/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:59:14,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:59:14,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:59:14,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:59:14,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:59:14,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:59:14,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:59:14,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:59:14,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:59:14,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:59:14,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:59:14,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:59:14,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:59:14,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:59:14,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:59:14,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:59:14,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:59:14,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:59:14,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:59:14,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:59:14,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:59:14,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:59:14,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:59:14,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:59:14,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:59:14,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:59:14,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:59:14,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:59:14,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 15:59:14,872 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:59:14,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:59:14,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:59:14,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:59:14,876 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:59:14,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:59:14,876 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:59:14,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:59:14,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:59:14,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:59:14,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:59:14,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:59:14,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:59:14,878 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:59:14,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:59:14,878 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:59:14,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:59:14,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:59:14,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:59:14,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:59:14,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:59:14,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:59:14,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:59:14,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:59:14,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:59:14,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:59:14,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:14,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:59:14,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:59:14,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:59:15,276 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:59:15,298 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:59:15,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:59:15,307 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:59:15,308 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:59:15,310 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c [2020-07-21 15:59:15,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72c7d7fb7/0e645ce5369546bab81b2d55882a4cdf/FLAG62bfd3cb1 [2020-07-21 15:59:16,165 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:59:16,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c [2020-07-21 15:59:16,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72c7d7fb7/0e645ce5369546bab81b2d55882a4cdf/FLAG62bfd3cb1 [2020-07-21 15:59:16,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72c7d7fb7/0e645ce5369546bab81b2d55882a4cdf [2020-07-21 15:59:16,478 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:59:16,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:59:16,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:59:16,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:59:16,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:59:16,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:59:16" (1/1) ... [2020-07-21 15:59:16,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a86e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:16, skipping insertion in model container [2020-07-21 15:59:16,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:59:16" (1/1) ... [2020-07-21 15:59:16,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:59:16,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:59:16,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:59:16,882 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:59:16,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:59:16,934 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:59:16,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:16 WrapperNode [2020-07-21 15:59:16,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:59:16,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:59:16,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:59:16,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:59:16,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:16" (1/1) ... [2020-07-21 15:59:16,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:16" (1/1) ... [2020-07-21 15:59:16,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:16" (1/1) ... [2020-07-21 15:59:16,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:16" (1/1) ... [2020-07-21 15:59:17,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:16" (1/1) ... [2020-07-21 15:59:17,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:16" (1/1) ... [2020-07-21 15:59:17,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:16" (1/1) ... [2020-07-21 15:59:17,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:59:17,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:59:17,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:59:17,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:59:17,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:59:17,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:59:17,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:59:17,207 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 15:59:17,207 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 15:59:17,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:59:17,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:59:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:59:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 15:59:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 15:59:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:59:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:59:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:59:17,528 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:59:17,529 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:59:17,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:59:17 BoogieIcfgContainer [2020-07-21 15:59:17,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:59:17,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:59:17,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:59:17,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:59:17,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:59:16" (1/3) ... [2020-07-21 15:59:17,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a48b169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:59:17, skipping insertion in model container [2020-07-21 15:59:17,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:59:16" (2/3) ... [2020-07-21 15:59:17,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a48b169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:59:17, skipping insertion in model container [2020-07-21 15:59:17,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:59:17" (3/3) ... [2020-07-21 15:59:17,553 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2020-07-21 15:59:17,570 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:59:17,581 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:59:17,601 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:59:17,643 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:59:17,643 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:59:17,643 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:59:17,644 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:59:17,644 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:59:17,644 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:59:17,644 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:59:17,644 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:59:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 15:59:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 15:59:17,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:17,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:17,689 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:17,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 15:59:17,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:17,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327503038] [2020-07-21 15:59:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:17,816 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:17,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:17,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:59:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:59:18,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:59:18,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327503038] [2020-07-21 15:59:18,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:59:18,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:59:18,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763265823] [2020-07-21 15:59:18,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:59:18,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:18,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:59:18,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:59:18,061 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 15:59:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:18,263 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 15:59:18,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:59:18,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 15:59:18,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:18,282 INFO L225 Difference]: With dead ends: 44 [2020-07-21 15:59:18,282 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 15:59:18,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:59:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 15:59:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 15:59:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 15:59:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 15:59:18,357 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 15:59:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:18,358 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 15:59:18,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:59:18,358 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 15:59:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 15:59:18,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:18,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:18,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:18,564 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:18,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 15:59:18,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:18,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394099324] [2020-07-21 15:59:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:18,606 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:18,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:18,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:59:18,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:59:18,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:59:18,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394099324] [2020-07-21 15:59:18,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:59:18,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:59:18,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088619136] [2020-07-21 15:59:18,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:59:18,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:18,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:59:18,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:59:18,663 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 15:59:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:18,782 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 15:59:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:59:18,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 15:59:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:18,787 INFO L225 Difference]: With dead ends: 36 [2020-07-21 15:59:18,788 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 15:59:18,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:59:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 15:59:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 15:59:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 15:59:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 15:59:18,804 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 15:59:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:18,805 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 15:59:18,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:59:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 15:59:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 15:59:18,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:18,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:19,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:19,024 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:19,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 15:59:19,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:19,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834741668] [2020-07-21 15:59:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:19,074 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:19,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:19,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:59:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:59:19,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:19,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:19,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:59:19,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834741668] [2020-07-21 15:59:19,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:19,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 15:59:19,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265711245] [2020-07-21 15:59:19,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:59:19,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:19,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:59:19,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:59:19,515 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 15:59:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:19,794 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 15:59:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:59:19,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 15:59:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:19,799 INFO L225 Difference]: With dead ends: 41 [2020-07-21 15:59:19,799 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 15:59:19,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:59:19,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 15:59:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 15:59:19,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 15:59:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 15:59:19,813 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 15:59:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:19,814 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 15:59:19,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:59:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 15:59:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 15:59:19,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:19,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:20,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:20,033 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:20,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:20,035 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 15:59:20,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:20,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713629518] [2020-07-21 15:59:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:20,081 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:20,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:20,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:59:20,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:59:20,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:20,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:20,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 15:59:20,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713629518] [2020-07-21 15:59:20,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:20,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 15:59:20,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305507841] [2020-07-21 15:59:20,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:59:20,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:59:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:59:20,446 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 15:59:20,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:20,674 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 15:59:20,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:59:20,675 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 15:59:20,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:20,678 INFO L225 Difference]: With dead ends: 46 [2020-07-21 15:59:20,678 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 15:59:20,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:59:20,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 15:59:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 15:59:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 15:59:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 15:59:20,693 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 15:59:20,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:20,694 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 15:59:20,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:59:20,694 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 15:59:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 15:59:20,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:20,697 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:20,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:20,913 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:20,913 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 15:59:20,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:20,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150632605] [2020-07-21 15:59:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:20,966 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:20,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:20,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:59:20,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 15:59:21,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:21,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:21,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:21,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:59:21,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150632605] [2020-07-21 15:59:21,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:21,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 15:59:21,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13003424] [2020-07-21 15:59:21,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:59:21,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:21,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:59:21,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:59:21,539 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 15:59:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:21,765 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 15:59:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:59:21,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 15:59:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:21,771 INFO L225 Difference]: With dead ends: 51 [2020-07-21 15:59:21,772 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 15:59:21,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:59:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 15:59:21,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 15:59:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 15:59:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 15:59:21,803 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 15:59:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:21,804 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 15:59:21,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:59:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 15:59:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 15:59:21,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:21,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:22,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:22,019 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:22,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:22,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 15:59:22,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:22,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560012346] [2020-07-21 15:59:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:22,057 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:22,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:22,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:59:22,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 15:59:22,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:22,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:22,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 15:59:22,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560012346] [2020-07-21 15:59:22,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:22,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-21 15:59:22,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144487092] [2020-07-21 15:59:22,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:59:22,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:22,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:59:22,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:59:22,530 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 15:59:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:22,903 INFO L93 Difference]: Finished difference Result 84 states and 136 transitions. [2020-07-21 15:59:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:59:22,904 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 15:59:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:22,907 INFO L225 Difference]: With dead ends: 84 [2020-07-21 15:59:22,908 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 15:59:22,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:59:22,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 15:59:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-07-21 15:59:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 15:59:22,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2020-07-21 15:59:22,926 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 40 [2020-07-21 15:59:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:22,927 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 67 transitions. [2020-07-21 15:59:22,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:59:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 67 transitions. [2020-07-21 15:59:22,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 15:59:22,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:22,931 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:23,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:23,142 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:23,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:23,143 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-07-21 15:59:23,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:23,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807729097] [2020-07-21 15:59:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:23,189 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:23,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:23,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:59:23,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:59:23,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:23,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:23,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:59:23,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807729097] [2020-07-21 15:59:23,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:23,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 15:59:23,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813039895] [2020-07-21 15:59:23,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:59:23,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:23,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:59:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:59:23,733 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand 12 states. [2020-07-21 15:59:23,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:23,966 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-07-21 15:59:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:59:23,968 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-07-21 15:59:23,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:23,972 INFO L225 Difference]: With dead ends: 63 [2020-07-21 15:59:23,973 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 15:59:23,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:59:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 15:59:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-07-21 15:59:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 15:59:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 77 transitions. [2020-07-21 15:59:23,994 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 77 transitions. Word has length 41 [2020-07-21 15:59:23,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:23,995 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 77 transitions. [2020-07-21 15:59:23,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:59:23,995 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 77 transitions. [2020-07-21 15:59:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 15:59:23,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:23,999 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:24,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:24,214 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:24,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:24,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1291563674, now seen corresponding path program 1 times [2020-07-21 15:59:24,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:24,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367144904] [2020-07-21 15:59:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:24,261 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:24,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:24,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:59:24,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 15:59:24,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:24,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:24,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 15:59:24,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367144904] [2020-07-21 15:59:24,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:24,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 15:59:24,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525643827] [2020-07-21 15:59:24,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:59:24,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:24,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:59:24,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:59:24,676 INFO L87 Difference]: Start difference. First operand 51 states and 77 transitions. Second operand 10 states. [2020-07-21 15:59:24,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:24,791 INFO L93 Difference]: Finished difference Result 65 states and 105 transitions. [2020-07-21 15:59:24,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:59:24,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-07-21 15:59:24,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:24,797 INFO L225 Difference]: With dead ends: 65 [2020-07-21 15:59:24,797 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 15:59:24,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:59:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 15:59:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-07-21 15:59:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-21 15:59:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 82 transitions. [2020-07-21 15:59:24,811 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 82 transitions. Word has length 53 [2020-07-21 15:59:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:24,811 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 82 transitions. [2020-07-21 15:59:24,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:59:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 82 transitions. [2020-07-21 15:59:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 15:59:24,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:24,814 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:25,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:25,026 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash 736840020, now seen corresponding path program 2 times [2020-07-21 15:59:25,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:25,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763477329] [2020-07-21 15:59:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:25,095 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:25,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:25,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:59:25,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 15:59:25,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:25,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-21 15:59:25,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763477329] [2020-07-21 15:59:25,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:25,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 15:59:25,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698910364] [2020-07-21 15:59:25,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:59:25,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:25,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:59:25,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:59:25,885 INFO L87 Difference]: Start difference. First operand 53 states and 82 transitions. Second operand 14 states. [2020-07-21 15:59:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:26,103 INFO L93 Difference]: Finished difference Result 75 states and 134 transitions. [2020-07-21 15:59:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:59:26,105 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 78 [2020-07-21 15:59:26,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:26,107 INFO L225 Difference]: With dead ends: 75 [2020-07-21 15:59:26,107 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 15:59:26,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:59:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 15:59:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-07-21 15:59:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 15:59:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 90 transitions. [2020-07-21 15:59:26,123 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 90 transitions. Word has length 78 [2020-07-21 15:59:26,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:26,123 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 90 transitions. [2020-07-21 15:59:26,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:59:26,124 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 90 transitions. [2020-07-21 15:59:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 15:59:26,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:26,126 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:26,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:26,340 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:26,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:26,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1583364703, now seen corresponding path program 1 times [2020-07-21 15:59:26,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:26,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353716649] [2020-07-21 15:59:26,343 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:26,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:26,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:26,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:59:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:59:26,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:26,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:26,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-21 15:59:26,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353716649] [2020-07-21 15:59:26,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:26,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-21 15:59:26,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644267367] [2020-07-21 15:59:26,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:59:26,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:26,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:59:26,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:59:26,880 INFO L87 Difference]: Start difference. First operand 56 states and 90 transitions. Second operand 12 states. [2020-07-21 15:59:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:27,102 INFO L93 Difference]: Finished difference Result 114 states and 219 transitions. [2020-07-21 15:59:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:59:27,103 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-07-21 15:59:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:27,106 INFO L225 Difference]: With dead ends: 114 [2020-07-21 15:59:27,106 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 15:59:27,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:59:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 15:59:27,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-07-21 15:59:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:59:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 101 transitions. [2020-07-21 15:59:27,126 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 101 transitions. Word has length 67 [2020-07-21 15:59:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:27,127 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 101 transitions. [2020-07-21 15:59:27,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:59:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 101 transitions. [2020-07-21 15:59:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 15:59:27,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:27,130 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:27,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:27,344 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:27,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:27,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1763147687, now seen corresponding path program 2 times [2020-07-21 15:59:27,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:27,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393421364] [2020-07-21 15:59:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:27,414 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:27,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:27,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:59:27,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-21 15:59:27,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:27,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:28,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:28,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:28,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 15:59:28,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393421364] [2020-07-21 15:59:28,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:28,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2020-07-21 15:59:28,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391059438] [2020-07-21 15:59:28,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:59:28,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:28,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:59:28,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:59:28,285 INFO L87 Difference]: Start difference. First operand 61 states and 101 transitions. Second operand 17 states. [2020-07-21 15:59:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:28,878 INFO L93 Difference]: Finished difference Result 131 states and 252 transitions. [2020-07-21 15:59:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:59:28,879 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-07-21 15:59:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:28,881 INFO L225 Difference]: With dead ends: 131 [2020-07-21 15:59:28,885 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 15:59:28,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:59:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 15:59:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2020-07-21 15:59:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-21 15:59:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 106 transitions. [2020-07-21 15:59:28,921 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 106 transitions. Word has length 68 [2020-07-21 15:59:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:28,922 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 106 transitions. [2020-07-21 15:59:28,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:59:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 106 transitions. [2020-07-21 15:59:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 15:59:28,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:28,925 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:29,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:29,147 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1986769418, now seen corresponding path program 1 times [2020-07-21 15:59:29,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:29,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387351509] [2020-07-21 15:59:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:29,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:29,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:29,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:59:29,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 39 proven. 