/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:34:10,816 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 00:34:10,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:34:10,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:34:10,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:34:10,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:34:10,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:34:10,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:34:10,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:34:10,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:34:10,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:34:10,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:34:10,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:34:10,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:34:10,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:34:10,930 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 00:34:10,955 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:34:10,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:34:10,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:34:10,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:34:10,961 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:34:10,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:34:10,961 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:34:10,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:34:10,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:34:10,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:34:10,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:34:10,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:34:10,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:34:10,965 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:34:10,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:34:10,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:34:10,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:34:10,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:34:10,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:34:10,967 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:34:10,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:34:10,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:34:10,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:34:10,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:34:10,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:34:10,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:34:10,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:10,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:34:10,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:34:10,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:34:11,342 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:34:11,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:34:11,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:34:11,364 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:34:11,364 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:34:11,365 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2020-07-21 00:34:11,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a3b5f1b7/c7681c13d92c4b05bd5baf888ae90a4d/FLAG6ccb1eacd [2020-07-21 00:34:11,996 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:34:11,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2020-07-21 00:34:12,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a3b5f1b7/c7681c13d92c4b05bd5baf888ae90a4d/FLAG6ccb1eacd [2020-07-21 00:34:12,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a3b5f1b7/c7681c13d92c4b05bd5baf888ae90a4d [2020-07-21 00:34:12,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:34:12,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:34:12,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:34:12,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:34:12,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:34:12,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:34:12" (1/1) ... [2020-07-21 00:34:12,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a47b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:34:12, skipping insertion in model container [2020-07-21 00:34:12,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:34:12" (1/1) ... [2020-07-21 00:34:12,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:34:12,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:34:12,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:34:12,546 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:34:12,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:34:12,584 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:34:12,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:34:12 WrapperNode [2020-07-21 00:34:12,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:34:12,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:34:12,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:34:12,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:34:12,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:34:12" (1/1) ... [2020-07-21 00:34:12,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:34:12" (1/1) ... [2020-07-21 00:34:12,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:34:12" (1/1) ... [2020-07-21 00:34:12,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:34:12" (1/1) ... [2020-07-21 00:34:12,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:34:12" (1/1) ... [2020-07-21 00:34:12,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:34:12" (1/1) ... [2020-07-21 00:34:12,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:34:12" (1/1) ... [2020-07-21 00:34:12,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:34:12,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:34:12,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:34:12,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:34:12,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:34:12" (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 00:34:12,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:34:12,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:34:12,795 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 00:34:12,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:34:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:34:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:34:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 00:34:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:34:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:34:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:34:13,013 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:34:13,014 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:34:13,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:34:13 BoogieIcfgContainer [2020-07-21 00:34:13,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:34:13,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:34:13,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:34:13,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:34:13,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:34:12" (1/3) ... [2020-07-21 00:34:13,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c5597b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:34:13, skipping insertion in model container [2020-07-21 00:34:13,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:34:12" (2/3) ... [2020-07-21 00:34:13,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c5597b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:34:13, skipping insertion in model container [2020-07-21 00:34:13,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:34:13" (3/3) ... [2020-07-21 00:34:13,036 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_10-2.c [2020-07-21 00:34:13,050 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:34:13,060 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:34:13,080 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:34:13,152 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:34:13,153 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:34:13,156 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:34:13,157 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:34:13,157 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:34:13,157 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:34:13,157 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:34:13,158 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:34:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 00:34:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:34:13,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:13,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:13,227 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:13,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:13,235 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 00:34:13,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:13,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268761710] [2020-07-21 00:34:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:13,318 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:34:13,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:13,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:34:13,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:13,418 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 00:34:13,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:34:13,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268761710] [2020-07-21 00:34:13,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:34:13,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:34:13,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704379527] [2020-07-21 00:34:13,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:34:13,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:13,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:34:13,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:34:13,444 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 00:34:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:13,571 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 00:34:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:34:13,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:34:13,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:13,586 INFO L225 Difference]: With dead ends: 35 [2020-07-21 00:34:13,586 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 00:34:13,591 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 00:34:13,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 00:34:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 00:34:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 00:34:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 00:34:13,656 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 00:34:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:13,657 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 00:34:13,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:34:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 00:34:13,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 00:34:13,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:13,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:13,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:13,878 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:13,879 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 00:34:13,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:13,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275079947] [2020-07-21 00:34:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:13,920 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:34:13,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:13,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:34:13,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:13,957 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 00:34:13,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:34:13,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275079947] [2020-07-21 00:34:13,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:34:13,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:34:13,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471029581] [2020-07-21 00:34:13,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:34:13,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:13,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:34:13,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:34:13,963 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 00:34:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:14,050 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 00:34:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:34:14,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 00:34:14,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:14,054 INFO L225 Difference]: With dead ends: 27 [2020-07-21 00:34:14,054 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 00:34:14,056 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 00:34:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 00:34:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 00:34:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 00:34:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 00:34:14,066 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 00:34:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:14,066 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 00:34:14,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:34:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 00:34:14,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 