,742 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:29:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:29:26,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1816778994, now seen corresponding path program 65 times [2020-07-21 22:29:26,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:29:26,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833150412] [2020-07-21 22:29:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:29:27,951 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:29:27,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:29:27,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:29:27,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:29:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6088 backedges. 466 proven. 415 refuted. 0 times theorem prover too weak. 5207 trivial. 0 not checked. [2020-07-21 22:29:28,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:29:31,093 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:29:32,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:32,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:32,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:33,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:33,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:33,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:33,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:33,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:34,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6088 backedges. 466 proven. 425 refuted. 0 times theorem prover too weak. 5197 trivial. 0 not checked. [2020-07-21 22:29:35,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833150412] [2020-07-21 22:29:35,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:29:35,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 22:29:35,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366647705] [2020-07-21 22:29:35,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:29:35,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:29:35,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:29:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:29:35,419 INFO L87 Difference]: Start difference. First operand 276 states and 527 transitions. Second operand 17 states. [2020-07-21 22:29:36,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:29:36,088 INFO L93 Difference]: Finished difference Result 308 states and 561 transitions. [2020-07-21 22:29:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:29:36,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 462 [2020-07-21 22:29:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:29:36,099 INFO L225 Difference]: With dead ends: 308 [2020-07-21 22:29:36,099 INFO L226 Difference]: Without dead ends: 285 [2020-07-21 22:29:36,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 897 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:29:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-21 22:29:36,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 267. [2020-07-21 22:29:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-07-21 22:29:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 514 transitions. [2020-07-21 22:29:36,139 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 514 transitions. Word has length 462 [2020-07-21 22:29:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:29:36,140 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 514 transitions. [2020-07-21 22:29:36,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:29:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 514 transitions. [2020-07-21 22:29:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-21 22:29:36,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:29:36,146 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] [2020-07-21 22:29:36,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:29:36,347 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:29:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:29:36,348 INFO L82 PathProgramCache]: Analyzing trace with hash -778040446, now seen corresponding path program 66 times [2020-07-21 22:29:36,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:29:36,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619747566] [2020-07-21 22:29:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:29:37,601 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:29:37,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:29:37,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:29:37,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:29:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 679 proven. 125 refuted. 0 times theorem prover too weak. 5252 trivial. 0 not checked. [2020-07-21 22:29:37,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:29:39,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:39,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:40,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:40,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:40,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:40,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:40,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:40,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:41,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 681 proven. 133 refuted. 0 times theorem prover too weak. 5242 trivial. 0 not checked. [2020-07-21 22:29:43,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619747566] [2020-07-21 22:29:43,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:29:43,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:29:43,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407199660] [2020-07-21 22:29:43,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:29:43,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:29:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:29:43,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:29:43,815 INFO L87 Difference]: Start difference. First operand 267 states and 514 transitions. Second operand 15 states. [2020-07-21 22:29:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:29:44,455 INFO L93 Difference]: Finished difference Result 303 states and 582 transitions. [2020-07-21 22:29:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:29:44,459 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 462 [2020-07-21 22:29:44,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:29:44,465 INFO L225 Difference]: With dead ends: 303 [2020-07-21 22:29:44,465 INFO L226 Difference]: Without dead ends: 287 [2020-07-21 22:29:44,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 899 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:29:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-07-21 22:29:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 258. [2020-07-21 22:29:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-07-21 22:29:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 499 transitions. [2020-07-21 22:29:44,613 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 499 transitions. Word has length 462 [2020-07-21 22:29:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:29:44,614 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 499 transitions. [2020-07-21 22:29:44,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:29:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 499 transitions. [2020-07-21 22:29:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 22:29:44,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:29:44,620 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:29:44,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:29:44,822 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:29:44,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:29:44,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1418469934, now seen corresponding path program 67 times [2020-07-21 22:29:44,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:29:44,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456278321] [2020-07-21 22:29:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:29:46,088 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:29:46,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:29:46,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:29:46,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:29:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 852 proven. 257 refuted. 0 times theorem prover too weak. 5649 trivial. 0 not checked. [2020-07-21 22:29:46,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:29:49,167 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 22:29:49,269 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 22:29:49,573 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-07-21 22:29:50,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:50,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:51,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:51,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:52,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:52,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:52,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:52,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:52,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:53,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 850 proven. 275 refuted. 0 times theorem prover too weak. 5633 trivial. 