53 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 15:59:29,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:29,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:29,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:29,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:29,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:30,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:30,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:30,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:30,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:30,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 39 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 15:59:30,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387351509] [2020-07-21 15:59:30,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:30,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2020-07-21 15:59:30,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041176183] [2020-07-21 15:59:30,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:59:30,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:30,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:59:30,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:59:30,434 INFO L87 Difference]: Start difference. First operand 68 states and 106 transitions. Second operand 21 states. [2020-07-21 15:59:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:31,538 INFO L93 Difference]: Finished difference Result 186 states and 366 transitions. [2020-07-21 15:59:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 15:59:31,538 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2020-07-21 15:59:31,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:31,546 INFO L225 Difference]: With dead ends: 186 [2020-07-21 15:59:31,547 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 15:59:31,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 145 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 15:59:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 15:59:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2020-07-21 15:59:31,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-21 15:59:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 179 transitions. [2020-07-21 15:59:31,610 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 179 transitions. Word has length 82 [2020-07-21 15:59:31,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:31,612 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 179 transitions. [2020-07-21 15:59:31,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:59:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 179 transitions. [2020-07-21 15:59:31,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 15:59:31,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:31,618 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:31,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:31,834 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:31,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 3 times [2020-07-21 15:59:31,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:31,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981873129] [2020-07-21 15:59:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:31,911 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:31,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:31,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:59:31,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 15:59:31,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:32,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:32,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:32,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:32,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-21 15:59:32,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981873129] [2020-07-21 15:59:32,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:32,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 15:59:32,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284672603] [2020-07-21 15:59:32,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:59:32,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:32,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:59:32,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:59:32,602 INFO L87 Difference]: Start difference. First operand 110 states and 179 transitions. Second operand 14 states. [2020-07-21 15:59:32,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:32,826 INFO L93 Difference]: Finished difference Result 114 states and 182 transitions. [2020-07-21 15:59:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:59:32,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-07-21 15:59:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:32,829 INFO L225 Difference]: With dead ends: 114 [2020-07-21 15:59:32,830 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 15:59:32,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:59:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 15:59:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2020-07-21 15:59:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 15:59:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 159 transitions. [2020-07-21 15:59:32,849 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 159 transitions. Word has length 68 [2020-07-21 15:59:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:32,849 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 159 transitions. [2020-07-21 15:59:32,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:59:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 159 transitions. [2020-07-21 15:59:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 15:59:32,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:32,853 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:33,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:33,067 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:33,068 INFO L82 PathProgramCache]: Analyzing trace with hash 918304791, now seen corresponding path program 4 times [2020-07-21 15:59:33,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:33,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047076427] [2020-07-21 15:59:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:33,143 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:33,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:33,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:59:33,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 33 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-07-21 15:59:33,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:33,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:33,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:33,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:34,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:34,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:34,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-21 15:59:34,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047076427] [2020-07-21 15:59:34,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:34,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2020-07-21 15:59:34,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128251010] [2020-07-21 15:59:34,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 15:59:34,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 15:59:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:59:34,167 INFO L87 Difference]: Start difference. First operand 102 states and 159 transitions. Second operand 19 states. [2020-07-21 15:59:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:34,797 INFO L93 Difference]: Finished difference Result 269 states and 520 transitions. [2020-07-21 15:59:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 15:59:34,802 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-07-21 15:59:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:34,807 INFO L225 Difference]: With dead ends: 269 [2020-07-21 15:59:34,807 INFO L226 Difference]: Without dead ends: 168 [2020-07-21 15:59:34,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-07-21 15:59:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-21 15:59:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 144. [2020-07-21 15:59:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-21 15:59:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 247 transitions. [2020-07-21 15:59:34,842 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 247 transitions. Word has length 94 [2020-07-21 15:59:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:34,844 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 247 transitions. [2020-07-21 15:59:34,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 15:59:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 247 transitions. [2020-07-21 15:59:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 15:59:34,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:34,847 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:35,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:35,064 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:35,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1676117994, now seen corresponding path program 2 times [2020-07-21 15:59:35,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:35,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969706010] [2020-07-21 15:59:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:35,132 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:35,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:35,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:59:35,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 15:59:35,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:35,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:35,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:35,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:35,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-07-21 15:59:35,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969706010] [2020-07-21 15:59:35,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:35,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 15:59:35,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227017934] [2020-07-21 15:59:35,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:59:35,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:59:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:59:35,583 INFO L87 Difference]: Start difference. First operand 144 states and 247 transitions. Second operand 12 states. [2020-07-21 15:59:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:35,829 INFO L93 Difference]: Finished difference Result 167 states and 289 transitions. [2020-07-21 15:59:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:59:35,830 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-07-21 15:59:35,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:35,835 INFO L225 Difference]: With dead ends: 167 [2020-07-21 15:59:35,835 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 15:59:35,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:59:35,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 15:59:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-07-21 15:59:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-21 15:59:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 272 transitions. [2020-07-21 15:59:35,865 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 272 transitions. Word has length 80 [2020-07-21 15:59:35,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:35,866 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 272 transitions. [2020-07-21 15:59:35,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:59:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 272 transitions. [2020-07-21 15:59:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-21 15:59:35,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:35,871 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:36,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:36,086 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:36,087 INFO L82 PathProgramCache]: Analyzing trace with hash 2019487259, now seen corresponding path program 3 times [2020-07-21 15:59:36,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:36,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845748126] [2020-07-21 15:59:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:36,164 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:36,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:36,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:59:36,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 177 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-07-21 15:59:36,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:37,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:37,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:37,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:37,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:37,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 71 proven. 141 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-21 15:59:37,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845748126] [2020-07-21 15:59:37,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:37,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2020-07-21 15:59:37,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917033623] [2020-07-21 15:59:37,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:59:37,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:37,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:59:37,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:59:37,751 INFO L87 Difference]: Start difference. First operand 157 states and 272 transitions. Second operand 21 states. [2020-07-21 15:59:38,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:38,340 INFO L93 Difference]: Finished difference Result 369 states and 701 transitions. [2020-07-21 15:59:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 15:59:38,341 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 120 [2020-07-21 15:59:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:38,346 INFO L225 Difference]: With dead ends: 369 [2020-07-21 15:59:38,346 INFO L226 Difference]: Without dead ends: 218 [2020-07-21 15:59:38,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 213 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 15:59:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-21 15:59:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 173. [2020-07-21 15:59:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 15:59:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 306 transitions. [2020-07-21 15:59:38,375 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 306 transitions. Word has length 120 [2020-07-21 15:59:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:38,376 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 306 transitions. [2020-07-21 15:59:38,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:59:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 306 transitions. [2020-07-21 15:59:38,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-21 15:59:38,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:38,379 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:38,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:38,594 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:38,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash -923530611, now seen corresponding path program 4 times [2020-07-21 15:59:38,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:38,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116009365] [2020-07-21 15:59:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:38,676 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:38,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:38,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:59:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-07-21 15:59:38,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:38,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:38,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:38,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:39,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 55 proven. 16 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-07-21 15:59:39,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116009365] [2020-07-21 15:59:39,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:39,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 15:59:39,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401987903] [2020-07-21 15:59:39,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:59:39,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:39,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:59:39,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:59:39,098 INFO L87 Difference]: Start difference. First operand 173 states and 306 transitions. Second operand 12 states. [2020-07-21 15:59:39,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:39,276 INFO L93 Difference]: Finished difference Result 191 states and 349 transitions. [2020-07-21 15:59:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:59:39,277 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 92 [2020-07-21 15:59:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:39,282 INFO L225 Difference]: With dead ends: 191 [2020-07-21 15:59:39,283 INFO L226 Difference]: Without dead ends: 187 [2020-07-21 15:59:39,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 169 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:59:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-21 15:59:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 176. [2020-07-21 15:59:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-21 15:59:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 316 transitions. [2020-07-21 15:59:39,313 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 316 transitions. Word has length 92 [2020-07-21 15:59:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:39,354 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 316 transitions. [2020-07-21 15:59:39,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:59:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 316 transitions. [2020-07-21 15:59:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-21 15:59:39,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:39,359 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:39,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:39,574 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:39,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1156827333, now seen corresponding path program 2 times [2020-07-21 15:59:39,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:39,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305665199] [2020-07-21 15:59:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:39,673 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:39,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:59:39,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 21 proven. 119 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 15:59:39,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:40,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:40,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:40,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:40,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:40,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-21 15:59:40,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305665199] [2020-07-21 15:59:40,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:40,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 15:59:40,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972611261] [2020-07-21 15:59:40,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 15:59:40,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:40,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 15:59:40,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:59:40,897 INFO L87 Difference]: Start difference. First operand 176 states and 316 transitions. Second operand 16 states. [2020-07-21 15:59:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:41,166 INFO L93 Difference]: Finished difference Result 206 states and 384 transitions. [2020-07-21 15:59:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:59:41,167 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 118 [2020-07-21 15:59:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:41,170 INFO L225 Difference]: With dead ends: 206 [2020-07-21 15:59:41,171 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 15:59:41,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 212 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:59:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 15:59:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 186. [2020-07-21 15:59:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-07-21 15:59:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 342 transitions. [2020-07-21 15:59:41,195 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 342 transitions. Word has length 118 [2020-07-21 15:59:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:41,195 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 342 transitions. [2020-07-21 15:59:41,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 15:59:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 342 transitions. [2020-07-21 15:59:41,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-21 15:59:41,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:41,200 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:41,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:41,414 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:41,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1781345224, now seen corresponding path program 5 times [2020-07-21 15:59:41,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:41,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331962960] [2020-07-21 15:59:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:41,552 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:41,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:59:41,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 359 proven. 31 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-21 15:59:41,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:42,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:42,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:42,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:42,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:42,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 60 proven. 213 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 15:59:43,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331962960] [2020-07-21 15:59:43,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:43,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2020-07-21 15:59:43,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182728906] [2020-07-21 15:59:43,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:59:43,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:43,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:59:43,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:59:43,038 INFO L87 Difference]: Start difference. First operand 186 states and 342 transitions. Second operand 17 states. [2020-07-21 15:59:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:43,589 INFO L93 Difference]: Finished difference Result 376 states and 717 transitions. [2020-07-21 15:59:43,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:59:43,590 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 161 [2020-07-21 15:59:43,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:43,594 INFO L225 Difference]: With dead ends: 376 [2020-07-21 15:59:43,594 INFO L226 Difference]: Without dead ends: 192 [2020-07-21 15:59:43,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 295 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:59:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-21 15:59:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-07-21 15:59:43,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-21 15:59:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 336 transitions. [2020-07-21 15:59:43,619 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 336 transitions. Word has length 161 [2020-07-21 15:59:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:43,620 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 336 transitions. [2020-07-21 15:59:43,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:59:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 336 transitions. [2020-07-21 15:59:43,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-07-21 15:59:43,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:43,626 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:43,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:43,839 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1791351881, now seen corresponding path program 6 times [2020-07-21 15:59:43,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:43,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21284532] [2020-07-21 15:59:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:44,007 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:44,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:44,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:59:44,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 150 proven. 236 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 15:59:44,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:45,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:45,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:45,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:45,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:46,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:46,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:46,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:46,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:46,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 150 proven. 246 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-07-21 15:59:46,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21284532] [2020-07-21 15:59:46,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:46,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 25 [2020-07-21 15:59:46,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891468868] [2020-07-21 15:59:46,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 15:59:46,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:46,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 15:59:46,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-07-21 15:59:46,289 INFO L87 Difference]: Start difference. First operand 190 states and 336 transitions. Second operand 25 states. [2020-07-21 15:59:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:47,725 INFO L93 Difference]: Finished difference Result 462 states and 962 transitions. [2020-07-21 15:59:47,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 15:59:47,733 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2020-07-21 15:59:47,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:47,740 INFO L225 Difference]: With dead ends: 462 [2020-07-21 15:59:47,740 INFO L226 Difference]: Without dead ends: 276 [2020-07-21 15:59:47,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 310 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2020-07-21 15:59:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-07-21 15:59:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 248. [2020-07-21 15:59:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-07-21 15:59:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 470 transitions. [2020-07-21 15:59:47,779 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 470 transitions. Word has length 174 [2020-07-21 15:59:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:47,780 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 470 transitions. [2020-07-21 15:59:47,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 15:59:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 470 transitions. [2020-07-21 15:59:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-21 15:59:47,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:47,785 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:48,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:48,001 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:48,002 INFO L82 PathProgramCache]: Analyzing trace with hash 594466134, now seen corresponding path program 7 times [2020-07-21 15:59:48,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:48,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708253824] [2020-07-21 15:59:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:48,162 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:48,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:59:48,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 73 proven. 91 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-21 15:59:48,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:48,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:49,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:49,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:49,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:49,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 73 proven. 97 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-07-21 15:59:49,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708253824] [2020-07-21 15:59:49,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:49,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 21 [2020-07-21 15:59:49,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94120228] [2020-07-21 15:59:49,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:59:49,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:49,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:59:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:59:49,794 INFO L87 Difference]: Start difference. First operand 248 states and 470 transitions. Second operand 21 states. [2020-07-21 15:59:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:50,818 INFO L93 Difference]: Finished difference Result 502 states and 1013 transitions. [2020-07-21 15:59:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 15:59:50,819 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 107 [2020-07-21 15:59:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:50,823 INFO L225 Difference]: With dead ends: 502 [2020-07-21 15:59:50,824 INFO L226 Difference]: Without dead ends: 258 [2020-07-21 15:59:50,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 185 SyntacticMatches, 15 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 15:59:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-21 15:59:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 231. [2020-07-21 15:59:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-21 15:59:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 407 transitions. [2020-07-21 15:59:50,854 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 407 transitions. Word has length 107 [2020-07-21 15:59:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:50,855 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 407 transitions. [2020-07-21 15:59:50,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:59:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 407 transitions. [2020-07-21 15:59:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 15:59:50,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:50,860 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:51,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:51,075 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:51,076 INFO L82 PathProgramCache]: Analyzing trace with hash -77183713, now seen corresponding path program 8 times [2020-07-21 15:59:51,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:51,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294581984] [2020-07-21 15:59:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:51,271 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:51,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:51,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:59:51,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2020-07-21 15:59:51,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:52,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:52,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:52,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:52,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:52,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:52,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:52,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:52,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 21 proven. 136 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-21 15:59:52,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294581984] [2020-07-21 15:59:52,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:52,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 15:59:52,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087826726] [2020-07-21 15:59:52,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 15:59:52,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:52,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 15:59:52,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:59:52,889 INFO L87 Difference]: Start difference. First operand 231 states and 407 transitions. Second operand 16 states. [2020-07-21 15:59:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:53,210 INFO L93 Difference]: Finished difference Result 240 states and 425 transitions. [2020-07-21 15:59:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:59:53,215 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 121 [2020-07-21 15:59:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:53,220 INFO L225 Difference]: With dead ends: 240 [2020-07-21 15:59:53,220 INFO L226 Difference]: Without dead ends: 236 [2020-07-21 15:59:53,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 218 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:59:53,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-21 15:59:53,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2020-07-21 15:59:53,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 15:59:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 414 transitions. [2020-07-21 15:59:53,247 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 414 transitions. Word has length 121 [2020-07-21 15:59:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:53,248 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 414 transitions. [2020-07-21 15:59:53,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 15:59:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 414 transitions. [2020-07-21 15:59:53,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-21 15:59:53,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:53,254 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:53,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:53,468 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1996526584, now seen corresponding path program 3 times [2020-07-21 15:59:53,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:53,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505969185] [2020-07-21 15:59:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:53,618 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:53,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:53,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:59:53,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 48 proven. 105 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-21 15:59:53,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:54,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:54,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:54,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:54,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:54,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:54,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:54,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 48 proven. 110 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-07-21 15:59:54,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505969185] [2020-07-21 15:59:54,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:54,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 15:59:54,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571623682] [2020-07-21 15:59:54,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:59:54,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:54,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:59:54,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:59:54,444 INFO L87 Difference]: Start difference. First operand 233 states and 414 transitions. Second operand 14 states. [2020-07-21 15:59:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:54,658 INFO L93 Difference]: Finished difference Result 292 states and 577 transitions. [2020-07-21 15:59:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:59:54,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2020-07-21 15:59:54,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:54,665 INFO L225 Difference]: With dead ends: 292 [2020-07-21 15:59:54,665 INFO L226 Difference]: Without dead ends: 288 [2020-07-21 15:59:54,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 246 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:59:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-07-21 15:59:54,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 244. [2020-07-21 15:59:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-21 15:59:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 435 transitions. [2020-07-21 15:59:54,693 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 435 transitions. Word has length 133 [2020-07-21 15:59:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:54,693 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 435 transitions. [2020-07-21 15:59:54,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:59:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 435 transitions. [2020-07-21 15:59:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-21 15:59:54,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:54,699 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:54,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:54,914 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:54,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:54,914 INFO L82 PathProgramCache]: Analyzing trace with hash -71686390, now seen corresponding path program 9 times [2020-07-21 15:59:54,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:54,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108158700] [2020-07-21 15:59:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:55,050 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:55,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:55,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:59:55,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 76 proven. 