00:34:14,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:14,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:14,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:14,284 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:14,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 00:34:14,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:14,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518341085] [2020-07-21 00:34:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:34:14,324 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:34:14,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:14,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:34:14,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:34:14,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:14,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 00:34:14,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518341085] [2020-07-21 00:34:14,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:14,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 00:34:14,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641490506] [2020-07-21 00:34:14,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:34:14,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:14,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:34:14,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:34:14,670 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 00:34:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:14,821 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 00:34:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:34:14,822 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 00:34:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:14,824 INFO L225 Difference]: With dead ends: 32 [2020-07-21 00:34:14,824 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 00:34:14,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:34:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 00:34:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 00:34:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 00:34:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 00:34:14,837 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 00:34:14,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:14,837 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 00:34:14,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:34:14,837 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 00:34:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:34:14,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:14,839 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:15,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:15,053 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:15,054 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 00:34:15,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:15,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637889570] [2020-07-21 00:34:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:34:15,086 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:34:15,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:15,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:34:15,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 00:34:15,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:15,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 00:34:15,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637889570] [2020-07-21 00:34:15,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:15,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 00:34:15,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414746338] [2020-07-21 00:34:15,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:34:15,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:15,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:34:15,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:34:15,340 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 00:34:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:15,444 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 00:34:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:34:15,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 00:34:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:15,447 INFO L225 Difference]: With dead ends: 37 [2020-07-21 00:34:15,448 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 00:34:15,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:34:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 00:34:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 00:34:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 00:34:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 00:34:15,459 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 00:34:15,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:15,460 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 00:34:15,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:34:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 00:34:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 00:34:15,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:15,463 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:15,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:15,676 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:15,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:15,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 00:34:15,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:15,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961151952] [2020-07-21 00:34:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:34:15,727 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:34:15,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:34:15,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:34:15,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:16,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:16,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:16,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:16,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 00:34:16,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961151952] [2020-07-21 00:34:16,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:16,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 00:34:16,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266676555] [2020-07-21 00:34:16,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:34:16,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:16,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:34:16,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:34:16,184 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 00:34:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:16,387 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 00:34:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:34:16,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 00:34:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:16,392 INFO L225 Difference]: With dead ends: 42 [2020-07-21 00:34:16,392 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 00:34:16,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:34:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 00:34:16,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 00:34:16,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 00:34:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 00:34:16,405 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 00:34:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:16,406 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 00:34:16,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:34:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 00:34:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 00:34:16,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:16,409 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:16,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:16,623 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:16,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 00:34:16,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:16,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994421359] [2020-07-21 00:34:16,626 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:16,657 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:34:16,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:16,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:34:16,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 00:34:16,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:16,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:17,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:17,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 00:34:17,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994421359] [2020-07-21 00:34:17,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:17,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 00:34:17,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332074559] [2020-07-21 00:34:17,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:34:17,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:17,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:34:17,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:34:17,099 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 00:34:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:17,233 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 00:34:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:34:17,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 00:34:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:17,237 INFO L225 Difference]: With dead ends: 47 [2020-07-21 00:34:17,237 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 00:34:17,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:34:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 00:34:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 00:34:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 00:34:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 00:34:17,251 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 00:34:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:17,252 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 00:34:17,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:34:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 00:34:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 00:34:17,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:17,255 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:17,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:17,464 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:17,464 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 00:34:17,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:17,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481829055] [2020-07-21 00:34:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:17,504 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:34:17,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:17,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:34:17,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 00:34:17,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:18,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:18,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:18,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:18,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:18,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 00:34:18,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481829055] [2020-07-21 00:34:18,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:18,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 00:34:18,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006496115] [2020-07-21 00:34:18,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:34:18,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:18,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:34:18,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:34:18,342 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 00:34:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:18,552 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 00:34:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:34:18,553 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 00:34:18,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:18,558 INFO L225 Difference]: With dead ends: 52 [2020-07-21 00:34:18,558 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 00:34:18,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:34:18,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 00:34:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 00:34:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:34:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 00:34:18,592 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 00:34:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:18,593 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 00:34:18,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:34:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 00:34:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 00:34:18,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:18,596 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:18,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:18,812 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 00:34:18,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:18,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104964832] [2020-07-21 00:34:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:18,857 