0 not checked. [2020-07-21 22:29:55,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456278321] [2020-07-21 22:29:55,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:29:55,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:29:55,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207014335] [2020-07-21 22:29:55,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:29:55,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:29:55,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:29:55,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:29:55,964 INFO L87 Difference]: Start difference. First operand 258 states and 499 transitions. Second operand 19 states. [2020-07-21 22:29:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:29:56,971 INFO L93 Difference]: Finished difference Result 282 states and 526 transitions. [2020-07-21 22:29:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:29:56,976 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 22:29:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:29:56,981 INFO L225 Difference]: With dead ends: 282 [2020-07-21 22:29:56,981 INFO L226 Difference]: Without dead ends: 267 [2020-07-21 22:29:56,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:29:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-07-21 22:29:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 255. [2020-07-21 22:29:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-07-21 22:29:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 493 transitions. [2020-07-21 22:29:57,007 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 493 transitions. Word has length 487 [2020-07-21 22:29:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:29:57,008 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 493 transitions. [2020-07-21 22:29:57,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:29:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 493 transitions. [2020-07-21 22:29:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 22:29:57,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:29:57,013 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 29, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 11, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:29:57,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:29:57,214 INFO L427 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:29:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:29:57,216 INFO L82 PathProgramCache]: Analyzing trace with hash -904743519, now seen corresponding path program 68 times [2020-07-21 22:29:57,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:29:57,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489234171] [2020-07-21 22:29:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:29:58,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:29:58,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:29:58,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:29:58,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:29:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6481 backedges. 842 proven. 350 refuted. 0 times theorem prover too weak. 5289 trivial. 0 not checked. [2020-07-21 22:29:58,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:30:02,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:04,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:05,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:05,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:06,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:06,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:06,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:06,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:06,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:07,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6481 backedges. 846 proven. 367 refuted. 0 times theorem prover too weak. 5268 trivial. 0 not checked. [2020-07-21 22:30:09,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489234171] [2020-07-21 22:30:09,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:30:09,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:30:09,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817291433] [2020-07-21 22:30:09,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:30:09,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:30:09,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:30:09,157 INFO L87 Difference]: Start difference. First operand 255 states and 493 transitions. Second operand 19 states. [2020-07-21 22:30:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:10,204 INFO L93 Difference]: Finished difference Result 356 states and 687 transitions. [2020-07-21 22:30:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:30:10,205 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 477 [2020-07-21 22:30:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:10,215 INFO L225 Difference]: With dead ends: 356 [2020-07-21 22:30:10,215 INFO L226 Difference]: Without dead ends: 341 [2020-07-21 22:30:10,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 921 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:30:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-07-21 22:30:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 233. [2020-07-21 22:30:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 22:30:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 443 transitions. [2020-07-21 22:30:10,247 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 443 transitions. Word has length 477 [2020-07-21 22:30:10,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:10,248 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 443 transitions. [2020-07-21 22:30:10,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:30:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 443 transitions. [2020-07-21 22:30:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 22:30:10,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:10,254 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 28, 27, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 11, 11, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:30:10,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:10,455 INFO L427 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1511835198, now seen corresponding path program 69 times [2020-07-21 22:30:10,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:10,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427739386] [2020-07-21 22:30:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:30:11,723 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:30:11,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:11,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:30:11,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 904 proven. 374 refuted. 0 times theorem prover too weak. 5539 trivial. 0 not checked. [2020-07-21 22:30:12,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:30:16,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:18,242 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 22:30:18,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:19,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:19,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:20,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:20,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:20,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:20,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:20,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:21,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 901 proven. 398 refuted. 0 times theorem prover too weak. 5518 trivial. 0 not checked. [2020-07-21 22:30:23,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427739386] [2020-07-21 22:30:23,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:30:23,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 22:30:23,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836518611] [2020-07-21 22:30:23,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:30:23,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:23,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:30:23,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:30:23,885 INFO L87 Difference]: Start difference. First operand 233 states and 443 transitions. Second operand 21 states. [2020-07-21 22:30:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:25,194 INFO L93 Difference]: Finished difference Result 370 states and 715 transitions. [2020-07-21 22:30:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:30:25,196 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 488 [2020-07-21 22:30:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:25,204 INFO L225 Difference]: With dead ends: 370 [2020-07-21 22:30:25,204 INFO L226 Difference]: Without dead ends: 347 [2020-07-21 22:30:25,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 941 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:30:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-07-21 22:30:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 220. [2020-07-21 22:30:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-21 22:30:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 415 transitions. [2020-07-21 22:30:25,228 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 415 transitions. Word has length 488 [2020-07-21 22:30:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:25,229 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 415 transitions. [2020-07-21 22:30:25,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:30:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 415 transitions. [2020-07-21 22:30:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 22:30:25,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:25,234 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] [2020-07-21 22:30:25,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:25,435 INFO L427 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:25,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1712062711, now seen corresponding path program 70 times [2020-07-21 22:30:25,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:25,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620995648] [2020-07-21 22:30:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:30:26,660 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:30:26,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:26,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:30:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 797 proven. 