73 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2020-07-21 15:59:55,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:55,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:55,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:55,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:55,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:55,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:55,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 76 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-07-21 15:59:55,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108158700] [2020-07-21 15:59:55,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:55,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 15:59:55,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667968154] [2020-07-21 15:59:55,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:59:55,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:55,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:59:55,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:59:55,893 INFO L87 Difference]: Start difference. First operand 244 states and 435 transitions. Second operand 14 states. [2020-07-21 15:59:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:56,086 INFO L93 Difference]: Finished difference Result 272 states and 510 transitions. [2020-07-21 15:59:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:59:56,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2020-07-21 15:59:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:56,090 INFO L225 Difference]: With dead ends: 272 [2020-07-21 15:59:56,090 INFO L226 Difference]: Without dead ends: 268 [2020-07-21 15:59:56,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 245 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:59:56,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-07-21 15:59:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 244. [2020-07-21 15:59:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-21 15:59:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 435 transitions. [2020-07-21 15:59:56,111 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 435 transitions. Word has length 133 [2020-07-21 15:59:56,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:56,112 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 435 transitions. [2020-07-21 15:59:56,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:59:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 435 transitions. [2020-07-21 15:59:56,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-21 15:59:56,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:56,117 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:56,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:56,331 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:56,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:56,331 INFO L82 PathProgramCache]: Analyzing trace with hash -146170438, now seen corresponding path program 4 times [2020-07-21 15:59:56,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:56,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035080237] [2020-07-21 15:59:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:56,468 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:56,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:56,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:59:56,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 139 proven. 46 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2020-07-21 15:59:56,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:56,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:57,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:57,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:57,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 141 proven. 49 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2020-07-21 15:59:57,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035080237] [2020-07-21 15:59:57,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:57,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 15:59:57,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701289859] [2020-07-21 15:59:57,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:59:57,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:57,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:59:57,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:59:57,333 INFO L87 Difference]: Start difference. First operand 244 states and 435 transitions. Second operand 14 states. [2020-07-21 15:59:57,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:57,583 INFO L93 Difference]: Finished difference Result 254 states and 453 transitions. [2020-07-21 15:59:57,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:59:57,584 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 157 [2020-07-21 15:59:57,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:57,588 INFO L225 Difference]: With dead ends: 254 [2020-07-21 15:59:57,589 INFO L226 Difference]: Without dead ends: 250 [2020-07-21 15:59:57,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 295 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:59:57,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-21 15:59:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 244. [2020-07-21 15:59:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-21 15:59:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 435 transitions. [2020-07-21 15:59:57,616 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 435 transitions. Word has length 157 [2020-07-21 15:59:57,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:57,617 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 435 transitions. [2020-07-21 15:59:57,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:59:57,618 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 435 transitions. [2020-07-21 15:59:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-07-21 15:59:57,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:57,622 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:57,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:57,836 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:57,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1066126256, now seen corresponding path program 10 times [2020-07-21 15:59:57,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:57,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597502978] [2020-07-21 15:59:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:57,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:59:57,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:57,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:59:58,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:59:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 369 proven. 86 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-21 15:59:58,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:59:58,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:58,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:58,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:59,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:59,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:59,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:59,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 98 proven. 199 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-21 15:59:59,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597502978] [2020-07-21 15:59:59,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:59,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 19 [2020-07-21 15:59:59,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753768993] [2020-07-21 15:59:59,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 15:59:59,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:59,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 15:59:59,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:59:59,562 INFO L87 Difference]: Start difference. First operand 244 states and 435 transitions. Second operand 19 states. [2020-07-21 16:00:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:00,232 INFO L93 Difference]: Finished difference Result 515 states and 1018 transitions. [2020-07-21 16:00:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 16:00:00,233 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 159 [2020-07-21 16:00:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:00,238 INFO L225 Difference]: With dead ends: 515 [2020-07-21 16:00:00,238 INFO L226 Difference]: Without dead ends: 273 [2020-07-21 16:00:00,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 287 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2020-07-21 16:00:00,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-07-21 16:00:00,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 236. [2020-07-21 16:00:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 16:00:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 416 transitions. [2020-07-21 16:00:00,266 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 416 transitions. Word has length 159 [2020-07-21 16:00:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:00,266 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 416 transitions. [2020-07-21 16:00:00,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 16:00:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 416 transitions. [2020-07-21 16:00:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-07-21 16:00:00,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:00,270 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:00,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:00,485 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:00,486 INFO L82 PathProgramCache]: Analyzing trace with hash -754125023, now seen corresponding path program 3 times [2020-07-21 16:00:00,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:00,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218930297] [2020-07-21 16:00:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:00,649 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:00,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:00:00,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 45 proven. 235 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2020-07-21 16:00:00,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:01,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:02,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:02,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:02,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:02,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:02,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 45 proven. 249 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2020-07-21 16:00:02,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218930297] [2020-07-21 16:00:02,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:02,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:00:02,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929989027] [2020-07-21 16:00:02,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:00:02,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:02,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:00:02,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:00:02,457 INFO L87 Difference]: Start difference. First operand 236 states and 416 transitions. Second operand 18 states. [2020-07-21 16:00:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:02,751 INFO L93 Difference]: Finished difference Result 256 states and 458 transitions. [2020-07-21 16:00:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:00:02,752 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 169 [2020-07-21 16:00:02,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:02,755 INFO L225 Difference]: With dead ends: 256 [2020-07-21 16:00:02,756 INFO L226 Difference]: Without dead ends: 252 [2020-07-21 16:00:02,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 311 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 16:00:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-21 16:00:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 231. [2020-07-21 16:00:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-21 16:00:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 405 transitions. [2020-07-21 16:00:02,779 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 405 transitions. Word has length 169 [2020-07-21 16:00:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:02,779 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 405 transitions. [2020-07-21 16:00:02,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:00:02,779 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 405 transitions. [2020-07-21 16:00:02,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-07-21 16:00:02,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:02,783 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 9, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:02,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:02,999 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:02,999 INFO L82 PathProgramCache]: Analyzing trace with hash 990260059, now seen corresponding path program 11 times [2020-07-21 16:00:03,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:03,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517468388] [2020-07-21 16:00:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:03,214 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:00:03,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:03,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:00:03,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 173 proven. 246 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2020-07-21 16:00:03,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:04,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:04,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:04,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:04,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:04,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:04,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:05,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:05,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:05,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:05,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:05,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:05,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:05,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 173 proven. 260 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2020-07-21 16:00:05,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517468388] [2020-07-21 16:00:05,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:05,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-21 16:00:05,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161222114] [2020-07-21 16:00:05,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 16:00:05,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:05,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 16:00:05,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-07-21 16:00:05,752 INFO L87 Difference]: Start difference. First operand 231 states and 405 transitions. Second operand 25 states. [2020-07-21 16:00:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:06,701 INFO L93 Difference]: Finished difference Result 482 states and 922 transitions. [2020-07-21 16:00:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 16:00:06,702 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2020-07-21 16:00:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:06,706 INFO L225 Difference]: With dead ends: 482 [2020-07-21 16:00:06,706 INFO L226 Difference]: Without dead ends: 255 [2020-07-21 16:00:06,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 305 SyntacticMatches, 19 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 16:00:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-21 16:00:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 233. [2020-07-21 16:00:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 16:00:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 378 transitions. [2020-07-21 16:00:06,731 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 378 transitions. Word has length 174 [2020-07-21 16:00:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:06,732 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 378 transitions. [2020-07-21 16:00:06,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 16:00:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 378 transitions. [2020-07-21 16:00:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-07-21 16:00:06,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:06,736 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:06,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:06,952 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:06,952 INFO L82 PathProgramCache]: Analyzing trace with hash 195314039, now seen corresponding path program 12 times [2020-07-21 16:00:06,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:06,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201462663] [2020-07-21 16:00:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:07,205 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:00:07,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:07,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:00:07,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 712 proven. 211 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2020-07-21 16:00:07,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:08,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:08,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:08,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:08,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:08,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:09,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:09,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:09,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:09,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:09,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 169 proven. 395 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-21 16:00:09,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201462663] [2020-07-21 16:00:09,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:09,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 21 [2020-07-21 16:00:09,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570322309] [2020-07-21 16:00:09,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 16:00:09,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:09,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 16:00:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:00:09,620 INFO L87 Difference]: Start difference. First operand 233 states and 378 transitions. Second operand 21 states. [2020-07-21 16:00:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:10,667 INFO L93 Difference]: Finished difference Result 540 states and 940 transitions. [2020-07-21 16:00:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 16:00:10,668 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 228 [2020-07-21 16:00:10,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:10,671 INFO L225 Difference]: With dead ends: 540 [2020-07-21 16:00:10,671 INFO L226 Difference]: Without dead ends: 261 [2020-07-21 16:00:10,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 421 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 16:00:10,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-21 16:00:10,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 221. [2020-07-21 16:00:10,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 16:00:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 349 transitions. [2020-07-21 16:00:10,690 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 349 transitions. Word has length 228 [2020-07-21 16:00:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:10,691 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 349 transitions. [2020-07-21 16:00:10,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 16:00:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 349 transitions. [2020-07-21 16:00:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 16:00:10,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:10,694 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:10,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:10,909 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:10,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:10,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1915119264, now seen corresponding path program 13 times [2020-07-21 16:00:10,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:10,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120988898] [2020-07-21 16:00:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:11,128 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:11,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:11,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:00:11,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 52 proven. 283 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2020-07-21 16:00:11,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:12,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:12,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:12,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:12,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:12,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:12,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:12,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:12,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:12,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 52 proven. 299 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2020-07-21 16:00:13,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120988898] [2020-07-21 16:00:13,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:13,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:00:13,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393315611] [2020-07-21 16:00:13,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:00:13,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:13,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:00:13,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:00:13,030 INFO L87 Difference]: Start difference. First operand 221 states and 349 transitions. Second operand 18 states. [2020-07-21 16:00:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:13,340 INFO L93 Difference]: Finished difference Result 236 states and 369 transitions. [2020-07-21 16:00:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:00:13,341 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 189 [2020-07-21 16:00:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:13,344 INFO L225 Difference]: With dead ends: 236 [2020-07-21 16:00:13,344 INFO L226 Difference]: Without dead ends: 232 [2020-07-21 16:00:13,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 349 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 16:00:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-21 16:00:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 226. [2020-07-21 16:00:13,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-07-21 16:00:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 357 transitions. [2020-07-21 16:00:13,363 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 357 transitions. Word has length 189 [2020-07-21 16:00:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:13,364 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 357 transitions. [2020-07-21 16:00:13,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:00:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 357 transitions. [2020-07-21 16:00:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 16:00:13,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:13,367 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:13,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:13,581 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1803358882, now seen corresponding path program 14 times [2020-07-21 16:00:13,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:13,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099520787] [2020-07-21 16:00:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:00:13,825 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:13,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:13,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:00:13,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 79 proven. 212 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-07-21 16:00:13,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:14,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:14,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:14,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:15,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:15,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:15,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:15,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 79 proven. 222 refuted. 0 times theorem prover too weak. 617 trivial. 0 not checked. [2020-07-21 16:00:15,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099520787] [2020-07-21 16:00:15,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:15,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:00:15,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265648557] [2020-07-21 16:00:15,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:00:15,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:15,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:00:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:00:15,266 INFO L87 Difference]: Start difference. First operand 226 states and 357 transitions. Second operand 16 states. [2020-07-21 16:00:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:15,567 INFO L93 Difference]: Finished difference Result 268 states and 442 transitions. [2020-07-21 16:00:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:00:15,568 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 189 [2020-07-21 16:00:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:15,572 INFO L225 Difference]: With dead ends: 268 [2020-07-21 16:00:15,572 INFO L226 Difference]: Without dead ends: 264 [2020-07-21 16:00:15,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 353 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:00:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-21 16:00:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 236. [2020-07-21 16:00:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 16:00:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 384 transitions. [2020-07-21 16:00:15,595 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 384 transitions. Word has length 189 [2020-07-21 16:00:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:15,595 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 384 transitions. [2020-07-21 16:00:15,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:00:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 384 transitions. [2020-07-21 16:00:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 16:00:15,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:15,600 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:15,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:15,815 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:15,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:15,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1711365749, now seen corresponding path program 15 times [2020-07-21 16:00:15,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:15,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768282119] [2020-07-21 16:00:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:16,039 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:16,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:16,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:00:16,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 111 proven. 200 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-07-21 16:00:16,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:16,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:17,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:17,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:17,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:17,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:17,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 111 proven. 210 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2020-07-21 16:00:17,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768282119] [2020-07-21 16:00:17,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:17,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:00:17,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611813060] [2020-07-21 16:00:17,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:00:17,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:17,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:00:17,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:00:17,497 INFO L87 Difference]: Start difference. First operand 236 states and 384 transitions. Second operand 16 states. [2020-07-21 16:00:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:17,766 INFO L93 Difference]: Finished difference Result 296 states and 548 transitions. [2020-07-21 16:00:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:00:17,767 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 201 [2020-07-21 16:00:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:17,771 INFO L225 Difference]: With dead ends: 296 [2020-07-21 16:00:17,772 INFO L226 Difference]: Without dead ends: 292 [2020-07-21 16:00:17,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 377 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:00:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-21 16:00:17,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 236. [2020-07-21 16:00:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 16:00:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 384 transitions. [2020-07-21 16:00:17,799 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 384 transitions. Word has length 201 [2020-07-21 16:00:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:17,800 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 384 transitions. [2020-07-21 16:00:17,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:00:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 384 transitions. [2020-07-21 16:00:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-07-21 16:00:17,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:17,803 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 11, 11, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:18,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:18,017 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1338682891, now seen corresponding path program 16 times [2020-07-21 16:00:18,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:18,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474217774] [2020-07-21 16:00:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:18,229 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:00:18,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:18,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:00:18,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 792 proven. 124 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2020-07-21 16:00:18,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:19,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:19,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:19,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:19,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:20,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:20,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:20,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:20,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:20,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 167 proven. 416 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2020-07-21 16:00:20,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474217774] [2020-07-21 16:00:20,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:20,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 21 [2020-07-21 16:00:20,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109158306] [2020-07-21 16:00:20,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 16:00:20,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:20,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 16:00:20,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:00:20,635 INFO L87 Difference]: Start difference. First operand 236 states and 384 transitions. Second operand 21 states. [2020-07-21 16:00:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:21,471 INFO L93 Difference]: Finished difference Result 490 states and 832 transitions. [2020-07-21 16:00:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 16:00:21,472 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 227 [2020-07-21 16:00:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:21,478 INFO L225 Difference]: With dead ends: 490 [2020-07-21 16:00:21,478 INFO L226 Difference]: Without dead ends: 245 [2020-07-21 16:00:21,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 419 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 16:00:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-21 16:00:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 207. [2020-07-21 16:00:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-21 16:00:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 326 transitions. [2020-07-21 16:00:21,499 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 326 transitions. Word has length 227 [2020-07-21 16:00:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:21,499 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 326 transitions. [2020-07-21 16:00:21,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 16:00:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 326 transitions. [2020-07-21 16:00:21,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-07-21 16:00:21,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:21,503 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 12, 11, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:21,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:21,717 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:21,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:21,718 INFO L82 PathProgramCache]: Analyzing trace with hash -433315437, now seen corresponding path program 17 times [2020-07-21 16:00:21,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:21,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813443074] [2020-07-21 16:00:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:00:21,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:00:21,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:21,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:00:21,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 944 proven. 251 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2020-07-21 16:00:22,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:23,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:23,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:24,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:24,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:24,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:24,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:25,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:25,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:25,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:25,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 229 proven. 534 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2020-07-21 16:00:25,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813443074] [2020-07-21 16:00:25,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:25,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-21 16:00:25,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543472729] [2020-07-21 16:00:25,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 16:00:25,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:25,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 16:00:25,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-21 16:00:25,385 INFO L87 Difference]: Start difference. First operand 207 states and 326 transitions. Second operand 25 states. [2020-07-21 16:00:26,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:26,633 INFO L93 Difference]: Finished difference Result 438 states and 751 transitions. [2020-07-21 16:00:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 16:00:26,634 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 252 [2020-07-21 16:00:26,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:26,637 INFO L225 Difference]: With dead ends: 438 [2020-07-21 16:00:26,637 INFO L226 Difference]: Without dead ends: 236 [2020-07-21 16:00:26,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 461 SyntacticMatches, 19 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2020-07-21 16:00:26,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-21 16:00:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 212. [2020-07-21 16:00:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-21 16:00:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 331 transitions. [2020-07-21 16:00:26,660 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 331 transitions. Word has length 252 [2020-07-21 16:00:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:26,660 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 331 transitions. [2020-07-21 16:00:26,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 16:00:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 331 transitions. [2020-07-21 16:00:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-07-21 16:00:26,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:26,664 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 15, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:26,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:26,877 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:26,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:26,877 INFO L82 PathProgramCache]: Analyzing trace with hash 638865236, now seen corresponding path program 5 times [2020-07-21 16:00:26,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:26,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092097039] [2020-07-21 16:00:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:27,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:27,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:27,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 16:00:27,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1534 backedges. 161 proven. 152 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2020-07-21 16:00:27,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:27,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:28,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:28,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:28,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:28,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:28,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1534 backedges. 161 proven. 