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:34:18,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:18,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:34:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-21 00:34:18,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:19,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:19,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:19,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:19,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-21 00:34:19,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104964832] [2020-07-21 00:34:19,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:19,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 00:34:19,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031900421] [2020-07-21 00:34:19,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:34:19,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:19,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:34:19,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:34:19,625 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 00:34:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:19,796 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 00:34:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:34:19,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-21 00:34:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:19,800 INFO L225 Difference]: With dead ends: 57 [2020-07-21 00:34:19,801 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 00:34:19,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:34:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 00:34:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 00:34:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:34:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 00:34:19,820 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 00:34:19,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:19,820 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 00:34:19,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:34:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 00:34:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 00:34:19,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:19,824 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:20,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:20,038 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:20,039 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 00:34:20,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:20,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739829003] [2020-07-21 00:34:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:20,102 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:34:20,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:34:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 00:34:20,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:21,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:21,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:21,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:21,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:21,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 00:34:21,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739829003] [2020-07-21 00:34:21,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:21,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 00:34:21,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079029783] [2020-07-21 00:34:21,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:34:21,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:21,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:34:21,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:34:21,523 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 00:34:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:21,941 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 00:34:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:34:21,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-21 00:34:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:21,946 INFO L225 Difference]: With dead ends: 62 [2020-07-21 00:34:21,946 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 00:34:21,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:34:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 00:34:21,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 00:34:21,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 00:34:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 00:34:21,965 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 00:34:21,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:21,966 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 00:34:21,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:34:21,966 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 00:34:21,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 00:34:21,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:21,970 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:22,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:22,185 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:22,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:22,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 00:34:22,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:22,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067318027] [2020-07-21 00:34:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:34:22,262 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:34:22,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:22,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:34:22,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-21 00:34:22,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:23,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:23,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:23,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:23,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:23,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:23,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-21 00:34:23,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067318027] [2020-07-21 00:34:23,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:23,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 00:34:23,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704327523] [2020-07-21 00:34:23,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:34:23,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:23,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:34:23,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:34:23,745 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 00:34:23,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:23,995 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 00:34:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:34:23,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-21 00:34:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:24,001 INFO L225 Difference]: With dead ends: 67 [2020-07-21 00:34:24,002 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 00:34:24,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:34:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 00:34:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 00:34:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 00:34:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 00:34:24,022 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-21 00:34:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:24,023 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 00:34:24,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:34:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 00:34:24,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 00:34:24,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:24,030 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:24,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:24,245 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:24,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:24,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-21 00:34:24,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:24,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120495392] [2020-07-21 00:34:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:24,359 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:34:24,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:24,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:34:24,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 00:34:24,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:25,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:26,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:26,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:26,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:26,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:26,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 00:34:26,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120495392] [2020-07-21 00:34:26,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:26,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 00:34:26,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362588703] [2020-07-21 00:34:26,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:34:26,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:26,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:34:26,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:34:26,868 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 00:34:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:27,212 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 00:34:27,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:34:27,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 00:34:27,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:27,219 INFO L225 Difference]: With dead ends: 72 [2020-07-21 00:34:27,220 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 00:34:27,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:34:27,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 00:34:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 00:34:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 00:34:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 00:34:27,248 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 00:34:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:27,249 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 00:34:27,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:34:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 00:34:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-07-21 00:34:27,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:27,256 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 35, 21, 21, 21, 21, 21, 21, 21, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:27,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:27,470 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:27,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:27,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1101007572, now seen corresponding path program 5 times [2020-07-21 00:34:27,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:27,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334923115] [2020-07-21 00:34:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:27,578 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:34:27,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:27,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:34:27,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1061 refuted. 0 times theorem prover too weak. 3827 trivial. 0 not checked. [2020-07-21 00:34:27,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:29,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:30,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:30,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:30,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:30,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:30,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1101 refuted. 0 times theorem prover too weak. 3787 trivial. 0 not checked. [2020-07-21 00:34:30,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334923115] [2020-07-21 00:34:30,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:30,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 00:34:30,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83063724] [2020-07-21 00:34:30,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:34:30,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:30,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:34:30,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:34:30,605 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 00:34:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:30,986 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 00:34:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:34:30,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 300 [2020-07-21 00:34:30,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:31,001 INFO L225 Difference]: With dead ends: 77 [2020-07-21 00:34:31,001 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 00:34:31,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 572 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:34:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 00:34:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 00:34:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 00:34:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 00:34:31,053 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 300 [2020-07-21 00:34:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:31,055 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 00:34:31,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:34:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 00:34:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-21 00:34:31,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:31,068 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 36, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:31,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:31,282 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:31,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:31,283 INFO L82 PathProgramCache]: Analyzing trace with hash -897924696, now seen corresponding path program 6 times [2020-07-21 00:34:31,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:31,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266756264] [2020-07-21 00:34:31,284 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:31,540 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:34:31,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:31,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:34:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12915 backedges. 