342 refuted. 0 times theorem prover too weak. 5983 trivial. 0 not checked. [2020-07-21 22:30:27,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:30:30,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:30,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:31,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:32,268 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 22:30:32,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:32,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:33,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:33,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:33,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:33,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:33,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:34,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 797 proven. 358 refuted. 0 times theorem prover too weak. 5967 trivial. 0 not checked. [2020-07-21 22:30:36,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620995648] [2020-07-21 22:30:36,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:30:36,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:30:36,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239179837] [2020-07-21 22:30:36,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:30:36,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:36,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:30:36,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:30:36,188 INFO L87 Difference]: Start difference. First operand 220 states and 415 transitions. Second operand 19 states. [2020-07-21 22:30:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:36,901 INFO L93 Difference]: Finished difference Result 271 states and 513 transitions. [2020-07-21 22:30:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:30:36,905 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 499 [2020-07-21 22:30:36,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:36,911 INFO L225 Difference]: With dead ends: 271 [2020-07-21 22:30:36,911 INFO L226 Difference]: Without dead ends: 248 [2020-07-21 22:30:36,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 967 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:30:36,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-07-21 22:30:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 192. [2020-07-21 22:30:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-21 22:30:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 356 transitions. [2020-07-21 22:30:36,931 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 356 transitions. Word has length 499 [2020-07-21 22:30:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:36,931 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 356 transitions. [2020-07-21 22:30:36,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:30:36,931 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 356 transitions. [2020-07-21 22:30:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 22:30:36,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:36,935 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] [2020-07-21 22:30:37,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:37,137 INFO L427 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:37,138 INFO L82 PathProgramCache]: Analyzing trace with hash 516830041, now seen corresponding path program 71 times [2020-07-21 22:30:37,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:37,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663908284] [2020-07-21 22:30:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:30:38,395 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:30:38,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:38,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:30:38,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 785 proven. 125 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-21 22:30:38,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:30:41,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:41,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:41,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:42,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:42,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:42,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:42,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:42,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:43,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:43,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 783 proven. 137 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-21 22:30:45,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663908284] [2020-07-21 22:30:45,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:30:45,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 22:30:45,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748858106] [2020-07-21 22:30:45,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:30:45,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:45,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:30:45,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:30:45,910 INFO L87 Difference]: Start difference. First operand 192 states and 356 transitions. Second operand 17 states. [2020-07-21 22:30:46,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:46,533 INFO L93 Difference]: Finished difference Result 202 states and 366 transitions. [2020-07-21 22:30:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:30:46,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-21 22:30:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:46,537 INFO L225 Difference]: With dead ends: 202 [2020-07-21 22:30:46,537 INFO L226 Difference]: Without dead ends: 189 [2020-07-21 22:30:46,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:30:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-07-21 22:30:46,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 184. [2020-07-21 22:30:46,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-21 22:30:46,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 337 transitions. [2020-07-21 22:30:46,555 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 337 transitions. Word has length 475 [2020-07-21 22:30:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:46,555 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 337 transitions. [2020-07-21 22:30:46,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:30:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 337 transitions. [2020-07-21 22:30:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 22:30:46,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:46,559 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] [2020-07-21 22:30:46,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:46,760 INFO L427 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1570124953, now seen corresponding path program 72 times [2020-07-21 22:30:46,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:46,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758665803] [2020-07-21 22:30:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:30:48,130 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:30:48,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:48,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:30:48,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 772 proven. 138 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-21 22:30:48,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:30:51,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:51,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:51,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:52,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:52,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:52,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:52,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:52,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:53,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 770 proven. 