157 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2020-07-21 16:00:28,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092097039] [2020-07-21 16:00:28,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:28,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 16:00:28,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122195431] [2020-07-21 16:00:28,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 16:00:28,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:28,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 16:00:28,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:00:28,508 INFO L87 Difference]: Start difference. First operand 212 states and 331 transitions. Second operand 14 states. [2020-07-21 16:00:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:28,729 INFO L93 Difference]: Finished difference Result 257 states and 441 transitions. [2020-07-21 16:00:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:00:28,731 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 237 [2020-07-21 16:00:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:28,734 INFO L225 Difference]: With dead ends: 257 [2020-07-21 16:00:28,735 INFO L226 Difference]: Without dead ends: 253 [2020-07-21 16:00:28,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 454 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:00:28,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-07-21 16:00:28,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 218. [2020-07-21 16:00:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-21 16:00:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 351 transitions. [2020-07-21 16:00:28,750 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 351 transitions. Word has length 237 [2020-07-21 16:00:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:28,751 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 351 transitions. [2020-07-21 16:00:28,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 16:00:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 351 transitions. [2020-07-21 16:00:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-07-21 16:00:28,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:28,754 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 16, 16, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:28,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:28,969 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:28,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:28,970 INFO L82 PathProgramCache]: Analyzing trace with hash 89106772, now seen corresponding path program 18 times [2020-07-21 16:00:28,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:28,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838113184] [2020-07-21 16:00:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:29,250 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:29,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:29,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:00:29,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 185 proven. 198 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2020-07-21 16:00:29,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:30,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 187 proven. 206 refuted. 0 times theorem prover too weak. 1117 trivial. 0 not checked. [2020-07-21 16:00:30,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838113184] [2020-07-21 16:00:30,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:30,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:00:30,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524651895] [2020-07-21 16:00:30,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:00:30,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:30,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:00:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:00:30,980 INFO L87 Difference]: Start difference. First operand 218 states and 351 transitions. Second operand 16 states. [2020-07-21 16:00:31,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:31,255 INFO L93 Difference]: Finished difference Result 228 states and 365 transitions. [2020-07-21 16:00:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:00:31,257 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 237 [2020-07-21 16:00:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:31,260 INFO L225 Difference]: With dead ends: 228 [2020-07-21 16:00:31,260 INFO L226 Difference]: Without dead ends: 224 [2020-07-21 16:00:31,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 449 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:00:31,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-21 16:00:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 210. [2020-07-21 16:00:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-07-21 16:00:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 331 transitions. [2020-07-21 16:00:31,276 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 331 transitions. Word has length 237 [2020-07-21 16:00:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:31,277 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 331 transitions. [2020-07-21 16:00:31,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:00:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 331 transitions. [2020-07-21 16:00:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-07-21 16:00:31,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:31,280 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 13, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:31,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:31,495 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:31,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1401493989, now seen corresponding path program 19 times [2020-07-21 16:00:31,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:31,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210398788] [2020-07-21 16:00:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:31,783 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:00:31,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:31,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 16:00:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 376 proven. 674 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2020-07-21 16:00:32,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:33,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:33,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:33,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:34,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:34,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:35,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:35,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:35,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:35,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:36,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:36,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 376 proven. 698 refuted. 0 times theorem prover too weak. 1446 trivial. 0 not checked. [2020-07-21 16:00:36,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210398788] [2020-07-21 16:00:36,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:36,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-21 16:00:36,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814084001] [2020-07-21 16:00:36,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 16:00:36,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:36,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 16:00:36,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2020-07-21 16:00:36,304 INFO L87 Difference]: Start difference. First operand 210 states and 331 transitions. Second operand 29 states. [2020-07-21 16:00:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:37,858 INFO L93 Difference]: Finished difference Result 477 states and 840 transitions. [2020-07-21 16:00:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 16:00:37,859 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 302 [2020-07-21 16:00:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:37,863 INFO L225 Difference]: With dead ends: 477 [2020-07-21 16:00:37,863 INFO L226 Difference]: Without dead ends: 272 [2020-07-21 16:00:37,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 554 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=443, Invalid=2313, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 16:00:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-21 16:00:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 222. [2020-07-21 16:00:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-21 16:00:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 347 transitions. [2020-07-21 16:00:37,883 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 347 transitions. Word has length 302 [2020-07-21 16:00:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:37,884 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 347 transitions. [2020-07-21 16:00:37,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 16:00:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 347 transitions. [2020-07-21 16:00:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-07-21 16:00:37,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:37,887 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:38,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:38,101 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:38,102 INFO L82 PathProgramCache]: Analyzing trace with hash 120952594, now seen corresponding path program 20 times [2020-07-21 16:00:38,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:38,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431775941] [2020-07-21 16:00:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:00:38,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:38,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:38,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:00:38,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 301 proven. 76 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2020-07-21 16:00:38,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:39,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:39,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:39,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:39,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:39,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:39,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:39,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 303 proven. 84 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2020-07-21 16:00:39,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431775941] [2020-07-21 16:00:39,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:39,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:00:39,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790791558] [2020-07-21 16:00:39,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:00:39,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:39,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:00:39,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:00:39,897 INFO L87 Difference]: Start difference. First operand 222 states and 347 transitions. Second operand 16 states. [2020-07-21 16:00:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:40,131 INFO L93 Difference]: Finished difference Result 234 states and 366 transitions. [2020-07-21 16:00:40,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:00:40,133 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 237 [2020-07-21 16:00:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:40,136 INFO L225 Difference]: With dead ends: 234 [2020-07-21 16:00:40,136 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 16:00:40,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 450 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 16:00:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 16:00:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 222. [2020-07-21 16:00:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-21 16:00:40,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 347 transitions. [2020-07-21 16:00:40,151 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 347 transitions. Word has length 237 [2020-07-21 16:00:40,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:40,151 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 347 transitions. [2020-07-21 16:00:40,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:00:40,151 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 347 transitions. [2020-07-21 16:00:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-07-21 16:00:40,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:40,154 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:40,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:40,371 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:40,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:40,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1057498309, now seen corresponding path program 6 times [2020-07-21 16:00:40,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:40,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427521918] [2020-07-21 16:00:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:40,705 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:40,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:40,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:00:40,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 86 proven. 445 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-07-21 16:00:40,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:42,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:42,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:43,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:43,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:43,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:43,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:44,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:44,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 86 proven. 466 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2020-07-21 16:00:44,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427521918] [2020-07-21 16:00:44,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:44,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:00:44,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215891652] [2020-07-21 16:00:44,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:00:44,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:44,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:00:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:00:44,140 INFO L87 Difference]: Start difference. First operand 222 states and 347 transitions. Second operand 20 states. [2020-07-21 16:00:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:44,560 INFO L93 Difference]: Finished difference Result 232 states and 361 transitions. [2020-07-21 16:00:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:00:44,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 249 [2020-07-21 16:00:44,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:44,565 INFO L225 Difference]: With dead ends: 232 [2020-07-21 16:00:44,565 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 16:00:44,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 466 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:00:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 16:00:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 200. [2020-07-21 16:00:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-21 16:00:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 305 transitions. [2020-07-21 16:00:44,580 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 305 transitions. Word has length 249 [2020-07-21 16:00:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:44,581 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 305 transitions. [2020-07-21 16:00:44,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:00:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 305 transitions. [2020-07-21 16:00:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-07-21 16:00:44,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:44,585 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 22, 21, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:44,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:44,799 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:44,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1256130898, now seen corresponding path program 21 times [2020-07-21 16:00:44,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:44,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149317533] [2020-07-21 16:00:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:45,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:00:45,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:45,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:00:45,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 2835 proven. 207 refuted. 0 times theorem prover too weak. 2143 trivial. 0 not checked. [2020-07-21 16:00:45,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:47,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:48,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:48,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:48,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:48,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:49,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:49,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:49,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 331 proven. 998 refuted. 0 times theorem prover too weak. 3856 trivial. 0 not checked. [2020-07-21 16:00:49,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149317533] [2020-07-21 16:00:49,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:49,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-21 16:00:49,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666665116] [2020-07-21 16:00:49,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 16:00:49,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:49,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 16:00:49,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:00:49,290 INFO L87 Difference]: Start difference. First operand 200 states and 305 transitions. Second operand 23 states. [2020-07-21 16:00:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:50,327 INFO L93 Difference]: Finished difference Result 404 states and 640 transitions. [2020-07-21 16:00:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 16:00:50,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 428 [2020-07-21 16:00:50,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:50,331 INFO L225 Difference]: With dead ends: 404 [2020-07-21 16:00:50,331 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 16:00:50,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 817 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 16:00:50,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 16:00:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 177. [2020-07-21 16:00:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-21 16:00:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 262 transitions. [2020-07-21 16:00:50,344 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 262 transitions. Word has length 428 [2020-07-21 16:00:50,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:50,345 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 262 transitions. [2020-07-21 16:00:50,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 16:00:50,345 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 262 transitions. [2020-07-21 16:00:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-21 16:00:50,349 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:50,350 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 29, 29, 26, 25, 20, 20, 20, 20, 20, 20, 20, 14, 14, 14, 14, 14, 14, 14, 14, 12, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:50,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:50,563 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash -225812857, now seen corresponding path program 22 times [2020-07-21 16:00:50,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:50,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802976500] [2020-07-21 16:00:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:50,954 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:00:50,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:50,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:00:50,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 3540 proven. 415 refuted. 0 times theorem prover too weak. 2538 trivial. 0 not checked. [2020-07-21 16:00:51,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:54,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:54,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:54,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:54,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:54,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:55,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:55,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:55,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:55,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:55,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:55,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:55,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:55,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 330 proven. 1329 refuted. 0 times theorem prover too weak. 4834 trivial. 0 not checked. [2020-07-21 16:00:55,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802976500] [2020-07-21 16:00:55,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:00:55,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-21 16:00:55,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180303904] [2020-07-21 16:00:55,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 16:00:55,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:00:55,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 16:00:55,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-21 16:00:55,766 INFO L87 Difference]: Start difference. First operand 177 states and 262 transitions. Second operand 25 states. [2020-07-21 16:00:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:00:56,984 INFO L93 Difference]: Finished difference Result 445 states and 720 transitions. [2020-07-21 16:00:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 16:00:56,985 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 472 [2020-07-21 16:00:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:00:56,987 INFO L225 Difference]: With dead ends: 445 [2020-07-21 16:00:56,987 INFO L226 Difference]: Without dead ends: 243 [2020-07-21 16:00:56,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 901 SyntacticMatches, 19 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2020-07-21 16:00:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-21 16:00:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 198. [2020-07-21 16:00:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 16:00:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 292 transitions. [2020-07-21 16:00:57,000 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 292 transitions. Word has length 472 [2020-07-21 16:00:57,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:00:57,000 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 292 transitions. [2020-07-21 16:00:57,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 16:00:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 292 transitions. [2020-07-21 16:00:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-07-21 16:00:57,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:00:57,003 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 21, 17, 16, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 10, 8, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:00:57,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:57,218 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:00:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:00:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash -15078143, now seen corresponding path program 23 times [2020-07-21 16:00:57,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:00:57,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386943854] [2020-07-21 16:00:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:00:57,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:00:57,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:00:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:00:57,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 134 proven. 494 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2020-07-21 16:00:57,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:59,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:59,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:59,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:59,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:59,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:59,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:00,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:00,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:00,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 134 proven. 510 refuted. 0 times theorem prover too weak. 2000 trivial. 0 not checked. [2020-07-21 16:01:00,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386943854] [2020-07-21 16:01:00,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:00,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:01:00,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058490414] [2020-07-21 16:01:00,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:01:00,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:00,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:01:00,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:01:00,304 INFO L87 Difference]: Start difference. First operand 198 states and 292 transitions. Second operand 18 states. [2020-07-21 16:01:00,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:00,738 INFO L93 Difference]: Finished difference Result 247 states and 398 transitions. [2020-07-21 16:01:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:01:00,739 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 310 [2020-07-21 16:01:00,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:00,743 INFO L225 Difference]: With dead ends: 247 [2020-07-21 16:01:00,743 INFO L226 Difference]: Without dead ends: 243 [2020-07-21 16:01:00,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 591 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:01:00,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-21 16:01:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2020-07-21 16:01:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-07-21 16:01:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 379 transitions. [2020-07-21 16:01:00,759 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 379 transitions. Word has length 310 [2020-07-21 16:01:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:00,760 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 379 transitions. [2020-07-21 16:01:00,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:01:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 379 transitions. [2020-07-21 16:01:00,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2020-07-21 16:01:00,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:00,765 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 23, 23, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:00,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:00,978 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:00,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:00,979 INFO L82 PathProgramCache]: Analyzing trace with hash -727432477, now seen corresponding path program 24 times [2020-07-21 16:01:00,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:00,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353177086] [2020-07-21 16:01:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:01,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:01,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:01,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:01:01,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5562 backedges. 3163 proven. 365 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-07-21 16:01:01,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:05,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:05,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:05,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:05,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:05,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:05,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:06,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:06,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:06,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:06,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:06,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:06,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5562 backedges. 472 proven. 1075 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2020-07-21 16:01:06,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353177086] [2020-07-21 16:01:06,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:06,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-21 16:01:06,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720956226] [2020-07-21 16:01:06,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 16:01:06,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:06,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 16:01:06,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-21 16:01:06,660 INFO L87 Difference]: Start difference. First operand 235 states and 379 transitions. Second operand 25 states. [2020-07-21 16:01:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:08,455 INFO L93 Difference]: Finished difference Result 623 states and 1115 transitions. [2020-07-21 16:01:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 16:01:08,456 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 443 [2020-07-21 16:01:08,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:08,461 INFO L225 Difference]: With dead ends: 623 [2020-07-21 16:01:08,461 INFO L226 Difference]: Without dead ends: 362 [2020-07-21 16:01:08,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 843 SyntacticMatches, 19 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=344, Invalid=1726, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 16:01:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-07-21 16:01:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 274. [2020-07-21 16:01:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-21 16:01:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 456 transitions. [2020-07-21 16:01:08,488 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 456 transitions. Word has length 443 [2020-07-21 16:01:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:08,488 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 456 transitions. [2020-07-21 16:01:08,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 16:01:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 456 transitions. [2020-07-21 16:01:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2020-07-21 16:01:08,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:08,496 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 34, 33, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 14, 12, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:08,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:08,708 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash 277252933, now seen corresponding path program 25 times [2020-07-21 16:01:08,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:08,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619800982] [2020-07-21 16:01:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:09,217 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:09,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:09,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 16:01:09,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11577 backedges. 6419 proven. 543 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2020-07-21 16:01:09,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:13,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:13,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:14,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:15,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:15,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:15,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:15,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:15,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:15,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11577 backedges. 677 proven. 1855 refuted. 0 times theorem prover too weak. 9045 trivial. 0 not checked. [2020-07-21 16:01:16,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619800982] [2020-07-21 16:01:16,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:16,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 29 [2020-07-21 16:01:16,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490097561] [2020-07-21 16:01:16,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 16:01:16,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:16,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 16:01:16,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2020-07-21 16:01:16,113 INFO L87 Difference]: Start difference. First operand 274 states and 456 transitions. Second operand 29 states. [2020-07-21 16:01:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:18,161 INFO L93 Difference]: Finished difference Result 670 states and 1207 transitions. [2020-07-21 16:01:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-21 16:01:18,162 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 632 [2020-07-21 16:01:18,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:18,168 INFO L225 Difference]: With dead ends: 670 [2020-07-21 16:01:18,169 INFO L226 Difference]: Without dead ends: 402 [2020-07-21 16:01:18,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1286 GetRequests, 1217 SyntacticMatches, 19 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=423, Invalid=2229, Unknown=0, NotChecked=0, Total=2652 [2020-07-21 16:01:18,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-07-21 16:01:18,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 328. [2020-07-21 16:01:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-07-21 16:01:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 572 transitions. [2020-07-21 16:01:18,199 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 572 transitions. Word has length 632 [2020-07-21 16:01:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:18,199 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 572 transitions. [2020-07-21 16:01:18,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 16:01:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 572 transitions. [2020-07-21 16:01:18,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2020-07-21 16:01:18,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:18,205 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 28, 28, 21, 20, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 12, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:18,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:18,421 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1242415305, now seen corresponding path program 26 times [2020-07-21 16:01:18,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:18,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446176856] [2020-07-21 16:01:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:18,916 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:18,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:18,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 16:01:18,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4868 backedges. 559 proven. 1020 refuted. 0 times theorem prover too weak. 3289 trivial. 0 not checked. [2020-07-21 16:01:19,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:21,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:21,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:21,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:21,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:22,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:22,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:22,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:23,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:23,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:23,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:23,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:24,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:24,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:24,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:24,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:24,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4868 backedges. 561 proven. 1044 refuted. 0 times theorem prover too weak. 3263 trivial. 0 not checked. [2020-07-21 16:01:24,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446176856] [2020-07-21 16:01:24,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:24,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-21 16:01:24,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550140653] [2020-07-21 16:01:24,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 16:01:24,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:24,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 16:01:24,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2020-07-21 16:01:24,474 INFO L87 Difference]: Start difference. First operand 328 states and 572 transitions. Second operand 29 states. [2020-07-21 16:01:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:26,773 INFO L93 Difference]: Finished difference Result 860 states and 1658 transitions. [2020-07-21 16:01:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 16:01:26,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 414 [2020-07-21 16:01:26,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:26,779 INFO L225 Difference]: With dead ends: 860 [2020-07-21 16:01:26,779 INFO L226 Difference]: Without dead ends: 397 [2020-07-21 16:01:26,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 777 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=443, Invalid=2313, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 16:01:26,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-07-21 16:01:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 354. [2020-07-21 16:01:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-07-21 16:01:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 641 transitions. [2020-07-21 16:01:26,814 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 641 transitions. Word has length 414 [2020-07-21 16:01:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:26,815 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 641 transitions. [2020-07-21 16:01:26,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 16:01:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 641 transitions. [2020-07-21 16:01:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 16:01:26,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:26,820 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 22, 22, 17, 16, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 10, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:27,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:27,034 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:27,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2143626465, now seen corresponding path program 27 times [2020-07-21 16:01:27,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:27,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962480846] [2020-07-21 16:01:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:27,517 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:27,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:27,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:01:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 238 proven. 