306 proven. 1995 refuted. 0 times theorem prover too weak. 10614 trivial. 0 not checked. [2020-07-21 00:34:31,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:34,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:35,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:35,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:35,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:35,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:35,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:36,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:36,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12915 backedges. 306 proven. 2046 refuted. 0 times theorem prover too weak. 10563 trivial. 0 not checked. [2020-07-21 00:34:36,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266756264] [2020-07-21 00:34:36,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:36,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 00:34:36,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760858281] [2020-07-21 00:34:36,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:34:36,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:34:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:34:36,217 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 00:34:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:36,670 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 00:34:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:34:36,670 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 468 [2020-07-21 00:34:36,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:36,676 INFO L225 Difference]: With dead ends: 82 [2020-07-21 00:34:36,676 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 00:34:36,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 905 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:34:36,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 00:34:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 00:34:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 00:34:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 00:34:36,717 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 468 [2020-07-21 00:34:36,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:36,719 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 00:34:36,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:34:36,720 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 00:34:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 00:34:36,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:36,727 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:36,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:36,941 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:36,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-21 00:34:36,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:36,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751389052] [2020-07-21 00:34:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:34:37,096 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:34:37,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:37,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:34:37,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1918 refuted. 0 times theorem prover too weak. 9431 trivial. 0 not checked. [2020-07-21 00:34:37,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:39,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:40,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:40,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:40,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:40,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:41,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:41,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:41,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:41,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1975 refuted. 0 times theorem prover too weak. 9374 trivial. 0 not checked. [2020-07-21 00:34:41,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751389052] [2020-07-21 00:34:41,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:41,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 00:34:41,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749351098] [2020-07-21 00:34:41,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:34:41,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:41,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:34:41,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:34:41,454 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 00:34:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:42,170 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 00:34:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:34:42,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-21 00:34:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:42,178 INFO L225 Difference]: With dead ends: 87 [2020-07-21 00:34:42,178 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 00:34:42,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 00:34:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 00:34:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 00:34:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 00:34:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 00:34:42,204 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 450 [2020-07-21 00:34:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:42,206 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 00:34:42,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:34:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 00:34:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 00:34:42,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:42,223 INFO L422 BasicCegarLoop]: trace histogram [133, 133, 67, 66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:42,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:42,433 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:42,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:42,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1701713687, now seen corresponding path program 7 times [2020-07-21 00:34:42,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:42,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663763710] [2020-07-21 00:34:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:34:42,738 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:34:42,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:42,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:34:42,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 778 proven. 4406 refuted. 0 times theorem prover too weak. 40653 trivial. 0 not checked. [2020-07-21 00:34:43,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:46,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:46,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:48,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:49,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:49,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:49,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:49,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:49,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:49,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:50,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:50,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:50,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 778 proven. 4476 refuted. 0 times theorem prover too weak. 40583 trivial. 0 not checked. [2020-07-21 00:34:50,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663763710] [2020-07-21 00:34:50,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:50,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 00:34:50,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269913098] [2020-07-21 00:34:50,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:34:50,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:50,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:34:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:34:50,730 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 00:34:51,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:51,363 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 00:34:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:34:51,364 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 871 [2020-07-21 00:34:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:51,371 INFO L225 Difference]: With dead ends: 92 [2020-07-21 00:34:51,371 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 00:34:51,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 1707 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:34:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 00:34:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 00:34:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 00:34:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 00:34:51,408 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 871 [2020-07-21 00:34:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:51,411 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 00:34:51,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:34:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 00:34:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1229 [2020-07-21 00:34:51,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:34:51,436 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 147, 89, 89, 89, 89, 89, 89, 89, 58, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:34:51,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:51,651 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:34:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:34:51,652 INFO L82 PathProgramCache]: Analyzing trace with hash 104339052, now seen corresponding path program 7 times [2020-07-21 00:34:51,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:34:51,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830389085] [2020-07-21 00:34:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:51,966 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:34:51,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:34:51,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:34:51,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:34:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 90119 backedges. 893 proven. 6738 refuted. 0 times theorem prover too weak. 82488 trivial. 0 not checked. [2020-07-21 00:34:52,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:34:57,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:57,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:34:59,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:00,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:00,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:00,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:00,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:00,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:00,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:01,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 90119 backedges. 893 proven. 6815 refuted. 0 times theorem prover too weak. 82411 trivial. 