150 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-21 22:30:55,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758665803] [2020-07-21 22:30:55,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:30:55,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 22:30:55,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790212504] [2020-07-21 22:30:55,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:30:55,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:30:55,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:30:55,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:30:55,591 INFO L87 Difference]: Start difference. First operand 184 states and 337 transitions. Second operand 17 states. [2020-07-21 22:30:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:30:56,248 INFO L93 Difference]: Finished difference Result 240 states and 442 transitions. [2020-07-21 22:30:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:30:56,252 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-21 22:30:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:30:56,257 INFO L225 Difference]: With dead ends: 240 [2020-07-21 22:30:56,257 INFO L226 Difference]: Without dead ends: 227 [2020-07-21 22:30:56,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:30:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-07-21 22:30:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2020-07-21 22:30:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-21 22:30:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 321 transitions. [2020-07-21 22:30:56,276 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 321 transitions. Word has length 475 [2020-07-21 22:30:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:30:56,276 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 321 transitions. [2020-07-21 22:30:56,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:30:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 321 transitions. [2020-07-21 22:30:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 22:30:56,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:30:56,279 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] [2020-07-21 22:30:56,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:30:56,480 INFO L427 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:30:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:30:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash -582108663, now seen corresponding path program 73 times [2020-07-21 22:30:56,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:30:56,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826762507] [2020-07-21 22:30:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:30:57,741 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:30:57,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:30:57,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:30:57,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 930 proven. 151 refuted. 0 times theorem prover too weak. 5333 trivial. 0 not checked. [2020-07-21 22:30:58,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:31:01,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:01,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:02,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:02,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:03,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:04,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:05,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 928 proven. 167 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-21 22:31:07,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826762507] [2020-07-21 22:31:07,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:31:07,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 22:31:07,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418278295] [2020-07-21 22:31:07,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:31:07,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:31:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:31:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:31:07,390 INFO L87 Difference]: Start difference. First operand 178 states and 321 transitions. Second operand 19 states. [2020-07-21 22:31:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:31:08,405 INFO L93 Difference]: Finished difference Result 222 states and 399 transitions. [2020-07-21 22:31:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:31:08,405 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-21 22:31:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:31:08,409 INFO L225 Difference]: With dead ends: 222 [2020-07-21 22:31:08,409 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 22:31:08,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:31:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 22:31:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 137. [2020-07-21 22:31:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 22:31:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 240 transitions. [2020-07-21 22:31:08,424 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 240 transitions. Word has length 475 [2020-07-21 22:31:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:31:08,424 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 240 transitions. [2020-07-21 22:31:08,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:31:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 240 transitions. [2020-07-21 22:31:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 22:31:08,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:31:08,428 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] [2020-07-21 22:31:08,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:08,642 INFO L427 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:31:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:31:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash -477489234, now seen corresponding path program 74 times [2020-07-21 22:31:08,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:31:08,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308918191] [2020-07-21 22:31:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:31:09,800 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:31:09,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:31:09,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:31:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:31:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 228 proven. 1086 refuted. 0 times theorem prover too weak. 4795 trivial. 0 not checked. [2020-07-21 22:31:10,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:31:17,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:17,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:19,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:19,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:21,001 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 22:31:21,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:21,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:22,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:22,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:22,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:22,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:23,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:23,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:23,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 234 proven. 1110 refuted. 0 times theorem prover too weak. 4765 trivial. 0 not checked. [2020-07-21 22:31:23,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308918191] [2020-07-21 22:31:23,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:31:23,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:31:23,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920575649] [2020-07-21 22:31:23,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:31:23,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:31:23,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:31:23,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:31:23,413 INFO L87 Difference]: Start difference. First operand 137 states and 240 transitions. Second operand 21 states. [2020-07-21 22:31:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:31:24,843 INFO L93 Difference]: Finished difference Result 236 states and 444 transitions. [2020-07-21 22:31:24,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:31:24,848 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 464 [2020-07-21 22:31:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:31:24,853 INFO L225 Difference]: With dead ends: 236 [2020-07-21 22:31:24,853 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 22:31:24,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 891 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:31:24,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 22:31:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-21 22:31:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 22:31:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 189 transitions. [2020-07-21 22:31:24,872 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 189 transitions. Word has length 464 [2020-07-21 22:31:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:31:24,872 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 189 transitions. [2020-07-21 22:31:24,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:31:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 189 transitions. [2020-07-21 22:31:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 22:31:24,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:31:24,875 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] [2020-07-21 22:31:25,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:25,076 INFO L427 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:31:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:31:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash 759223819, now seen corresponding path program 75 times [2020-07-21 22:31:25,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:31:25,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439064835] [2020-07-21 22:31:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:31:26,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:31:26,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:31:26,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:31:26,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:31:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 258 proven. 