438 refuted. 0 times theorem prover too weak. 2440 trivial. 0 not checked. [2020-07-21 16:01:27,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:29,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:29,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 240 proven. 452 refuted. 0 times theorem prover too weak. 2424 trivial. 0 not checked. [2020-07-21 16:01:30,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962480846] [2020-07-21 16:01:30,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:30,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:01:30,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732112774] [2020-07-21 16:01:30,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:01:30,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:01:30,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:01:30,887 INFO L87 Difference]: Start difference. First operand 354 states and 641 transitions. Second operand 18 states. [2020-07-21 16:01:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:31,314 INFO L93 Difference]: Finished difference Result 394 states and 757 transitions. [2020-07-21 16:01:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:01:31,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 334 [2020-07-21 16:01:31,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:31,321 INFO L225 Difference]: With dead ends: 394 [2020-07-21 16:01:31,321 INFO L226 Difference]: Without dead ends: 390 [2020-07-21 16:01:31,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 639 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:01:31,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-07-21 16:01:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 337. [2020-07-21 16:01:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-07-21 16:01:31,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 602 transitions. [2020-07-21 16:01:31,348 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 602 transitions. Word has length 334 [2020-07-21 16:01:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:31,349 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 602 transitions. [2020-07-21 16:01:31,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:01:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 602 transitions. [2020-07-21 16:01:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 16:01:31,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:31,354 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 22, 22, 17, 16, 14, 14, 14, 14, 14, 14, 14, 12, 11, 11, 11, 11, 11, 11, 11, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:31,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:31,568 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash -354834280, now seen corresponding path program 28 times [2020-07-21 16:01:31,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:31,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385489761] [2020-07-21 16:01:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:01:32,067 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:32,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:01:32,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 188 proven. 514 refuted. 0 times theorem prover too weak. 2686 trivial. 0 not checked. [2020-07-21 16:01:32,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:34,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 188 proven. 530 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2020-07-21 16:01:35,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385489761] [2020-07-21 16:01:35,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:35,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:01:35,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475683249] [2020-07-21 16:01:35,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:01:35,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:35,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:01:35,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:01:35,049 INFO L87 Difference]: Start difference. First operand 337 states and 602 transitions. Second operand 18 states. [2020-07-21 16:01:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:35,438 INFO L93 Difference]: Finished difference Result 392 states and 774 transitions. [2020-07-21 16:01:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:01:35,440 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 346 [2020-07-21 16:01:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:35,446 INFO L225 Difference]: With dead ends: 392 [2020-07-21 16:01:35,446 INFO L226 Difference]: Without dead ends: 388 [2020-07-21 16:01:35,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 663 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:01:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-07-21 16:01:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 327. [2020-07-21 16:01:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-07-21 16:01:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 578 transitions. [2020-07-21 16:01:35,470 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 578 transitions. Word has length 346 [2020-07-21 16:01:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:35,471 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 578 transitions. [2020-07-21 16:01:35,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:01:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 578 transitions. [2020-07-21 16:01:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 16:01:35,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:35,475 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 22, 22, 17, 16, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 10, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:35,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:35,676 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:35,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1226533921, now seen corresponding path program 29 times [2020-07-21 16:01:35,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:35,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407587913] [2020-07-21 16:01:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:36,226 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:36,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:01:36,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 229 proven. 351 refuted. 0 times theorem prover too weak. 2536 trivial. 0 not checked. [2020-07-21 16:01:36,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:37,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:37,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:38,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:38,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:38,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:38,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:38,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:38,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:38,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:38,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 229 proven. 361 refuted. 0 times theorem prover too weak. 2526 trivial. 0 not checked. [2020-07-21 16:01:38,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407587913] [2020-07-21 16:01:38,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:38,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:01:38,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639810698] [2020-07-21 16:01:38,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:01:38,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:38,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:01:38,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:01:38,928 INFO L87 Difference]: Start difference. First operand 327 states and 578 transitions. Second operand 16 states. [2020-07-21 16:01:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:39,310 INFO L93 Difference]: Finished difference Result 401 states and 822 transitions. [2020-07-21 16:01:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:01:39,312 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 334 [2020-07-21 16:01:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:39,318 INFO L225 Difference]: With dead ends: 401 [2020-07-21 16:01:39,318 INFO L226 Difference]: Without dead ends: 397 [2020-07-21 16:01:39,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 643 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:01:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-07-21 16:01:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 330. [2020-07-21 16:01:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-07-21 16:01:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 592 transitions. [2020-07-21 16:01:39,346 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 592 transitions. Word has length 334 [2020-07-21 16:01:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:39,346 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 592 transitions. [2020-07-21 16:01:39,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:01:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 592 transitions. [2020-07-21 16:01:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2020-07-21 16:01:39,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:39,354 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 50, 50, 28, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:39,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:39,569 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:39,569 INFO L82 PathProgramCache]: Analyzing trace with hash 684157566, now seen corresponding path program 4 times [2020-07-21 16:01:39,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:39,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868234355] [2020-07-21 16:01:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:01:40,234 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:40,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:40,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:01:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13537 backedges. 242 proven. 1714 refuted. 0 times theorem prover too weak. 11581 trivial. 0 not checked. [2020-07-21 16:01:40,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:45,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:45,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:46,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:46,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:47,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:47,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:47,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:47,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:48,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:48,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:48,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:48,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13537 backedges. 242 proven. 1744 refuted. 0 times theorem prover too weak. 11551 trivial. 0 not checked. [2020-07-21 16:01:48,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868234355] [2020-07-21 16:01:48,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:48,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 16:01:48,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075808911] [2020-07-21 16:01:48,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 16:01:48,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:48,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 16:01:48,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 16:01:48,834 INFO L87 Difference]: Start difference. First operand 330 states and 592 transitions. Second operand 22 states. [2020-07-21 16:01:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:49,531 INFO L93 Difference]: Finished difference Result 347 states and 643 transitions. [2020-07-21 16:01:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 16:01:49,533 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 676 [2020-07-21 16:01:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:49,539 INFO L225 Difference]: With dead ends: 347 [2020-07-21 16:01:49,540 INFO L226 Difference]: Without dead ends: 343 [2020-07-21 16:01:49,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1361 GetRequests, 1317 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 16:01:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-07-21 16:01:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 297. [2020-07-21 16:01:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-07-21 16:01:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 497 transitions. [2020-07-21 16:01:49,565 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 497 transitions. Word has length 676 [2020-07-21 16:01:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:49,566 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 497 transitions. [2020-07-21 16:01:49,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 16:01:49,567 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 497 transitions. [2020-07-21 16:01:49,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2020-07-21 16:01:49,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:49,573 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 37, 37, 27, 27, 21, 21, 21, 21, 21, 21, 21, 18, 18, 18, 18, 18, 18, 18, 15, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:49,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:49,787 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:49,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:49,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1485360514, now seen corresponding path program 30 times [2020-07-21 16:01:49,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:49,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091195189] [2020-07-21 16:01:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:50,379 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:50,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:50,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:01:50,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8262 backedges. 218 proven. 1321 refuted. 0 times theorem prover too weak. 6723 trivial. 0 not checked. [2020-07-21 16:01:50,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:54,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:55,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8262 backedges. 218 proven. 1354 refuted. 0 times theorem prover too weak. 6690 trivial. 0 not checked. [2020-07-21 16:01:57,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091195189] [2020-07-21 16:01:57,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:57,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 16:01:57,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077275027] [2020-07-21 16:01:57,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 16:01:57,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:57,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 16:01:57,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 16:01:57,190 INFO L87 Difference]: Start difference. First operand 297 states and 497 transitions. Second operand 22 states. [2020-07-21 16:01:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:57,706 INFO L93 Difference]: Finished difference Result 331 states and 589 transitions. [2020-07-21 16:01:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 16:01:57,708 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 535 [2020-07-21 16:01:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:57,712 INFO L225 Difference]: With dead ends: 331 [2020-07-21 16:01:57,713 INFO L226 Difference]: Without dead ends: 327 [2020-07-21 16:01:57,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1077 GetRequests, 1033 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 16:01:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-07-21 16:01:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 314. [2020-07-21 16:01:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-07-21 16:01:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 539 transitions. [2020-07-21 16:01:57,735 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 539 transitions. Word has length 535 [2020-07-21 16:01:57,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:57,740 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 539 transitions. [2020-07-21 16:01:57,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 16:01:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 539 transitions. [2020-07-21 16:01:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2020-07-21 16:01:57,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:57,747 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 41, 41, 27, 27, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 17, 14, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:57,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:57,961 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:57,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:57,961 INFO L82 PathProgramCache]: Analyzing trace with hash -410053731, now seen corresponding path program 31 times [2020-07-21 16:01:57,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:57,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034538561] [2020-07-21 16:01:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:58,597 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:58,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:58,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:01:58,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9450 backedges. 290 proven. 1155 refuted. 0 times theorem prover too weak. 8005 trivial. 0 not checked. [2020-07-21 16:01:58,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:02,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:03,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:03,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:04,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:04,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:04,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:04,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:05,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:05,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9450 backedges. 290 proven. 1179 refuted. 0 times theorem prover too weak. 7981 trivial. 0 not checked. [2020-07-21 16:02:05,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034538561] [2020-07-21 16:02:05,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:05,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:02:05,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812439681] [2020-07-21 16:02:05,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:02:05,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:05,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:02:05,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:02:05,337 INFO L87 Difference]: Start difference. First operand 314 states and 539 transitions. Second operand 20 states. [2020-07-21 16:02:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:05,910 INFO L93 Difference]: Finished difference Result 384 states and 764 transitions. [2020-07-21 16:02:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:02:05,912 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 571 [2020-07-21 16:02:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:05,918 INFO L225 Difference]: With dead ends: 384 [2020-07-21 16:02:05,919 INFO L226 Difference]: Without dead ends: 380 [2020-07-21 16:02:05,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1109 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:02:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-07-21 16:02:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 317. [2020-07-21 16:02:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-07-21 16:02:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 551 transitions. [2020-07-21 16:02:05,940 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 551 transitions. Word has length 571 [2020-07-21 16:02:05,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:05,942 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 551 transitions. [2020-07-21 16:02:05,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:02:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 551 transitions. [2020-07-21 16:02:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 16:02:05,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:05,950 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 21, 20, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 14, 12, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:06,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:06,164 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:06,165 INFO L82 PathProgramCache]: Analyzing trace with hash -742633620, now seen corresponding path program 32 times [2020-07-21 16:02:06,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:06,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094709922] [2020-07-21 16:02:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:06,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:06,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 16:02:06,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5780 backedges. 3131 proven. 453 refuted. 0 times theorem prover too weak. 2196 trivial. 0 not checked. [2020-07-21 16:02:07,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:11,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:11,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:11,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:11,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:11,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:11,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:11,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:11,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:13,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:13,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:13,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:13,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:13,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:13,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:13,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:13,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:13,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5780 backedges. 654 proven. 1042 refuted. 0 times theorem prover too weak. 4084 trivial. 0 not checked. [2020-07-21 16:02:14,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094709922] [2020-07-21 16:02:14,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:14,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 16:02:14,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001965726] [2020-07-21 16:02:14,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 16:02:14,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:14,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 16:02:14,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:02:14,157 INFO L87 Difference]: Start difference. First operand 317 states and 551 transitions. Second operand 27 states. [2020-07-21 16:02:16,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:16,155 INFO L93 Difference]: Finished difference Result 697 states and 1327 transitions. [2020-07-21 16:02:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 16:02:16,157 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 450 [2020-07-21 16:02:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:16,163 INFO L225 Difference]: With dead ends: 697 [2020-07-21 16:02:16,163 INFO L226 Difference]: Without dead ends: 374 [2020-07-21 16:02:16,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 853 SyntacticMatches, 21 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 16:02:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-07-21 16:02:16,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 335. [2020-07-21 16:02:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-07-21 16:02:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 603 transitions. [2020-07-21 16:02:16,185 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 603 transitions. Word has length 450 [2020-07-21 16:02:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:16,185 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 603 transitions. [2020-07-21 16:02:16,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 16:02:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 603 transitions. [2020-07-21 16:02:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2020-07-21 16:02:16,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:16,192 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 38, 37, 27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 16, 16, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:16,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:16,393 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:16,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1807970820, now seen corresponding path program 33 times [2020-07-21 16:02:16,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:16,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428779317] [2020-07-21 16:02:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:17,062 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:17,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:17,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 16:02:17,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15309 backedges. 8409 proven. 800 refuted. 0 times theorem prover too weak. 6100 trivial. 0 not checked. [2020-07-21 16:02:17,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:23,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:24,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:24,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:24,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:24,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:24,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:24,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:24,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:24,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:26,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:26,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:26,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:26,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:26,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:26,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:26,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 15309 backedges. 846 proven. 2356 refuted. 0 times theorem prover too weak. 12107 trivial. 0 not checked. [2020-07-21 16:02:27,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428779317] [2020-07-21 16:02:27,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:27,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-21 16:02:27,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868241431] [2020-07-21 16:02:27,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 16:02:27,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:27,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 16:02:27,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2020-07-21 16:02:27,015 INFO L87 Difference]: Start difference. First operand 335 states and 603 transitions. Second operand 29 states. [2020-07-21 16:02:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:29,271 INFO L93 Difference]: Finished difference Result 841 states and 1616 transitions. [2020-07-21 16:02:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 16:02:29,272 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 724 [2020-07-21 16:02:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:29,279 INFO L225 Difference]: With dead ends: 841 [2020-07-21 16:02:29,279 INFO L226 Difference]: Without dead ends: 475 [2020-07-21 16:02:29,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1473 GetRequests, 1397 SyntacticMatches, 23 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=465, Invalid=2505, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 16:02:29,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-07-21 16:02:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 438. [2020-07-21 16:02:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-07-21 16:02:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 806 transitions. [2020-07-21 16:02:29,306 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 806 transitions. Word has length 724 [2020-07-21 16:02:29,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:29,307 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 806 transitions. [2020-07-21 16:02:29,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 16:02:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 806 transitions. [2020-07-21 16:02:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2020-07-21 16:02:29,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:29,315 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 41, 41, 27, 27, 23, 23, 23, 23, 23, 23, 23, 20, 20, 20, 20, 20, 20, 20, 19, 14, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:29,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:29,527 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash -684685032, now seen corresponding path program 34 times [2020-07-21 16:02:29,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:29,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920638858] [2020-07-21 16:02:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:30,265 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:30,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1300 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:02:30,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9894 backedges. 315 proven. 1160 refuted. 0 times theorem prover too weak. 8419 trivial. 0 not checked. [2020-07-21 16:02:30,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:34,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:34,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:35,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:36,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:36,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:36,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:36,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:37,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:37,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:37,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:37,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9894 backedges. 315 proven. 1184 refuted. 0 times theorem prover too weak. 8395 trivial. 0 not checked. [2020-07-21 16:02:37,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920638858] [2020-07-21 16:02:37,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:37,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:02:37,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987953789] [2020-07-21 16:02:37,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:02:37,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:02:37,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:02:37,581 INFO L87 Difference]: Start difference. First operand 438 states and 806 transitions. Second operand 20 states. [2020-07-21 16:02:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:38,215 INFO L93 Difference]: Finished difference Result 461 states and 878 transitions. [2020-07-21 16:02:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:02:38,218 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 583 [2020-07-21 16:02:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:38,226 INFO L225 Difference]: With dead ends: 461 [2020-07-21 16:02:38,226 INFO L226 Difference]: Without dead ends: 457 [2020-07-21 16:02:38,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1172 GetRequests, 1133 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:02:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-07-21 16:02:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 421. [2020-07-21 16:02:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-07-21 16:02:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 755 transitions. [2020-07-21 16:02:38,255 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 755 transitions. Word has length 583 [2020-07-21 16:02:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:38,256 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 755 transitions. [2020-07-21 16:02:38,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:02:38,256 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 755 transitions. [2020-07-21 16:02:38,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2020-07-21 16:02:38,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:38,265 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 32, 31, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 17, 17, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:38,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:38,467 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash -357228653, now seen corresponding path program 35 times [2020-07-21 16:02:38,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:38,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135223123] [2020-07-21 16:02:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:39,242 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:39,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:39,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:02:39,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12385 backedges. 5096 proven. 223 refuted. 0 times theorem prover too weak. 7066 trivial. 0 not checked. [2020-07-21 16:02:39,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:44,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:44,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:44,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:44,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:45,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:45,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:46,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:46,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:46,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12385 backedges. 474 proven. 1933 refuted. 0 times theorem prover too weak. 9978 trivial. 0 not checked. [2020-07-21 16:02:46,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135223123] [2020-07-21 16:02:46,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:46,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-21 16:02:46,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132976485] [2020-07-21 16:02:46,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 16:02:46,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:46,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 16:02:46,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:02:46,511 INFO L87 Difference]: Start difference. First operand 421 states and 755 transitions. Second operand 23 states. [2020-07-21 16:02:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:47,380 INFO L93 Difference]: Finished difference Result 866 states and 1598 transitions. [2020-07-21 16:02:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 16:02:47,381 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 652 [2020-07-21 16:02:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:47,386 INFO L225 Difference]: With dead ends: 866 [2020-07-21 16:02:47,386 INFO L226 Difference]: Without dead ends: 430 [2020-07-21 16:02:47,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1318 GetRequests, 1265 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 16:02:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-07-21 16:02:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 394. [2020-07-21 16:02:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-07-21 16:02:47,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 711 transitions. [2020-07-21 16:02:47,414 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 711 transitions. Word has length 652 [2020-07-21 16:02:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:47,414 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 711 transitions. [2020-07-21 16:02:47,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 16:02:47,414 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 711 transitions. [2020-07-21 16:02:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2020-07-21 16:02:47,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:47,420 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 41, 41, 27, 27, 25, 25, 25, 25, 25, 25, 25, 23, 20, 20, 20, 20, 20, 20, 20, 14, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:47,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:47,621 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:47,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1127604422, now seen corresponding path program 36 times [2020-07-21 16:02:47,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:47,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625303941] [2020-07-21 16:02:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:48,336 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:48,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:48,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:02:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10842 backedges. 4948 proven. 615 refuted. 0 times theorem prover too weak. 5279 trivial. 0 not checked. [2020-07-21 16:02:48,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:51,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:52,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:52,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:52,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:52,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:52,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:53,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:53,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:53,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:53,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:53,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:53,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10842 backedges. 873 proven. 1136 refuted. 0 times theorem prover too weak. 8833 trivial. 0 not checked. [2020-07-21 16:02:54,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625303941] [2020-07-21 16:02:54,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:54,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-21 16:02:54,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997421844] [2020-07-21 16:02:54,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 16:02:54,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:54,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 16:02:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:02:54,289 INFO L87 Difference]: Start difference. First operand 394 states and 711 transitions. Second operand 23 states. [2020-07-21 16:02:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:55,777 INFO L93 Difference]: Finished difference Result 1040 states and 2066 transitions. [2020-07-21 16:02:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-21 16:02:55,779 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 607 [2020-07-21 16:02:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:55,788 INFO L225 Difference]: With dead ends: 1040 [2020-07-21 16:02:55,788 INFO L226 Difference]: Without dead ends: 574 [2020-07-21 16:02:55,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1233 GetRequests, 1175 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2020-07-21 16:02:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-07-21 16:02:55,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 481. [2020-07-21 16:02:55,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-07-21 16:02:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 925 transitions. [2020-07-21 16:02:55,829 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 925 transitions. Word has length 607 [2020-07-21 16:02:55,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:55,830 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 925 transitions. [2020-07-21 16:02:55,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 16:02:55,830 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 925 transitions. [2020-07-21 16:02:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2020-07-21 16:02:55,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:55,839 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 27, 27, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 20, 19, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:56,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:56,052 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:56,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1195857435, now seen corresponding path program 37 times [2020-07-21 16:02:56,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:56,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099656964] [2020-07-21 16:02:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:56,807 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:56,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:02:56,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11190 backedges. 