0 not checked. [2020-07-21 00:35:02,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830389085] [2020-07-21 00:35:02,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:35:02,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 00:35:02,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966328576] [2020-07-21 00:35:02,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:35:02,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:02,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:35:02,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:35:02,180 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 21 states. [2020-07-21 00:35:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:03,000 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 00:35:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:35:03,001 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1228 [2020-07-21 00:35:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:03,009 INFO L225 Difference]: With dead ends: 97 [2020-07-21 00:35:03,009 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 00:35:03,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2463 GetRequests, 2420 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:35:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 00:35:03,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 00:35:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 00:35:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 00:35:03,043 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1228 [2020-07-21 00:35:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:03,045 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 00:35:03,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:35:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 00:35:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1951 [2020-07-21 00:35:03,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:03,084 INFO L422 BasicCegarLoop]: trace histogram [299, 299, 150, 149, 149, 149, 149, 149, 149, 149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:03,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:03,299 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:03,300 INFO L82 PathProgramCache]: Analyzing trace with hash 621098440, now seen corresponding path program 8 times [2020-07-21 00:35:03,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:03,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31123693] [2020-07-21 00:35:03,302 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:35:03,748 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:35:03,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:03,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:35:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1708 proven. 11918 refuted. 0 times theorem prover too weak. 219708 trivial. 0 not checked. [2020-07-21 00:35:05,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:13,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:15,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:17,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:18,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:18,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:19,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:19,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:19,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:19,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:19,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:19,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:19,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1708 proven. 12010 refuted. 0 times theorem prover too weak. 219616 trivial. 0 not checked. [2020-07-21 00:35:21,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31123693] [2020-07-21 00:35:21,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:35:21,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 00:35:21,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760851394] [2020-07-21 00:35:21,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 00:35:21,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:21,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 00:35:21,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:35:21,163 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 23 states. [2020-07-21 00:35:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:21,801 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 00:35:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:35:21,802 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1950 [2020-07-21 00:35:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:21,811 INFO L225 Difference]: With dead ends: 102 [2020-07-21 00:35:21,811 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 00:35:21,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3909 GetRequests, 3861 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 00:35:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 00:35:21,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 00:35:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 00:35:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 00:35:21,833 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1950 [2020-07-21 00:35:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:21,837 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 00:35:21,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 00:35:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 00:35:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1690 [2020-07-21 00:35:21,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:21,867 INFO L422 BasicCegarLoop]: trace histogram [245, 245, 212, 122, 122, 122, 122, 122, 122, 122, 90, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:22,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:22,083 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:22,084 INFO L82 PathProgramCache]: Analyzing trace with hash 249367267, now seen corresponding path program 8 times [2020-07-21 00:35:22,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:22,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312973157] [2020-07-21 00:35:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:22,509 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:35:22,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:22,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:35:22,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1545 proven. 10458 refuted. 0 times theorem prover too weak. 159447 trivial. 0 not checked. [2020-07-21 00:35:24,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:30,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:33,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:33,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:35,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:35,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:35,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:36,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:36,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:36,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:36,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:36,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:35:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1545 proven. 10558 refuted. 0 times theorem prover too weak. 159347 trivial. 0 not checked. [2020-07-21 00:35:38,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312973157] [2020-07-21 00:35:38,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:35:38,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:35:38,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317745341] [2020-07-21 00:35:38,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:35:38,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:35:38,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:35:38,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:35:38,064 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 22 states. [2020-07-21 00:35:38,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:35:38,706 INFO L93 Difference]: Finished difference Result 107 states and 432 transitions. [2020-07-21 00:35:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:35:38,707 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1689 [2020-07-21 00:35:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:35:38,716 INFO L225 Difference]: With dead ends: 107 [2020-07-21 00:35:38,717 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 00:35:38,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3386 GetRequests, 3338 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:35:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 00:35:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-07-21 00:35:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 00:35:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 00:35:38,738 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1689 [2020-07-21 00:35:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:35:38,741 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 00:35:38,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:35:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 00:35:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2939 [2020-07-21 00:35:38,831 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:35:38,832 INFO L422 BasicCegarLoop]: trace histogram [451, 451, 226, 225, 225, 225, 225, 225, 225, 225, 225, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:35:39,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:39,047 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:35:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:35:39,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1181276374, now seen corresponding path program 9 times [2020-07-21 00:35:39,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:35:39,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535901208] [2020-07-21 00:35:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:35:39,694 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:35:39,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:35:39,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:35:39,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:35:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 531900 backedges. 2556 proven. 20592 refuted. 0 times theorem prover too weak. 508752 trivial. 0 not checked. [2020-07-21 00:35:44,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:35:55,922 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:35:57,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:02,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:04,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:06,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:06,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:07,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:07,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:07,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:07,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:07,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:08,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:08,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 531900 backedges. 2556 proven. 20709 refuted. 0 times theorem prover too weak. 508635 trivial. 0 not checked. [2020-07-21 00:36:11,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535901208] [2020-07-21 00:36:11,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:36:11,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 00:36:11,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236445908] [2020-07-21 00:36:11,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:36:11,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:11,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:36:11,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:36:11,498 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 24 states. [2020-07-21 00:36:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:12,589 INFO L93 Difference]: Finished difference Result 112 states and 474 transitions. [2020-07-21 00:36:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:36:12,592 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 2938 [2020-07-21 00:36:12,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:12,601 INFO L225 Difference]: With dead ends: 112 [2020-07-21 00:36:12,601 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 00:36:12,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5886 GetRequests, 5833 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 00:36:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 00:36:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-07-21 00:36:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 00:36:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 00:36:12,626 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2938 [2020-07-21 00:36:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:12,629 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 00:36:12,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:36:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 00:36:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3217 [2020-07-21 00:36:12,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:36:12,734 INFO L422 BasicCegarLoop]: trace histogram [471, 471, 383, 235, 235, 235, 235, 235, 235, 235, 148, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:36:12,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:12,948 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:36:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:36:12,950 INFO L82 PathProgramCache]: Analyzing trace with hash 369481932, now seen corresponding path program 9 times [2020-07-21 00:36:12,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:36:12,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765405326] [2020-07-21 00:36:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:13,664 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:36:13,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:36:13,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:36:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:36:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 625873 backedges. 3131 proven. 23672 refuted. 0 times theorem prover too weak. 599070 trivial. 0 not checked. [2020-07-21 00:36:17,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:36:33,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:39,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:39,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:41,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:43,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:44,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:44,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:44,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:44,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:44,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:44,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:45,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:36:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 625873 backedges. 