982 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-21 22:31:26,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:31:29,126 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-07-21 22:31:32,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:34,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:35,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:35,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:36,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:37,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:37,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:37,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:37,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 259 proven. 1002 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-21 22:31:37,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439064835] [2020-07-21 22:31:37,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:31:37,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 22:31:37,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289716359] [2020-07-21 22:31:37,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:31:37,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:31:37,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:31:37,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:31:37,582 INFO L87 Difference]: Start difference. First operand 134 states and 189 transitions. Second operand 21 states. [2020-07-21 22:31:38,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:31:38,677 INFO L93 Difference]: Finished difference Result 220 states and 301 transitions. [2020-07-21 22:31:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:31:38,682 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-21 22:31:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:31:38,686 INFO L225 Difference]: With dead ends: 220 [2020-07-21 22:31:38,686 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 22:31:38,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:31:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 22:31:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2020-07-21 22:31:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 22:31:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2020-07-21 22:31:38,698 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 475 [2020-07-21 22:31:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:31:38,698 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2020-07-21 22:31:38,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:31:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2020-07-21 22:31:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 22:31:38,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:31:38,701 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] [2020-07-21 22:31:38,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:38,903 INFO L427 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:31:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:31:38,903 INFO L82 PathProgramCache]: Analyzing trace with hash -247769445, now seen corresponding path program 76 times [2020-07-21 22:31:38,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:31:38,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029709556] [2020-07-21 22:31:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_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 [2020-07-21 22:31:40,258 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:31:40,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:31:40,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 22:31:40,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:31:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 258 proven. 1140 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2020-07-21 22:31:40,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:31:43,165 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:31:43,273 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:31:43,390 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:31:43,504 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:31:43,616 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:31:43,796 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-07-21 22:31:47,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:47,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:50,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:51,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:52,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:52,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:53,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:53,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:53,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:54,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 255 proven. 1173 refuted. 0 times theorem prover too weak. 4986 trivial. 0 not checked. [2020-07-21 22:31:54,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029709556] [2020-07-21 22:31:54,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:31:54,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 23 [2020-07-21 22:31:54,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806428321] [2020-07-21 22:31:54,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:31:54,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:31:54,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:31:54,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:31:54,348 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand 23 states. [2020-07-21 22:31:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:31:55,702 INFO L93 Difference]: Finished difference Result 203 states and 251 transitions. [2020-07-21 22:31:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:31:55,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 475 [2020-07-21 22:31:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:31:55,710 INFO L225 Difference]: With dead ends: 203 [2020-07-21 22:31:55,711 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:31:55,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 911 SyntacticMatches, 17 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2020-07-21 22:31:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:31:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:31:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:31:55,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:31:55,716 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 475 [2020-07-21 22:31:55,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:31:55,716 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:31:55,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:31:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:31:55,717 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:31:55,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:31:55,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:32:06,919 WARN L193 SmtUtils]: Spent 9.78 s on a formula simplification. DAG size of input: 717 DAG size of output: 249 [2020-07-21 22:32:14,763 WARN L193 SmtUtils]: Spent 7.84 s on a formula simplification. DAG size of input: 706 DAG size of output: 250 [2020-07-21 22:32:23,188 WARN L193 SmtUtils]: Spent 8.42 s on a formula simplification. DAG size of input: 714 DAG size of output: 249 [2020-07-21 22:32:31,264 WARN L193 SmtUtils]: Spent 8.07 s on a formula simplification. DAG size of input: 713 DAG size of output: 251 [2020-07-21 22:32:40,319 WARN L193 SmtUtils]: Spent 9.02 s on a formula simplification. DAG size of input: 745 DAG size of output: 247 [2020-07-21 22:32:40,825 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 71 [2020-07-21 22:32:41,174 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 72 [2020-07-21 22:32:44,231 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 491 DAG size of output: 183 [2020-07-21 22:32:52,001 WARN L193 SmtUtils]: Spent 7.77 s on a formula simplification. DAG size of input: 703 DAG size of output: 250 [2020-07-21 22:32:52,571 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 92 [2020-07-21 22:32:54,883 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 491 DAG size of output: 183 [2020-07-21 22:32:58,248 WARN L193 SmtUtils]: Spent 3.36 s on a formula simplification. DAG size of input: 547 DAG size of output: 190 [2020-07-21 22:32:58,596 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 72 [2020-07-21 22:32:58,984 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 71 [2020-07-21 22:32:59,175 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 64 [2020-07-21 22:32:59,527 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 72 [2020-07-21 22:33:07,725 WARN L193 SmtUtils]: Spent 8.19 s on a formula simplification. DAG size of input: 724 DAG size of output: 255 [2020-07-21 22:33:08,340 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 109