520 proven. 1063 refuted. 0 times theorem prover too weak. 9607 trivial. 0 not checked. [2020-07-21 16:02:57,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:00,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11190 backedges. 522 proven. 1085 refuted. 0 times theorem prover too weak. 9583 trivial. 0 not checked. [2020-07-21 16:03:02,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099656964] [2020-07-21 16:03:02,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:02,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:03:02,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918107020] [2020-07-21 16:03:02,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:03:02,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:03:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:03:02,948 INFO L87 Difference]: Start difference. First operand 481 states and 925 transitions. Second operand 20 states. [2020-07-21 16:03:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:03,372 INFO L93 Difference]: Finished difference Result 531 states and 1121 transitions. [2020-07-21 16:03:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:03:03,373 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 619 [2020-07-21 16:03:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:03,378 INFO L225 Difference]: With dead ends: 531 [2020-07-21 16:03:03,379 INFO L226 Difference]: Without dead ends: 527 [2020-07-21 16:03:03,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1244 GetRequests, 1205 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:03:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-07-21 16:03:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 477. [2020-07-21 16:03:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-07-21 16:03:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 919 transitions. [2020-07-21 16:03:03,401 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 919 transitions. Word has length 619 [2020-07-21 16:03:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:03,402 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 919 transitions. [2020-07-21 16:03:03,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:03:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 919 transitions. [2020-07-21 16:03:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 837 [2020-07-21 16:03:03,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:03,409 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 60, 60, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 30, 30, 30, 30, 30, 30, 30, 26, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:03,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:03,610 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:03,611 INFO L82 PathProgramCache]: Analyzing trace with hash 375333436, now seen corresponding path program 38 times [2020-07-21 16:03:03,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:03,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271871536] [2020-07-21 16:03:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:04,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:03:04,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:04,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 16:03:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20865 backedges. 2049 proven. 1184 refuted. 0 times theorem prover too weak. 17632 trivial. 0 not checked. [2020-07-21 16:03:04,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:08,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:08,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:08,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:08,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:09,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:09,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:09,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:09,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:09,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:11,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20865 backedges. 2049 proven. 1207 refuted. 0 times theorem prover too weak. 17609 trivial. 0 not checked. [2020-07-21 16:03:12,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271871536] [2020-07-21 16:03:12,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:12,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 16:03:12,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461342268] [2020-07-21 16:03:12,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 16:03:12,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:12,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 16:03:12,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:03:12,478 INFO L87 Difference]: Start difference. First operand 477 states and 919 transitions. Second operand 27 states. [2020-07-21 16:03:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:14,406 INFO L93 Difference]: Finished difference Result 1301 states and 3120 transitions. [2020-07-21 16:03:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 16:03:14,407 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 836 [2020-07-21 16:03:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:14,417 INFO L225 Difference]: With dead ends: 1301 [2020-07-21 16:03:14,418 INFO L226 Difference]: Without dead ends: 694 [2020-07-21 16:03:14,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1696 GetRequests, 1625 SyntacticMatches, 21 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2020-07-21 16:03:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-07-21 16:03:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 613. [2020-07-21 16:03:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-07-21 16:03:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1443 transitions. [2020-07-21 16:03:14,458 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1443 transitions. Word has length 836 [2020-07-21 16:03:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:14,459 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 1443 transitions. [2020-07-21 16:03:14,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 16:03:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1443 transitions. [2020-07-21 16:03:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1046 [2020-07-21 16:03:14,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:14,476 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 77, 77, 48, 48, 40, 40, 40, 40, 40, 40, 40, 38, 38, 38, 38, 38, 38, 38, 32, 29, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:14,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:14,681 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1578377501, now seen corresponding path program 39 times [2020-07-21 16:03:14,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:14,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331868284] [2020-07-21 16:03:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:15,511 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:03:15,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:15,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 1536 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 16:03:15,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 32532 backedges. 17044 proven. 1342 refuted. 0 times theorem prover too weak. 14146 trivial. 0 not checked. [2020-07-21 16:03:16,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:23,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:24,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:24,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:24,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:24,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:24,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:27,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:27,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:27,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:28,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:28,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:28,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:28,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:28,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:28,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 32532 backedges. 1024 proven. 4475 refuted. 0 times theorem prover too weak. 27033 trivial. 0 not checked. [2020-07-21 16:03:29,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331868284] [2020-07-21 16:03:29,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:29,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 33 [2020-07-21 16:03:29,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004629230] [2020-07-21 16:03:29,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 16:03:29,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:29,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 16:03:29,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:03:29,079 INFO L87 Difference]: Start difference. First operand 613 states and 1443 transitions. Second operand 33 states. [2020-07-21 16:03:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:31,464 INFO L93 Difference]: Finished difference Result 1301 states and 3298 transitions. [2020-07-21 16:03:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-21 16:03:31,465 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1045 [2020-07-21 16:03:31,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:31,474 INFO L225 Difference]: With dead ends: 1301 [2020-07-21 16:03:31,475 INFO L226 Difference]: Without dead ends: 685 [2020-07-21 16:03:31,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2119 GetRequests, 2031 SyntacticMatches, 27 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=595, Invalid=3311, Unknown=0, NotChecked=0, Total=3906 [2020-07-21 16:03:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-07-21 16:03:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 559. [2020-07-21 16:03:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-07-21 16:03:31,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1301 transitions. [2020-07-21 16:03:31,520 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1301 transitions. Word has length 1045 [2020-07-21 16:03:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:31,521 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 1301 transitions. [2020-07-21 16:03:31,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 16:03:31,521 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1301 transitions. [2020-07-21 16:03:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2020-07-21 16:03:31,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:31,527 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 41, 41, 27, 27, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 17, 14, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:31,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:31,728 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1160645405, now seen corresponding path program 40 times [2020-07-21 16:03:31,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:31,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286973875] [2020-07-21 16:03:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:32,592 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:32,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:32,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:03:32,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9450 backedges. 361 proven. 890 refuted. 0 times theorem prover too weak. 8199 trivial. 0 not checked. [2020-07-21 16:03:32,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:35,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:37,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:37,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9450 backedges. 361 proven. 906 refuted. 0 times theorem prover too weak. 8183 trivial. 0 not checked. [2020-07-21 16:03:37,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286973875] [2020-07-21 16:03:37,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:37,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:03:37,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729581459] [2020-07-21 16:03:37,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:03:37,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:37,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:03:37,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:03:37,512 INFO L87 Difference]: Start difference. First operand 559 states and 1301 transitions. Second operand 18 states. [2020-07-21 16:03:37,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:37,918 INFO L93 Difference]: Finished difference Result 621 states and 1574 transitions. [2020-07-21 16:03:37,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:03:37,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 571 [2020-07-21 16:03:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:37,930 INFO L225 Difference]: With dead ends: 621 [2020-07-21 16:03:37,930 INFO L226 Difference]: Without dead ends: 617 [2020-07-21 16:03:37,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 1113 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:03:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2020-07-21 16:03:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 559. [2020-07-21 16:03:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-07-21 16:03:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1301 transitions. [2020-07-21 16:03:37,962 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1301 transitions. Word has length 571 [2020-07-21 16:03:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:37,962 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 1301 transitions. [2020-07-21 16:03:37,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:03:37,963 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1301 transitions. [2020-07-21 16:03:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2020-07-21 16:03:37,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:37,969 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 43, 43, 27, 27, 24, 24, 24, 24, 24, 24, 24, 21, 21, 21, 21, 21, 21, 21, 21, 16, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:38,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:38,170 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash -420897240, now seen corresponding path program 41 times [2020-07-21 16:03:38,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:38,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124117655] [2020-07-21 16:03:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:39,056 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:39,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:39,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:03:39,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10770 backedges. 506 proven. 831 refuted. 0 times theorem prover too weak. 9433 trivial. 0 not checked. [2020-07-21 16:03:39,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:42,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:42,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:43,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:43,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:43,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:43,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:43,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:43,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10770 backedges. 508 proven. 845 refuted. 0 times theorem prover too weak. 9417 trivial. 0 not checked. [2020-07-21 16:03:44,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124117655] [2020-07-21 16:03:44,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:44,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:03:44,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123770607] [2020-07-21 16:03:44,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:03:44,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:03:44,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:03:44,589 INFO L87 Difference]: Start difference. First operand 559 states and 1301 transitions. Second operand 18 states. [2020-07-21 16:03:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:45,006 INFO L93 Difference]: Finished difference Result 638 states and 1712 transitions. [2020-07-21 16:03:45,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:03:45,008 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 607 [2020-07-21 16:03:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:45,018 INFO L225 Difference]: With dead ends: 638 [2020-07-21 16:03:45,018 INFO L226 Difference]: Without dead ends: 634 [2020-07-21 16:03:45,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1219 GetRequests, 1185 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:03:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-07-21 16:03:45,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 559. [2020-07-21 16:03:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-07-21 16:03:45,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1301 transitions. [2020-07-21 16:03:45,054 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1301 transitions. Word has length 607 [2020-07-21 16:03:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:45,055 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 1301 transitions. [2020-07-21 16:03:45,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:03:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1301 transitions. [2020-07-21 16:03:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2020-07-21 16:03:45,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:45,061 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 41, 41, 27, 27, 23, 23, 23, 23, 23, 23, 23, 20, 20, 20, 20, 20, 20, 20, 19, 14, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:45,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:45,276 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:45,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1703371092, now seen corresponding path program 42 times [2020-07-21 16:03:45,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:45,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553050617] [2020-07-21 16:03:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:46,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:46,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1300 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:03:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9894 backedges. 470 proven. 809 refuted. 0 times theorem prover too weak. 8615 trivial. 0 not checked. [2020-07-21 16:03:46,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:49,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:49,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:50,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:50,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:50,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:50,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:50,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:50,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:50,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:50,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:50,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:50,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9894 backedges. 470 proven. 827 refuted. 0 times theorem prover too weak. 8597 trivial. 0 not checked. [2020-07-21 16:03:51,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553050617] [2020-07-21 16:03:51,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:51,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:03:51,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013688606] [2020-07-21 16:03:51,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:03:51,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:03:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:03:51,564 INFO L87 Difference]: Start difference. First operand 559 states and 1301 transitions. Second operand 18 states. [2020-07-21 16:03:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:51,984 INFO L93 Difference]: Finished difference Result 664 states and 1814 transitions. [2020-07-21 16:03:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:03:51,986 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 583 [2020-07-21 16:03:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:51,996 INFO L225 Difference]: With dead ends: 664 [2020-07-21 16:03:51,997 INFO L226 Difference]: Without dead ends: 660 [2020-07-21 16:03:51,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1171 GetRequests, 1137 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:03:51,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2020-07-21 16:03:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 564. [2020-07-21 16:03:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-07-21 16:03:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1330 transitions. [2020-07-21 16:03:52,031 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1330 transitions. Word has length 583 [2020-07-21 16:03:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:52,031 INFO L479 AbstractCegarLoop]: Abstraction has 564 states and 1330 transitions. [2020-07-21 16:03:52,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:03:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1330 transitions. [2020-07-21 16:03:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2020-07-21 16:03:52,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:52,037 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 44, 44, 27, 27, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 20, 17, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:52,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:52,238 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:52,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1879805078, now seen corresponding path program 43 times [2020-07-21 16:03:52,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:52,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081975825] [2020-07-21 16:03:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:53,110 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:53,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:03:53,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10746 backedges. 756 proven. 797 refuted. 0 times theorem prover too weak. 9193 trivial. 0 not checked. [2020-07-21 16:03:53,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:56,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:57,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10746 backedges. 760 proven. 817 refuted. 0 times theorem prover too weak. 9169 trivial. 0 not checked. [2020-07-21 16:04:00,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081975825] [2020-07-21 16:04:00,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:00,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:04:00,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723788829] [2020-07-21 16:04:00,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:04:00,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:00,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:04:00,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:04:00,167 INFO L87 Difference]: Start difference. First operand 564 states and 1330 transitions. Second operand 20 states. [2020-07-21 16:04:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:00,633 INFO L93 Difference]: Finished difference Result 607 states and 1550 transitions. [2020-07-21 16:04:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:04:00,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 607 [2020-07-21 16:04:00,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:00,644 INFO L225 Difference]: With dead ends: 607 [2020-07-21 16:04:00,644 INFO L226 Difference]: Without dead ends: 603 [2020-07-21 16:04:00,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1220 GetRequests, 1181 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:04:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-07-21 16:04:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 564. [2020-07-21 16:04:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-07-21 16:04:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1330 transitions. [2020-07-21 16:04:00,675 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1330 transitions. Word has length 607 [2020-07-21 16:04:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:00,676 INFO L479 AbstractCegarLoop]: Abstraction has 564 states and 1330 transitions. [2020-07-21 16:04:00,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:04:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1330 transitions. [2020-07-21 16:04:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2020-07-21 16:04:00,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:00,681 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 27, 27, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 18, 17, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:00,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:00,882 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:00,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1167752943, now seen corresponding path program 44 times [2020-07-21 16:04:00,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:00,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439549066] [2020-07-21 16:04:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:01,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:04:01,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:01,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:04:01,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10294 backedges. 700 proven. 601 refuted. 0 times theorem prover too weak. 8993 trivial. 0 not checked. [2020-07-21 16:04:02,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:04,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:04,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:05,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:05,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:05,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:05,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:05,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:06,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:06,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10294 backedges. 700 proven. 619 refuted. 0 times theorem prover too weak. 8975 trivial. 0 not checked. [2020-07-21 16:04:07,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439549066] [2020-07-21 16:04:07,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:07,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:04:07,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749189472] [2020-07-21 16:04:07,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:04:07,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:07,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:04:07,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:04:07,671 INFO L87 Difference]: Start difference. First operand 564 states and 1330 transitions. Second operand 18 states. [2020-07-21 16:04:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:08,103 INFO L93 Difference]: Finished difference Result 632 states and 1680 transitions. [2020-07-21 16:04:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:04:08,105 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 595 [2020-07-21 16:04:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:08,117 INFO L225 Difference]: With dead ends: 632 [2020-07-21 16:04:08,117 INFO L226 Difference]: Without dead ends: 628 [2020-07-21 16:04:08,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1195 GetRequests, 1161 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:04:08,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-07-21 16:04:08,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 564. [2020-07-21 16:04:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-07-21 16:04:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1330 transitions. [2020-07-21 16:04:08,153 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1330 transitions. Word has length 595 [2020-07-21 16:04:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:08,154 INFO L479 AbstractCegarLoop]: Abstraction has 564 states and 1330 transitions. [2020-07-21 16:04:08,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:04:08,154 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1330 transitions. [2020-07-21 16:04:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 741 [2020-07-21 16:04:08,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:08,161 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 53, 53, 34, 33, 29, 29, 29, 29, 29, 29, 29, 26, 26, 26, 26, 26, 26, 26, 24, 20, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:08,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:08,362 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:08,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1573416566, now seen corresponding path program 45 times [2020-07-21 16:04:08,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:08,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362983463] [2020-07-21 16:04:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:09,234 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:04:09,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:09,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 16:04:09,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16137 backedges. 1914 proven. 1439 refuted. 0 times theorem prover too weak. 12784 trivial. 0 not checked. [2020-07-21 16:04:09,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:14,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:15,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:15,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:16,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:16,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:16,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:16,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:16,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:16,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:18,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:18,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:19,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:19,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:19,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:19,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:19,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16137 backedges. 1916 proven. 1471 refuted. 0 times theorem prover too weak. 12750 trivial. 0 not checked. [2020-07-21 16:04:21,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362983463] [2020-07-21 16:04:21,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:21,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 31 [2020-07-21 16:04:21,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282325489] [2020-07-21 16:04:21,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 16:04:21,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:21,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 16:04:21,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-07-21 16:04:21,154 INFO L87 Difference]: Start difference. First operand 564 states and 1330 transitions. Second operand 31 states. [2020-07-21 16:04:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:24,829 INFO L93 Difference]: Finished difference Result 1506 states and 4425 transitions. [2020-07-21 16:04:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-21 16:04:24,832 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 740 [2020-07-21 16:04:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:24,849 INFO L225 Difference]: With dead ends: 1506 [2020-07-21 16:04:24,850 INFO L226 Difference]: Without dead ends: 869 [2020-07-21 16:04:24,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1511 GetRequests, 1425 SyntacticMatches, 25 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=593, Invalid=3313, Unknown=0, NotChecked=0, Total=3906 [2020-07-21 16:04:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2020-07-21 16:04:24,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 727. [2020-07-21 16:04:24,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2020-07-21 16:04:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2112 transitions. [2020-07-21 16:04:24,909 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2112 transitions. Word has length 740 [2020-07-21 16:04:24,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:24,909 INFO L479 AbstractCegarLoop]: Abstraction has 727 states and 2112 transitions. [2020-07-21 16:04:24,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 16:04:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2112 transitions. [2020-07-21 16:04:24,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2020-07-21 16:04:24,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:24,917 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 42, 42, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:25,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:25,118 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:25,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:25,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1911215152, now seen corresponding path program 46 times [2020-07-21 16:04:25,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:25,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810270542] [2020-07-21 16:04:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:25,988 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:04:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:25,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 16:04:25,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9674 backedges. 1692 proven. 608 refuted. 0 times theorem prover too weak. 7374 trivial. 0 not checked. [2020-07-21 16:04:26,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:29,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:29,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:30,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:30,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:31,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:31,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:32,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:33,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:33,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:33,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:33,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:33,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:34,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9674 backedges. 1692 proven. 632 refuted. 0 times theorem prover too weak. 7350 trivial. 0 not checked. [2020-07-21 16:04:35,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810270542] [2020-07-21 16:04:35,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:35,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-21 16:04:35,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104048135] [2020-07-21 16:04:35,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 16:04:35,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:35,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 16:04:35,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2020-07-21 16:04:35,687 INFO L87 Difference]: Start difference. First operand 727 states and 2112 transitions. Second operand 29 states. [2020-07-21 16:04:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:38,037 INFO L93 Difference]: Finished difference Result 1635 states and 4990 transitions. [2020-07-21 16:04:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 16:04:38,039 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 575 [2020-07-21 16:04:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:38,055 INFO L225 Difference]: With dead ends: 1635 [2020-07-21 16:04:38,056 INFO L226 Difference]: Without dead ends: 914 [2020-07-21 16:04:38,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1169 GetRequests, 1100 SyntacticMatches, 23 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=369, Invalid=1887, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 16:04:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2020-07-21 16:04:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 791. [2020-07-21 16:04:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 791 states. [2020-07-21 16:04:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2197 transitions. [2020-07-21 16:04:38,120 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2197 transitions. Word has length 575 [2020-07-21 16:04:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:38,120 INFO L479 AbstractCegarLoop]: Abstraction has 791 states and 2197 transitions. [2020-07-21 16:04:38,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 16:04:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2197 transitions. [2020-07-21 16:04:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2020-07-21 16:04:38,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:38,129 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 54, 54, 36, 34, 29, 29, 29, 29, 29, 29, 29, 27, 27, 27, 27, 27, 27, 27, 25, 18, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:38,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:38,330 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash 359093681, now seen corresponding path program 47 times [2020-07-21 16:04:38,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:38,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406526652] [2020-07-21 16:04:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:39,351 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:04:39,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:39,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 16:04:39,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16787 backedges. 9044 proven. 1034 refuted. 0 times theorem prover too weak. 6709 trivial. 