3141 proven. 23779 refuted. 0 times theorem prover too weak. 598953 trivial. 0 not checked. [2020-07-21 00:36:49,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765405326] [2020-07-21 00:36:49,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:36:49,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 00:36:49,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103259287] [2020-07-21 00:36:49,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:36:49,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:36:49,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:36:49,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:36:49,294 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 24 states. [2020-07-21 00:36:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:36:50,288 INFO L93 Difference]: Finished difference Result 289 states and 3051 transitions. [2020-07-21 00:36:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:36:50,291 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 3216 [2020-07-21 00:36:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:36:50,310 INFO L225 Difference]: With dead ends: 289 [2020-07-21 00:36:50,311 INFO L226 Difference]: Without dead ends: 85 [2020-07-21 00:36:50,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6441 GetRequests, 6388 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 00:36:50,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-21 00:36:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-07-21 00:36:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 00:36:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 140 transitions. [2020-07-21 00:36:50,374 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 140 transitions. Word has length 3216 [2020-07-21 00:36:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:36:50,377 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 140 transitions. [2020-07-21 00:36:50,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:36:50,377 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 140 transitions. [2020-07-21 00:36:50,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1489 [2020-07-21 00:36:50,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:36:50,419 INFO L422 BasicCegarLoop]: trace histogram [215, 215, 191, 107, 107, 107, 107, 107, 107, 107, 84, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:36:50,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:36:50,635 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:36:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:36:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash 114559272, now seen corresponding path program 10 times [2020-07-21 00:36:50,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:36:50,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822428094] [2020-07-21 00:36:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:36:51,193 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:36:51,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:36:51,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:36:51,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:36:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 132849 backedges. 1654 proven. 8876 refuted. 0 times theorem prover too weak. 122319 trivial. 0 not checked. [2020-07-21 00:36:52,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:36:59,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:02,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:04,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:05,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:05,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:05,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:06,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:06,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:06,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:06,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:06,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:06,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:06,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:06,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:37:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 132849 backedges. 1678 proven. 8946 refuted. 0 times theorem prover too weak. 122225 trivial. 0 not checked. [2020-07-21 00:37:07,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822428094] [2020-07-21 00:37:07,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:37:07,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:37:07,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337605641] [2020-07-21 00:37:07,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:37:07,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:37:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:37:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:37:07,582 INFO L87 Difference]: Start difference. First operand 85 states and 140 transitions. Second operand 22 states. [2020-07-21 00:37:08,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:37:08,255 INFO L93 Difference]: Finished difference Result 294 states and 697 transitions. [2020-07-21 00:37:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:37:08,257 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1488 [2020-07-21 00:37:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:37:08,263 INFO L225 Difference]: With dead ends: 294 [2020-07-21 00:37:08,264 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 00:37:08,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2984 GetRequests, 2936 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:37:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 00:37:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-07-21 00:37:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 00:37:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 117 transitions. [2020-07-21 00:37:08,310 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 117 transitions. Word has length 1488 [2020-07-21 00:37:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:37:08,312 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 117 transitions. [2020-07-21 00:37:08,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:37:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 117 transitions. [2020-07-21 00:37:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2020-07-21 00:37:08,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:37:08,338 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:37:08,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:37:08,554 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:37:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:37:08,555 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 11 times [2020-07-21 00:37:08,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:37:08,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831101497] [2020-07-21 00:37:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:37:09,422 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:37:09,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:37:09,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 711 conjunts are in the unsatisfiable core [2020-07-21 00:37:09,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:37:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2020-07-21 00:37:12,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:37:41,723 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 00:37:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2020-07-21 00:37:48,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831101497] [2020-07-21 00:37:48,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:37:48,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2020-07-21 00:37:48,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878055442] [2020-07-21 00:37:48,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-21 00:37:48,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:37:48,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-21 00:37:48,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 00:37:48,031 INFO L87 Difference]: Start difference. First operand 82 states and 117 transitions. Second operand 40 states. [2020-07-21 00:37:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:37:50,224 INFO L93 Difference]: Finished difference Result 173 states and 302 transitions. [2020-07-21 00:37:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 00:37:50,228 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2020-07-21 00:37:50,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:37:50,236 INFO L225 Difference]: With dead ends: 173 [2020-07-21 00:37:50,236 INFO L226 Difference]: Without dead ends: 166 [2020-07-21 00:37:50,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2425 GetRequests, 2339 SyntacticMatches, 46 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=103, Invalid=1619, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 00:37:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-21 00:37:50,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2020-07-21 00:37:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 00:37:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 245 transitions. [2020-07-21 00:37:50,278 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 245 transitions. Word has length 1212 [2020-07-21 00:37:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:37:50,279 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 245 transitions. [2020-07-21 00:37:50,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-21 00:37:50,280 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 245 transitions. [2020-07-21 00:37:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1414 [2020-07-21 00:37:50,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:37:50,309 INFO L422 BasicCegarLoop]: trace histogram [209, 209, 152, 104, 104, 104, 104, 104, 104, 104, 57, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:37:50,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:37:50,524 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:37:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:37:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1928433851, now seen corresponding path program 12 times [2020-07-21 00:37:50,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:37:50,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839513360] [2020-07-21 00:37:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:37:51,166 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:37:51,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:37:51,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:37:51,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:37:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 119844 backedges. 1706 proven. 9311 refuted. 0 times theorem prover too weak. 108827 trivial. 0 not checked. [2020-07-21 00:37:52,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:38:01,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:01,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:04,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:04,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:06,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:06,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:08,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:08,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:09,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:09,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:09,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:09,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:10,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:10,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:10,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:10,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:10,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 119844 backedges. 1718 proven. 9416 refuted. 0 times theorem prover too weak. 108710 trivial. 