0 not checked. [2020-07-21 16:04:39,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:47,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:47,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:48,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:48,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:48,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:48,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:51,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:53,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:53,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:53,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:54,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:54,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:54,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:54,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:54,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:54,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16787 backedges. 995 proven. 2603 refuted. 0 times theorem prover too weak. 13189 trivial. 0 not checked. [2020-07-21 16:04:54,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406526652] [2020-07-21 16:04:54,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:54,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 31 [2020-07-21 16:04:54,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645178703] [2020-07-21 16:04:54,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 16:04:54,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:54,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 16:04:54,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-07-21 16:04:54,828 INFO L87 Difference]: Start difference. First operand 791 states and 2197 transitions. Second operand 31 states. [2020-07-21 16:04:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:57,544 INFO L93 Difference]: Finished difference Result 1614 states and 4574 transitions. [2020-07-21 16:04:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-21 16:04:57,547 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 755 [2020-07-21 16:04:57,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:57,569 INFO L225 Difference]: With dead ends: 1614 [2020-07-21 16:04:57,569 INFO L226 Difference]: Without dead ends: 829 [2020-07-21 16:04:57,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1532 GetRequests, 1455 SyntacticMatches, 25 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=462, Invalid=2400, Unknown=0, NotChecked=0, Total=2862 [2020-07-21 16:04:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2020-07-21 16:04:57,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 791. [2020-07-21 16:04:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 791 states. [2020-07-21 16:04:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2183 transitions. [2020-07-21 16:04:57,644 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2183 transitions. Word has length 755 [2020-07-21 16:04:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:57,645 INFO L479 AbstractCegarLoop]: Abstraction has 791 states and 2183 transitions. [2020-07-21 16:04:57,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 16:04:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2183 transitions. [2020-07-21 16:04:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-07-21 16:04:57,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:57,659 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 52, 52, 30, 29, 27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 22, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:57,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:57,865 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:57,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:57,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1934508610, now seen corresponding path program 48 times [2020-07-21 16:04:57,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:57,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153687483] [2020-07-21 16:04:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:58,896 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:04:58,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:58,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1580 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:04:58,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14789 backedges. 662 proven. 644 refuted. 0 times theorem prover too weak. 13483 trivial. 0 not checked. [2020-07-21 16:04:59,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:05:03,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:03,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:04,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:04,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:04,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:04,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:04,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:04,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:04,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:04,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:05,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14789 backedges. 662 proven. 656 refuted. 0 times theorem prover too weak. 13471 trivial. 0 not checked. [2020-07-21 16:05:07,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153687483] [2020-07-21 16:05:07,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:05:07,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:05:07,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9809549] [2020-07-21 16:05:07,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:05:07,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:05:07,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:05:07,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:05:07,552 INFO L87 Difference]: Start difference. First operand 791 states and 2183 transitions. Second operand 16 states. [2020-07-21 16:05:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:05:08,116 INFO L93 Difference]: Finished difference Result 815 states and 2266 transitions. [2020-07-21 16:05:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:05:08,120 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 708 [2020-07-21 16:05:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:05:08,139 INFO L225 Difference]: With dead ends: 815 [2020-07-21 16:05:08,139 INFO L226 Difference]: Without dead ends: 811 [2020-07-21 16:05:08,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1420 GetRequests, 1391 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:05:08,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-07-21 16:05:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 781. [2020-07-21 16:05:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-07-21 16:05:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2152 transitions. [2020-07-21 16:05:08,202 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2152 transitions. Word has length 708 [2020-07-21 16:05:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:05:08,203 INFO L479 AbstractCegarLoop]: Abstraction has 781 states and 2152 transitions. [2020-07-21 16:05:08,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:05:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2152 transitions. [2020-07-21 16:05:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2020-07-21 16:05:08,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:05:08,227 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 46, 46, 27, 27, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 22, 19, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:05:08,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:08,428 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:05:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:05:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1976660776, now seen corresponding path program 49 times [2020-07-21 16:05:08,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:05:08,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250025114] [2020-07-21 16:05:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:09,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:05:09,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:05:09,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:05:09,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:05:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11662 backedges. 1228 proven. 391 refuted. 0 times theorem prover too weak. 10043 trivial. 0 not checked. [2020-07-21 16:05:09,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:05:12,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:12,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:13,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:13,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:14,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:14,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:14,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:14,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:14,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:14,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:14,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:14,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:15,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11662 backedges. 1232 proven. 411 refuted. 0 times theorem prover too weak. 10019 trivial. 0 not checked. [2020-07-21 16:05:18,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250025114] [2020-07-21 16:05:18,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:05:18,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 16:05:18,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487251294] [2020-07-21 16:05:18,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 16:05:18,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:05:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 16:05:18,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:05:18,195 INFO L87 Difference]: Start difference. First operand 781 states and 2152 transitions. Second operand 20 states. [2020-07-21 16:05:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:05:18,815 INFO L93 Difference]: Finished difference Result 794 states and 2183 transitions. [2020-07-21 16:05:18,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:05:18,817 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 631 [2020-07-21 16:05:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:05:18,829 INFO L225 Difference]: With dead ends: 794 [2020-07-21 16:05:18,829 INFO L226 Difference]: Without dead ends: 790 [2020-07-21 16:05:18,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1268 GetRequests, 1229 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:05:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2020-07-21 16:05:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 781. [2020-07-21 16:05:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-07-21 16:05:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2152 transitions. [2020-07-21 16:05:18,915 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2152 transitions. Word has length 631 [2020-07-21 16:05:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:05:18,916 INFO L479 AbstractCegarLoop]: Abstraction has 781 states and 2152 transitions. [2020-07-21 16:05:18,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 16:05:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2152 transitions. [2020-07-21 16:05:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2020-07-21 16:05:18,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:05:18,931 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 45, 45, 27, 27, 24, 24, 24, 24, 24, 24, 24, 22, 22, 22, 22, 22, 22, 22, 21, 18, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:05:19,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:19,146 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:05:19,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:05:19,146 INFO L82 PathProgramCache]: Analyzing trace with hash 114560669, now seen corresponding path program 50 times [2020-07-21 16:05:19,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:05:19,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375663029] [2020-07-21 16:05:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:20,296 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:05:20,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:05:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:05:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:05:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11202 backedges. 690 proven. 673 refuted. 0 times theorem prover too weak. 9839 trivial. 0 not checked. [2020-07-21 16:05:20,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:05:24,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:24,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:24,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:24,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:25,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:25,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:25,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:25,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:25,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:26,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11202 backedges. 692 proven. 687 refuted. 0 times theorem prover too weak. 9823 trivial. 0 not checked. [2020-07-21 16:05:27,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375663029] [2020-07-21 16:05:27,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:05:27,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:05:27,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313632110] [2020-07-21 16:05:27,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:05:27,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:05:27,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:05:27,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:05:27,516 INFO L87 Difference]: Start difference. First operand 781 states and 2152 transitions. Second operand 18 states. [2020-07-21 16:05:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:05:28,098 INFO L93 Difference]: Finished difference Result 805 states and 2248 transitions. [2020-07-21 16:05:28,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:05:28,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 619 [2020-07-21 16:05:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:05:28,113 INFO L225 Difference]: With dead ends: 805 [2020-07-21 16:05:28,113 INFO L226 Difference]: Without dead ends: 801 [2020-07-21 16:05:28,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1243 GetRequests, 1209 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:05:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2020-07-21 16:05:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 776. [2020-07-21 16:05:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-07-21 16:05:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2133 transitions. [2020-07-21 16:05:28,201 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2133 transitions. Word has length 619 [2020-07-21 16:05:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:05:28,202 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 2133 transitions. [2020-07-21 16:05:28,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:05:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2133 transitions. [2020-07-21 16:05:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2020-07-21 16:05:28,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:05:28,217 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 49, 49, 27, 27, 26, 26, 26, 26, 26, 26, 26, 25, 24, 24, 24, 24, 24, 24, 24, 22, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:05:28,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:28,430 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:05:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:05:28,430 INFO L82 PathProgramCache]: Analyzing trace with hash 677319965, now seen corresponding path program 51 times [2020-07-21 16:05:28,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:05:28,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698162939] [2020-07-21 16:05:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:29,587 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:05:29,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:05:29,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:05:29,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:05:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13114 backedges. 782 proven. 693 refuted. 0 times theorem prover too weak. 11639 trivial. 0 not checked. [2020-07-21 16:05:29,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:05:33,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:34,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:34,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:34,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:34,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:35,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:35,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13114 backedges. 786 proven. 705 refuted. 0 times theorem prover too weak. 11623 trivial. 0 not checked. [2020-07-21 16:05:37,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698162939] [2020-07-21 16:05:37,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:05:37,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:05:37,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616081288] [2020-07-21 16:05:37,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:05:37,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:05:37,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:05:37,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:05:37,125 INFO L87 Difference]: Start difference. First operand 776 states and 2133 transitions. Second operand 18 states. [2020-07-21 16:05:37,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:05:37,658 INFO L93 Difference]: Finished difference Result 843 states and 2431 transitions. [2020-07-21 16:05:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:05:37,660 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 667 [2020-07-21 16:05:37,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:05:37,674 INFO L225 Difference]: With dead ends: 843 [2020-07-21 16:05:37,674 INFO L226 Difference]: Without dead ends: 839 [2020-07-21 16:05:37,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1339 GetRequests, 1305 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:05:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2020-07-21 16:05:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 776. [2020-07-21 16:05:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-07-21 16:05:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2133 transitions. [2020-07-21 16:05:37,763 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2133 transitions. Word has length 667 [2020-07-21 16:05:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:05:37,764 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 2133 transitions. [2020-07-21 16:05:37,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:05:37,764 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2133 transitions. [2020-07-21 16:05:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2020-07-21 16:05:37,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:05:37,777 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 47, 47, 27, 27, 26, 26, 26, 26, 26, 26, 26, 25, 23, 23, 23, 23, 23, 23, 23, 20, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:05:37,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:37,992 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:05:37,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:05:37,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1445019716, now seen corresponding path program 52 times [2020-07-21 16:05:37,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:05:37,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874673645] [2020-07-21 16:05:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:39,081 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:05:39,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:05:39,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1462 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:05:39,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:05:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12642 backedges. 1078 proven. 369 refuted. 0 times theorem prover too weak. 11195 trivial. 0 not checked. [2020-07-21 16:05:39,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:05:41,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:42,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:43,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:43,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:43,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:43,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:44,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12642 backedges. 1080 proven. 385 refuted. 0 times theorem prover too weak. 11177 trivial. 0 not checked. [2020-07-21 16:05:47,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874673645] [2020-07-21 16:05:47,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:05:47,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:05:47,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540023081] [2020-07-21 16:05:47,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:05:47,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:05:47,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:05:47,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:05:47,029 INFO L87 Difference]: Start difference. First operand 776 states and 2133 transitions. Second operand 18 states. [2020-07-21 16:05:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:05:47,556 INFO L93 Difference]: Finished difference Result 840 states and 2469 transitions. [2020-07-21 16:05:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:05:47,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 655 [2020-07-21 16:05:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:05:47,573 INFO L225 Difference]: With dead ends: 840 [2020-07-21 16:05:47,573 INFO L226 Difference]: Without dead ends: 836 [2020-07-21 16:05:47,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1315 GetRequests, 1281 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:05:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2020-07-21 16:05:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 806. [2020-07-21 16:05:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-07-21 16:05:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2288 transitions. [2020-07-21 16:05:47,667 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2288 transitions. Word has length 655 [2020-07-21 16:05:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:05:47,667 INFO L479 AbstractCegarLoop]: Abstraction has 806 states and 2288 transitions. [2020-07-21 16:05:47,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:05:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2288 transitions. [2020-07-21 16:05:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 721 [2020-07-21 16:05:47,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:05:47,682 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 53, 53, 30, 29, 28, 28, 28, 28, 28, 28, 28, 26, 26, 26, 26, 26, 26, 26, 26, 24, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:05:47,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:47,898 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:05:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:05:47,898 INFO L82 PathProgramCache]: Analyzing trace with hash 28379835, now seen corresponding path program 53 times [2020-07-21 16:05:47,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:05:47,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421193590] [2020-07-21 16:05:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:48,974 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:05:48,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:05:48,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:05:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:05:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15325 backedges. 1199 proven. 401 refuted. 0 times theorem prover too weak. 13725 trivial. 0 not checked. [2020-07-21 16:05:49,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:05:52,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:52,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:53,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:53,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:53,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:53,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:53,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:53,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:53,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:53,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:55,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 15325 backedges. 1203 proven. 415 refuted. 0 times theorem prover too weak. 13707 trivial. 0 not checked. [2020-07-21 16:05:57,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421193590] [2020-07-21 16:05:57,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:05:57,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:05:57,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191983047] [2020-07-21 16:05:57,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:05:57,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:05:57,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:05:57,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:05:57,917 INFO L87 Difference]: Start difference. First operand 806 states and 2288 transitions. Second operand 18 states. [2020-07-21 16:05:58,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:05:58,544 INFO L93 Difference]: Finished difference Result 866 states and 2598 transitions. [2020-07-21 16:05:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:05:58,546 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 720 [2020-07-21 16:05:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:05:58,558 INFO L225 Difference]: With dead ends: 866 [2020-07-21 16:05:58,558 INFO L226 Difference]: Without dead ends: 862 [2020-07-21 16:05:58,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1445 GetRequests, 1411 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:05:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2020-07-21 16:05:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 808. [2020-07-21 16:05:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2020-07-21 16:05:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2291 transitions. [2020-07-21 16:05:58,612 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2291 transitions. Word has length 720 [2020-07-21 16:05:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:05:58,612 INFO L479 AbstractCegarLoop]: Abstraction has 808 states and 2291 transitions. [2020-07-21 16:05:58,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:05:58,613 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2291 transitions. [2020-07-21 16:05:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2020-07-21 16:05:58,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:05:58,621 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 58, 58, 34, 33, 30, 30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 28, 24, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:05:58,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:58,822 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:05:58,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:05:58,823 INFO L82 PathProgramCache]: Analyzing trace with hash -424239238, now seen corresponding path program 54 times [2020-07-21 16:05:58,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:05:58,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529641631] [2020-07-21 16:05:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:59,926 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:05:59,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:05:59,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 16:05:59,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:06:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18385 backedges. 1443 proven. 2652 refuted. 0 times theorem prover too weak. 14290 trivial. 0 not checked. [2020-07-21 16:06:00,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:06:03,027 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:06:06,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:07,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:07,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:08,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:08,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:08,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:08,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:08,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:08,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:14,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:14,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:15,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:16,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:17,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:17,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:17,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:17,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:17,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:17,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18385 backedges. 1445 proven. 2696 refuted. 0 times theorem prover too weak. 14244 trivial. 0 not checked. [2020-07-21 16:06:18,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529641631] [2020-07-21 16:06:18,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:06:18,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 31] total 35 [2020-07-21 16:06:18,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170948103] [2020-07-21 16:06:18,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 16:06:18,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:06:18,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 16:06:18,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 16:06:18,226 INFO L87 Difference]: Start difference. First operand 808 states and 2291 transitions. Second operand 35 states. [2020-07-21 16:06:21,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:06:21,858 INFO L93 Difference]: Finished difference Result 1735 states and 5450 transitions. [2020-07-21 16:06:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-21 16:06:21,861 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 788 [2020-07-21 16:06:21,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:06:21,875 INFO L225 Difference]: With dead ends: 1735 [2020-07-21 16:06:21,875 INFO L226 Difference]: Without dead ends: 929 [2020-07-21 16:06:21,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1606 GetRequests, 1513 SyntacticMatches, 29 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=639, Invalid=3651, Unknown=0, NotChecked=0, Total=4290 [2020-07-21 16:06:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2020-07-21 16:06:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 871. [2020-07-21 16:06:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2020-07-21 16:06:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2559 transitions. [2020-07-21 16:06:21,941 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2559 transitions. Word has length 788 [2020-07-21 16:06:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:06:21,942 INFO L479 AbstractCegarLoop]: Abstraction has 871 states and 2559 transitions. [2020-07-21 16:06:21,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 16:06:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2559 transitions. [2020-07-21 16:06:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2020-07-21 16:06:21,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:06:21,951 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 30, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:06:22,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:06:22,152 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:06:22,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:06:22,153 INFO L82 PathProgramCache]: Analyzing trace with hash 695959657, now seen corresponding path program 55 times [2020-07-21 16:06:22,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:06:22,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755721860] [2020-07-21 16:06:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:06:23,355 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:06:23,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:06:23,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:06:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:06:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16409 backedges. 333 proven. 2111 refuted. 0 times theorem prover too weak. 13965 trivial. 0 not checked. [2020-07-21 16:06:23,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:06:31,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:33,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:35,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:35,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:36,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:36,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:37,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:37,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:37,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:37,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:37,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:37,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:37,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16409 backedges. 333 proven. 2151 refuted. 0 times theorem prover too weak. 13925 trivial. 0 not checked. [2020-07-21 16:06:38,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755721860] [2020-07-21 16:06:38,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:06:38,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 16:06:38,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600086248] [2020-07-21 16:06:38,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 16:06:38,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:06:38,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 16:06:38,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:06:38,093 INFO L87 Difference]: Start difference. First operand 871 states and 2559 transitions. Second operand 24 states. [2020-07-21 16:06:39,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:06:39,009 INFO L93 Difference]: Finished difference Result 881 states and 2581 transitions. [2020-07-21 16:06:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 16:06:39,012 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 744 [2020-07-21 16:06:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:06:39,024 INFO L225 Difference]: With dead ends: 881 [2020-07-21 16:06:39,024 INFO L226 Difference]: Without dead ends: 877 [2020-07-21 16:06:39,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1496 GetRequests, 1447 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:06:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2020-07-21 16:06:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 849. [2020-07-21 16:06:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 849 states. [2020-07-21 16:06:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2442 transitions. [2020-07-21 16:06:39,089 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2442 transitions. Word has length 744 [2020-07-21 16:06:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:06:39,089 INFO L479 AbstractCegarLoop]: Abstraction has 849 states and 2442 transitions. [2020-07-21 16:06:39,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 16:06:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2442 transitions. [2020-07-21 16:06:39,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1288 [2020-07-21 16:06:39,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:06:39,105 INFO L422 BasicCegarLoop]: trace histogram [98, 98, 95, 95, 62, 60, 49, 49, 49, 49, 49, 49, 49, 47, 47, 47, 47, 47, 47, 47, 36, 35, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:06:39,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:06:39,306 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:06:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:06:39,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2029277787, now seen corresponding path program 56 times [2020-07-21 16:06:39,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:06:39,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262894717] [2020-07-21 16:06:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:06:40,607 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:06:40,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:06:40,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:06:40,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:06:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49561 backedges. 18003 proven. 466 refuted. 0 times theorem prover too weak. 31092 trivial. 0 not checked. [2020-07-21 16:06:41,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:06:54,137 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 16:06:57,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:57,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:58,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:58,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:58,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:58,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:58,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:59,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:06:59,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:00,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:00,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:00,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:00,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 49561 backedges. 1045 proven. 4520 refuted. 0 times theorem prover too weak. 43996 trivial. 0 not checked. [2020-07-21 16:07:01,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262894717] [2020-07-21 16:07:01,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:07:01,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-21 16:07:01,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511553499] [2020-07-21 16:07:01,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 16:07:01,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:07:01,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 16:07:01,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-21 16:07:01,271 INFO L87 Difference]: Start difference. First operand 849 states and 2442 transitions. Second operand 25 states. [2020-07-21 16:07:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:07:03,536 INFO L93 Difference]: Finished difference Result 1839 states and 5274 transitions. [2020-07-21 16:07:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 16:07:03,539 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1287 [2020-07-21 16:07:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:07:03,553 INFO L225 Difference]: With dead ends: 1839 [2020-07-21 16:07:03,553 INFO L226 Difference]: Without dead ends: 989 [2020-07-21 16:07:03,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2593 GetRequests, 2531 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 16:07:03,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2020-07-21 16:07:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 843. [2020-07-21 16:07:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-07-21 16:07:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2360 transitions. [2020-07-21 16:07:03,625 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2360 transitions. Word has length 1287 [2020-07-21 16:07:03,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:07:03,625 INFO L479 AbstractCegarLoop]: Abstraction has 843 states and 2360 transitions. [2020-07-21 16:07:03,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 16:07:03,625 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2360 transitions. [2020-07-21 16:07:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1723 [2020-07-21 16:07:03,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:07:03,648 INFO L422 BasicCegarLoop]: trace histogram [136, 136, 123, 123, 81, 80, 68, 68, 68, 68, 68, 68, 68, 61, 61, 61, 61, 61, 61, 61, 55, 43, 20, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:07:03,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:07:03,850 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:07:03,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:07:03,851 INFO L82 PathProgramCache]: Analyzing trace with hash -453075368, now seen corresponding path program 57 times [2020-07-21 16:07:03,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:07:03,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301186942] [2020-07-21 16:07:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:07:05,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:07:05,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:07:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 2538 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 16:07:05,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:07:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 89564 backedges. 24896 proven. 575 refuted. 0 times theorem prover too weak. 64093 trivial. 0 not checked. [2020-07-21 16:07:06,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:07:08,337 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 16:07:32,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:32,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:32,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:33,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:33,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:33,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:35,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:35,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:36,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:36,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:37,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:37,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:37,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:37,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:37,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 89564 backedges. 1138 proven. 7691 refuted. 0 times theorem prover too weak. 80735 trivial. 0 not checked. [2020-07-21 16:07:39,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301186942] [2020-07-21 16:07:39,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:07:39,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-21 16:07:39,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820012838] [2020-07-21 16:07:39,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 16:07:39,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:07:39,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 16:07:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2020-07-21 16:07:39,850 INFO L87 Difference]: Start difference. First operand 843 states and 2360 transitions. Second operand 29 states. [2020-07-21 16:07:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:07:43,249 INFO L93 Difference]: Finished difference Result 1617 states and 4542 transitions. [2020-07-21 16:07:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 16:07:43,253 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 1722 [2020-07-21 16:07:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:07:43,263 INFO L225 Difference]: With dead ends: 1617 [2020-07-21 16:07:43,263 INFO L226 Difference]: Without dead ends: 738 [2020-07-21 16:07:43,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3467 GetRequests, 3393 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=443, Invalid=2313, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 16:07:43,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2020-07-21 16:07:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 422. [2020-07-21 16:07:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-07-21 16:07:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 877 transitions. [2020-07-21 16:07:43,302 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 877 transitions. Word has length 1722 [2020-07-21 16:07:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:07:43,303 INFO L479 AbstractCegarLoop]: Abstraction has 422 states and 877 transitions. [2020-07-21 16:07:43,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 16:07:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 877 transitions. [2020-07-21 16:07:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 869 [2020-07-21 16:07:43,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:07:43,313 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 38, 37, 33, 33, 33, 33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 28, 28, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:07:43,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:07:43,514 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:07:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:07:43,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1375708098, now seen corresponding path program 58 times [2020-07-21 16:07:43,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:07:43,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506658453] [2020-07-21 16:07:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:07:44,824 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:07:44,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:07:44,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 16:07:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:07:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 22365 backedges. 11587 proven. 554 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2020-07-21 16:07:45,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:07:55,728 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 16:07:59,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:59,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:59,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:59,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:59,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:07:59,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:02,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:02,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:03,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:03,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:03,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:04,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:04,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:04,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 22365 backedges. 977 proven. 2770 refuted. 0 times theorem prover too weak. 18618 trivial. 0 not checked. [2020-07-21 16:08:04,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506658453] [2020-07-21 16:08:04,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:08:04,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 16:08:04,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065938225] [2020-07-21 16:08:04,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 16:08:04,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:08:04,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 16:08:04,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:08:04,945 INFO L87 Difference]: Start difference. First operand 422 states and 877 transitions. Second operand 27 states. [2020-07-21 16:08:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:08:07,960 INFO L93 Difference]: Finished difference Result 875 states and 1843 transitions. [2020-07-21 16:08:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 16:08:07,965 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 868 [2020-07-21 16:08:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:08:07,972 INFO L225 Difference]: With dead ends: 875 [2020-07-21 16:08:07,973 INFO L226 Difference]: Without dead ends: 445 [2020-07-21 16:08:07,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1753 GetRequests, 1689 SyntacticMatches, 21 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 16:08:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-07-21 16:08:08,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 405. [2020-07-21 16:08:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-07-21 16:08:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 803 transitions. [2020-07-21 16:08:08,005 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 803 transitions. Word has length 868 [2020-07-21 16:08:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:08:08,005 INFO L479 AbstractCegarLoop]: Abstraction has 405 states and 803 transitions. [2020-07-21 16:08:08,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 16:08:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 803 transitions. [2020-07-21 16:08:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1622 [2020-07-21 16:08:08,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:08:08,023 INFO L422 BasicCegarLoop]: trace histogram [130, 130, 113, 113, 78, 78, 65, 65, 65, 65, 65, 65, 65, 56, 56, 56, 56, 56, 56, 56, 52, 35, 22, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:08:08,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:08:08,224 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:08:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:08:08,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2081752550, now seen corresponding path program 59 times [2020-07-21 16:08:08,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:08:08,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631563068] [2020-07-21 16:08:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:08:09,755 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:08:09,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:08:09,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 2394 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 16:08:09,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:08:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 79338 backedges. 41047 proven. 3540 refuted. 0 times theorem prover too weak. 34751 trivial. 0 not checked. [2020-07-21 16:08:11,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:08:16,642 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 16:08:41,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:41,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:44,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:46,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:47,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:48,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:48,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:48,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:48,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:48,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:48,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:54,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:56,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:56,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:57,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:58,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:58,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:58,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:08:59,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 79338 backedges. 1893 proven. 8201 refuted. 0 times theorem prover too weak. 69244 trivial. 0 not checked. [2020-07-21 16:09:00,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631563068] [2020-07-21 16:09:00,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:09:00,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 39 [2020-07-21 16:09:00,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472944842] [2020-07-21 16:09:00,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-21 16:09:00,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:09:00,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-21 16:09:00,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 16:09:00,288 INFO L87 Difference]: Start difference. First operand 405 states and 803 transitions. Second operand 39 states. [2020-07-21 16:09:09,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:09:09,055 INFO L93 Difference]: Finished difference Result 1001 states and 2203 transitions. [2020-07-21 16:09:09,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-21 16:09:09,060 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 1621 [2020-07-21 16:09:09,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:09:09,068 INFO L225 Difference]: With dead ends: 1001 [2020-07-21 16:09:09,068 INFO L226 Difference]: Without dead ends: 602 [2020-07-21 16:09:09,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3279 GetRequests, 3175 SyntacticMatches, 29 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=835, Invalid=5017, Unknown=0, NotChecked=0, Total=5852 [2020-07-21 16:09:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-07-21 16:09:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 466. [2020-07-21 16:09:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-07-21 16:09:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 911 transitions. [2020-07-21 16:09:09,118 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 911 transitions. Word has length 1621 [2020-07-21 16:09:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:09:09,119 INFO L479 AbstractCegarLoop]: Abstraction has 466 states and 911 transitions. [2020-07-21 16:09:09,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-21 16:09:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 911 transitions. [2020-07-21 16:09:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2020-07-21 16:09:09,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:09:09,132 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 53, 53, 34, 33, 28, 28, 28, 28, 28, 28, 28, 26, 26, 26, 26, 26, 26, 26, 23, 19, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:09:09,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:09:09,346 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:09:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:09:09,347 INFO L82 PathProgramCache]: Analyzing trace with hash 117187843, now seen corresponding path program 60 times [2020-07-21 16:09:09,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:09:09,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060581679] [2020-07-21 16:09:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:09:10,723 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:09:10,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:09:10,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 16:09:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:09:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 15573 backedges. 7850 proven. 1299 refuted. 0 times theorem prover too weak. 6424 trivial. 0 not checked. [2020-07-21 16:09:11,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:09:17,404 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 16:09:21,252 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:09:21,359 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:09:26,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:26,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:27,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:28,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:28,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:28,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:28,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:29,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:29,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:35,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:37,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:37,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:38,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:38,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:39,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:39,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:39,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:39,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:39,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:09:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15573 backedges. 1103 proven. 2590 refuted. 0 times theorem prover too weak. 11880 trivial. 0 not checked. [2020-07-21 16:09:40,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060581679] [2020-07-21 16:09:40,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:09:40,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 33 [2020-07-21 16:09:40,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787149554] [2020-07-21 16:09:40,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 16:09:40,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:09:40,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 16:09:40,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:09:40,231 INFO L87 Difference]: Start difference. First operand 466 states and 911 transitions. Second operand 33 states. [2020-07-21 16:09:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:09:45,960 INFO L93 Difference]: Finished difference Result 950 states and 1944 transitions. [2020-07-21 16:09:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-21 16:09:45,965 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 728 [2020-07-21 16:09:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:09:45,971 INFO L225 Difference]: With dead ends: 950 [2020-07-21 16:09:45,971 INFO L226 Difference]: Without dead ends: 470 [2020-07-21 16:09:45,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1480 GetRequests, 1397 SyntacticMatches, 27 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=505, Invalid=2801, Unknown=0, NotChecked=0, Total=3306 [2020-07-21 16:09:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-07-21 16:09:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 393. [2020-07-21 16:09:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-07-21 16:09:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 670 transitions. [2020-07-21 16:09:45,996 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 670 transitions. Word has length 728 [2020-07-21 16:09:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:09:45,996 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 670 transitions. [2020-07-21 16:09:45,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 16:09:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 670 transitions. [2020-07-21 16:09:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1023 [2020-07-21 16:09:46,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:09:46,004 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 55, 54, 38, 38, 38, 38, 38, 38, 38, 37, 37, 37, 37, 37, 37, 37, 22, 20, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:09:46,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:09:46,206 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:09:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:09:46,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1732343786, now seen corresponding path program 61 times [2020-07-21 16:09:46,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:09:46,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395760700] [2020-07-21 16:09:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:09:47,724 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:09:47,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:09:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1515 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 16:09:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:09:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30892 backedges. 1935 proven. 3947 refuted. 0 times theorem prover too weak. 25010 trivial. 0 not checked. [2020-07-21 16:09:49,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:09:51,436 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:09:51,541 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:09:52,208 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:52,323 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:52,448 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:09:52,568 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:09:58,515 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:09:58,623 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:09:58,728 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:10:03,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:03,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:06,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:06,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:08,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:08,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:09,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:09,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:10,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:10,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:10,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:10,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:10,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:13,136 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:10:13,238 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:10:13,352 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:10:13,466 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:10:14,164 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:10:14,283 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:10:14,411 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:10:14,526 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:10:14,639 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 16:10:14,939 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 16:10:19,921 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:10:20,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:20,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:22,801 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 16:10:24,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:24,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:26,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:26,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:27,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:28,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:28,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:28,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:29,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:29,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30892 backedges. 1939 proven. 4000 refuted. 0 times theorem prover too weak. 24953 trivial. 0 not checked. [2020-07-21 16:10:29,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395760700] [2020-07-21 16:10:29,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:10:29,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 37 [2020-07-21 16:10:29,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278538703] [2020-07-21 16:10:29,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-21 16:10:29,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:10:29,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-21 16:10:29,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 16:10:29,813 INFO L87 Difference]: Start difference. First operand 393 states and 670 transitions. Second operand 37 states. [2020-07-21 16:10:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:10:39,124 INFO L93 Difference]: Finished difference Result 1011 states and 1840 transitions. [2020-07-21 16:10:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-21 16:10:39,131 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 1022 [2020-07-21 16:10:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:10:39,140 INFO L225 Difference]: With dead ends: 1011 [2020-07-21 16:10:39,140 INFO L226 Difference]: Without dead ends: 487 [2020-07-21 16:10:39,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2079 GetRequests, 1977 SyntacticMatches, 31 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=770, Invalid=4486, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 16:10:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-07-21 16:10:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 431. [2020-07-21 16:10:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-07-21 16:10:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 747 transitions. [2020-07-21 16:10:39,179 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 747 transitions. Word has length 1022 [2020-07-21 16:10:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:10:39,179 INFO L479 AbstractCegarLoop]: Abstraction has 431 states and 747 transitions. [2020-07-21 16:10:39,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-21 16:10:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 747 transitions. [2020-07-21 16:10:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2020-07-21 16:10:39,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:10:39,186 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 48, 48, 38, 37, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 14, 13, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:10:39,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:10:39,387 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:10:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:10:39,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2089111318, now seen corresponding path program 62 times [2020-07-21 16:10:39,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:10:39,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370042687] [2020-07-21 16:10:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:10:40,897 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:10:40,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:10:40,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 16:10:40,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:10:41,015 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2020-07-21 16:10:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13285 backedges. 1539 proven. 2124 refuted. 0 times theorem prover too weak. 9622 trivial. 0 not checked. [2020-07-21 16:10:42,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:10:44,411 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:10:44,520 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:10:45,141 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:10:45,254 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:10:45,374 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:10:45,495 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:10:47,427 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:10:47,532 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:10:47,636 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:10:52,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:52,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:53,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:53,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:54,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:54,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:55,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:55,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:55,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:56,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:56,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:58,887 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:10:58,989 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:10:59,098 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:10:59,205 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:10:59,310 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 16:11:03,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:03,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:06,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:07,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:07,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:08,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:09,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:09,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:09,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:10,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:10,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13285 backedges. 1539 proven. 2178 refuted. 0 times theorem prover too weak. 9568 trivial. 0 not checked. [2020-07-21 16:11:10,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370042687] [2020-07-21 16:11:10,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:11:10,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 37 [2020-07-21 16:11:10,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280047418] [2020-07-21 16:11:10,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-21 16:11:10,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:11:10,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-21 16:11:10,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 16:11:10,558 INFO L87 Difference]: Start difference. First operand 431 states and 747 transitions. Second operand 37 states. [2020-07-21 16:11:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:11:17,411 INFO L93 Difference]: Finished difference Result 894 states and 1590 transitions. [2020-07-21 16:11:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-21 16:11:17,417 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 676 [2020-07-21 16:11:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:11:17,423 INFO L225 Difference]: With dead ends: 894 [2020-07-21 16:11:17,424 INFO L226 Difference]: Without dead ends: 469 [2020-07-21 16:11:17,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1382 GetRequests, 1285 SyntacticMatches, 31 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=665, Invalid=3891, Unknown=0, NotChecked=0, Total=4556 [2020-07-21 16:11:17,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-07-21 16:11:17,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 367. [2020-07-21 16:11:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-07-21 16:11:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 560 transitions. [2020-07-21 16:11:17,452 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 560 transitions. Word has length 676 [2020-07-21 16:11:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:11:17,453 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 560 transitions. [2020-07-21 16:11:17,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-21 16:11:17,453 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 560 transitions. [2020-07-21 16:11:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2020-07-21 16:11:17,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:11:17,461 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 55, 55, 44, 44, 31, 31, 31, 31, 31, 31, 31, 27, 27, 27, 27, 27, 27, 27, 18, 17, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:11:17,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:11:17,675 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:11:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:11:17,676 INFO L82 PathProgramCache]: Analyzing trace with hash 491568481, now seen corresponding path program 63 times [2020-07-21 16:11:17,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:11:17,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214581093] [2020-07-21 16:11:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:11:19,323 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:11:19,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:11:19,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:11:19,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:11:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18660 backedges. 351 proven. 2318 refuted. 0 times theorem prover too weak. 15991 trivial. 0 not checked. [2020-07-21 16:11:19,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:11:22,553 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:11:22,756 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:11:22,870 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:11:23,736 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 16:11:23,849 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 16:11:23,970 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 16:11:24,085 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 16:11:24,198 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 16:11:24,304 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 16:11:24,406 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 16:11:31,478 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:11:31,588 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:11:31,698 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:11:31,812 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:11:31,923 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 16:11:32,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:32,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:37,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:37,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:40,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:40,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:42,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:43,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:43,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:43,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:44,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:44,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:44,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:11:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18660 backedges. 351 proven. 2362 refuted. 0 times theorem prover too weak. 15947 trivial. 0 not checked. [2020-07-21 16:11:44,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214581093] [2020-07-21 16:11:44,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:11:44,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 16:11:44,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228160867] [2020-07-21 16:11:44,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 16:11:44,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:11:44,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 16:11:44,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:11:44,623 INFO L87 Difference]: Start difference. First operand 367 states and 560 transitions. Second operand 24 states. [2020-07-21 16:11:46,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:11:46,031 INFO L93 Difference]: Finished difference Result 374 states and 571 transitions. [2020-07-21 16:11:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 16:11:46,037 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 797 [2020-07-21 16:11:46,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:11:46,040 INFO L225 Difference]: With dead ends: 374 [2020-07-21 16:11:46,040 INFO L226 Difference]: Without dead ends: 370 [2020-07-21 16:11:46,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1602 GetRequests, 1553 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:11:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-07-21 16:11:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 367. [2020-07-21 16:11:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-07-21 16:11:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 560 transitions. [2020-07-21 16:11:46,064 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 560 transitions. Word has length 797 [2020-07-21 16:11:46,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:11:46,065 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 560 transitions. [2020-07-21 16:11:46,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 16:11:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 560 transitions. [2020-07-21 16:11:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1268 [2020-07-21 16:11:46,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:11:46,083 INFO L422 BasicCegarLoop]: trace histogram [102, 102, 85, 85, 70, 68, 51, 51, 51, 51, 51, 51, 51, 42, 42, 42, 42, 42, 42, 42, 34, 26, 19, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:11:46,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:11:46,298 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:11:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:11:46,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2095953516, now seen corresponding path program 64 times [2020-07-21 16:11:46,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:11:46,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163217544] [2020-07-21 16:11:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:11:48,024 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:11:48,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:11:48,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1883 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 16:11:48,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:11:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 48121 backedges. 2100 proven. 4918 refuted. 0 times theorem prover too weak. 41103 trivial. 0 not checked. [2020-07-21 16:11:49,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:11:52,277 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:11:55,754 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:11:59,430 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:12:07,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:07,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:11,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:11,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:12,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:12,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:13,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:13,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:14,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:14,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:14,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:17,795 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:12:22,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:23,220 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 16:12:25,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:27,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:27,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:28,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:28,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:28,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:28,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:28,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:29,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:12:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 48121 backedges. 2104 proven. 4962 refuted. 0 times theorem prover too weak. 41055 trivial. 0 not checked. [2020-07-21 16:12:29,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163217544] [2020-07-21 16:12:29,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:12:29,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 31] total 35 [2020-07-21 16:12:29,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037833821] [2020-07-21 16:12:29,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 16:12:29,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:12:29,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 16:12:29,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 16:12:29,857 INFO L87 Difference]: Start difference. First operand 367 states and 560 transitions. Second operand 35 states.