0 not checked. [2020-07-21 00:38:11,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839513360] [2020-07-21 00:38:11,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:38:11,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 00:38:11,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381020070] [2020-07-21 00:38:11,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:38:11,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:38:11,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:38:11,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:38:11,551 INFO L87 Difference]: Start difference. First operand 137 states and 245 transitions. Second operand 24 states. [2020-07-21 00:38:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:38:12,796 INFO L93 Difference]: Finished difference Result 401 states and 971 transitions. [2020-07-21 00:38:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:38:12,798 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1413 [2020-07-21 00:38:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:38:12,812 INFO L225 Difference]: With dead ends: 401 [2020-07-21 00:38:12,812 INFO L226 Difference]: Without dead ends: 137 [2020-07-21 00:38:12,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2835 GetRequests, 2782 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 00:38:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-21 00:38:12,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2020-07-21 00:38:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 00:38:12,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 215 transitions. [2020-07-21 00:38:12,892 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 215 transitions. Word has length 1413 [2020-07-21 00:38:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:38:12,894 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 215 transitions. [2020-07-21 00:38:12,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:38:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 215 transitions. [2020-07-21 00:38:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1333 [2020-07-21 00:38:12,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:38:12,929 INFO L422 BasicCegarLoop]: trace histogram [197, 197, 143, 98, 98, 98, 98, 98, 98, 98, 54, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:38:13,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:38:13,144 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:38:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:38:13,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1027681353, now seen corresponding path program 13 times [2020-07-21 00:38:13,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:38:13,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93441880] [2020-07-21 00:38:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:38:13,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:38:13,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:38:13,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 00:38:13,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:38:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 106389 backedges. 1581 proven. 8101 refuted. 0 times theorem prover too weak. 96707 trivial. 0 not checked. [2020-07-21 00:38:15,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:38:24,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:28,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:30,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:32,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:32,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:33,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:33,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:33,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:33,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:33,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:33,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:34,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 106389 backedges. 1585 proven. 8189 refuted. 0 times theorem prover too weak. 96615 trivial. 0 not checked. [2020-07-21 00:38:34,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93441880] [2020-07-21 00:38:34,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:38:34,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 00:38:34,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136289051] [2020-07-21 00:38:34,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:38:34,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:38:34,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:38:34,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:38:34,921 INFO L87 Difference]: Start difference. First operand 131 states and 215 transitions. Second operand 24 states. [2020-07-21 00:38:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:38:35,957 INFO L93 Difference]: Finished difference Result 332 states and 687 transitions. [2020-07-21 00:38:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:38:35,960 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1332 [2020-07-21 00:38:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:38:35,967 INFO L225 Difference]: With dead ends: 332 [2020-07-21 00:38:35,968 INFO L226 Difference]: Without dead ends: 131 [2020-07-21 00:38:35,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2672 GetRequests, 2622 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:38:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-21 00:38:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-07-21 00:38:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 00:38:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 203 transitions. [2020-07-21 00:38:36,014 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 203 transitions. Word has length 1332 [2020-07-21 00:38:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:38:36,015 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 203 transitions. [2020-07-21 00:38:36,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:38:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 203 transitions. [2020-07-21 00:38:36,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1239 [2020-07-21 00:38:36,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:38:36,044 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 145, 90, 90, 90, 90, 90, 90, 90, 55, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:38:36,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:38:36,258 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:38:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:38:36,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1508018689, now seen corresponding path program 14 times [2020-07-21 00:38:36,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:38:36,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240750472] [2020-07-21 00:38:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:38:36,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:38:36,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:38:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:38:37,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:38:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 91620 backedges. 1699 proven. 6955 refuted. 0 times theorem prover too weak. 82966 trivial. 0 not checked. [2020-07-21 00:38:37,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:38:40,923 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:38:47,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:50,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:52,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:53,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:53,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:54,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:54,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:54,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:54,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:54,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:55,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:55,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:55,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:38:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 91620 backedges. 1719 proven. 7029 refuted. 0 times theorem prover too weak. 82872 trivial. 0 not checked. [2020-07-21 00:38:56,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240750472] [2020-07-21 00:38:56,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:38:56,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:38:56,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354465719] [2020-07-21 00:38:56,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:38:56,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:38:56,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:38:56,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:38:56,379 INFO L87 Difference]: Start difference. First operand 131 states and 203 transitions. Second operand 22 states. [2020-07-21 00:38:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:38:57,132 INFO L93 Difference]: Finished difference Result 182 states and 284 transitions. [2020-07-21 00:38:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:38:57,135 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1238 [2020-07-21 00:38:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:38:57,139 INFO L225 Difference]: With dead ends: 182 [2020-07-21 00:38:57,140 INFO L226 Difference]: Without dead ends: 155 [2020-07-21 00:38:57,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2484 GetRequests, 2436 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:38:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-21 00:38:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2020-07-21 00:38:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-21 00:38:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 224 transitions. [2020-07-21 00:38:57,177 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 224 transitions. Word has length 1238 [2020-07-21 00:38:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:38:57,177 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 224 transitions. [2020-07-21 00:38:57,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:38:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 224 transitions. [2020-07-21 00:38:57,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1261 [2020-07-21 00:38:57,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:38:57,208 INFO L422 BasicCegarLoop]: trace histogram [185, 185, 143, 92, 92, 92, 92, 92, 92, 92, 51, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:38:57,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:38:57,423 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:38:57,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:38:57,424 INFO L82 PathProgramCache]: Analyzing trace with hash -873522537, now seen corresponding path program 15 times [2020-07-21 00:38:57,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:38:57,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115779878] [2020-07-21 00:38:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:38:58,180 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:38:58,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:38:58,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 00:38:58,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:38:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 94977 backedges. 1581 proven. 7561 refuted. 0 times theorem prover too weak. 85835 trivial. 0 not checked. [2020-07-21 00:38:59,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:39:09,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:13,670 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-07-21 00:39:13,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:16,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:17,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:17,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:18,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:18,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:18,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:18,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:19,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:19,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:19,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 94977 backedges. 1583 proven. 7651 refuted. 0 times theorem prover too weak. 85743 trivial. 0 not checked. [2020-07-21 00:39:20,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115779878] [2020-07-21 00:39:20,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:39:20,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 00:39:20,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617671356] [2020-07-21 00:39:20,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:39:20,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:39:20,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:39:20,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:39:20,365 INFO L87 Difference]: Start difference. First operand 144 states and 224 transitions. Second operand 24 states. [2020-07-21 00:39:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:39:21,225 INFO L93 Difference]: Finished difference Result 185 states and 286 transitions. [2020-07-21 00:39:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:39:21,227 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1260 [2020-07-21 00:39:21,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:39:21,234 INFO L225 Difference]: With dead ends: 185 [2020-07-21 00:39:21,235 INFO L226 Difference]: Without dead ends: 153 [2020-07-21 00:39:21,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2528 GetRequests, 2478 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:39:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-21 00:39:21,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 136. [2020-07-21 00:39:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 00:39:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 210 transitions. [2020-07-21 00:39:21,269 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 210 transitions. Word has length 1260 [2020-07-21 00:39:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:39:21,271 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 210 transitions. [2020-07-21 00:39:21,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:39:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 210 transitions. [2020-07-21 00:39:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1226 [2020-07-21 00:39:21,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:39:21,299 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 144, 89, 89, 89, 89, 89, 89, 89, 55, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:39:21,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:39:21,514 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:39:21,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:39:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash -880609700, now seen corresponding path program 16 times [2020-07-21 00:39:21,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:39:21,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619540809] [2020-07-21 00:39:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:39:22,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:39:22,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:39:22,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:39:22,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:39:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 89684 backedges. 3351 proven. 3627 refuted. 0 times theorem prover too weak. 82706 trivial. 0 not checked. [2020-07-21 00:39:23,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:39:30,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:31,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:32,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:32,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:33,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:33,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:33,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:33,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:33,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:33,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:33,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:34,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 89684 backedges. 3357 proven. 3678 refuted. 0 times theorem prover too weak. 82649 trivial. 0 not checked. [2020-07-21 00:39:37,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619540809] [2020-07-21 00:39:37,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:39:37,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 00:39:37,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429402752] [2020-07-21 00:39:37,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:39:37,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:39:37,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:39:37,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:39:37,675 INFO L87 Difference]: Start difference. First operand 136 states and 210 transitions. Second operand 20 states. [2020-07-21 00:39:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:39:38,250 INFO L93 Difference]: Finished difference Result 209 states and 321 transitions. [2020-07-21 00:39:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:39:38,253 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1225 [2020-07-21 00:39:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:39:38,262 INFO L225 Difference]: With dead ends: 209 [2020-07-21 00:39:38,263 INFO L226 Difference]: Without dead ends: 192 [2020-07-21 00:39:38,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2456 GetRequests, 2416 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:39:38,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-21 00:39:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 168. [2020-07-21 00:39:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-21 00:39:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 262 transitions. [2020-07-21 00:39:38,317 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 262 transitions. Word has length 1225 [2020-07-21 00:39:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:39:38,320 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 262 transitions. [2020-07-21 00:39:38,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:39:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 262 transitions. [2020-07-21 00:39:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2020-07-21 00:39:38,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:39:38,354 INFO L422 BasicCegarLoop]: trace histogram [185, 185, 146, 92, 92, 92, 92, 92, 92, 92, 54, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:39:38,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:39:38,571 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:39:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:39:38,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1762427129, now seen corresponding path program 17 times [2020-07-21 00:39:38,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:39:38,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806252319] [2020-07-21 00:39:38,574 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:39:39,338 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:39:39,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:39:39,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:39:39,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:39:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 95409 backedges. 2045 proven. 6790 refuted. 0 times theorem prover too weak. 86574 trivial. 0 not checked. [2020-07-21 00:39:40,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:39:49,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:52,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:55,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:56,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:56,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:56,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:57,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:57,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:57,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:57,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:57,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:57,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:57,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:39:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 95409 backedges. 2063 proven. 6866 refuted. 0 times theorem prover too weak. 86480 trivial. 0 not checked. [2020-07-21 00:39:59,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806252319] [2020-07-21 00:39:59,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:39:59,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:39:59,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296811793] [2020-07-21 00:39:59,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:39:59,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:39:59,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:39:59,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:39:59,215 INFO L87 Difference]: Start difference. First operand 168 states and 262 transitions. Second operand 22 states. [2020-07-21 00:40:00,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:40:00,134 INFO L93 Difference]: Finished difference Result 222 states and 350 transitions. [2020-07-21 00:40:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:40:00,137 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1263 [2020-07-21 00:40:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:40:00,145 INFO L225 Difference]: With dead ends: 222 [2020-07-21 00:40:00,146 INFO L226 Difference]: Without dead ends: 197 [2020-07-21 00:40:00,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2534 GetRequests, 2486 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:40:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-07-21 00:40:00,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 173. [2020-07-21 00:40:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 00:40:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 272 transitions. [2020-07-21 00:40:00,194 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 272 transitions. Word has length 1263 [2020-07-21 00:40:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:40:00,196 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 272 transitions. [2020-07-21 00:40:00,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:40:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 272 transitions. [2020-07-21 00:40:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1289 [2020-07-21 00:40:00,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:40:00,233 INFO L422 BasicCegarLoop]: trace histogram [189, 189, 147, 94, 94, 94, 94, 94, 94, 94, 53, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:40:00,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:40:00,447 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:40:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:40:00,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2146677285, now seen corresponding path program 18 times [2020-07-21 00:40:00,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:40:00,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039231010] [2020-07-21 00:40:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:40:01,270 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:40:01,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:40:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:40:01,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:40:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 99279 backedges. 1759 proven. 7257 refuted. 0 times theorem prover too weak. 90263 trivial. 0 not checked. [2020-07-21 00:40:02,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:40:12,138 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:40:12,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:12,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:16,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:16,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:18,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:20,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:20,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:21,090 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 00:40:21,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:21,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:21,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:21,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:21,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:21,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:21,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:21,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 99279 backedges. 1777 proven. 7333 refuted. 0 times theorem prover too weak. 90169 trivial. 0 not checked. [2020-07-21 00:40:22,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039231010] [2020-07-21 00:40:22,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:40:22,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:40:22,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692977560] [2020-07-21 00:40:22,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:40:22,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:40:22,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:40:22,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:40:22,813 INFO L87 Difference]: Start difference. First operand 173 states and 272 transitions. Second operand 22 states. [2020-07-21 00:40:23,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:40:23,645 INFO L93 Difference]: Finished difference Result 244 states and 387 transitions. [2020-07-21 00:40:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:40:23,649 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1288 [2020-07-21 00:40:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:40:23,654 INFO L225 Difference]: With dead ends: 244 [2020-07-21 00:40:23,654 INFO L226 Difference]: Without dead ends: 197 [2020-07-21 00:40:23,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2584 GetRequests, 2536 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:40:23,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-07-21 00:40:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 173. [2020-07-21 00:40:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 00:40:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 270 transitions. [2020-07-21 00:40:23,696 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 270 transitions. Word has length 1288 [2020-07-21 00:40:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:40:23,697 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 270 transitions. [2020-07-21 00:40:23,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:40:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 270 transitions. [2020-07-21 00:40:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1273 [2020-07-21 00:40:23,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:40:23,731 INFO L422 BasicCegarLoop]: trace histogram [187, 187, 143, 93, 93, 93, 93, 93, 93, 93, 50, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:40:23,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:40:23,944 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:40:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:40:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash -150171358, now seen corresponding path program 19 times [2020-07-21 00:40:23,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:40:23,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341556596] [2020-07-21 00:40:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:40:24,794 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:40:24,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:40:24,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:40:24,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:40:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 96829 backedges. 1665 proven. 6583 refuted. 0 times theorem prover too weak. 88581 trivial. 0 not checked. [2020-07-21 00:40:25,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:40:29,167 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-07-21 00:40:35,947 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:40:36,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:36,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:39,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:39,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:42,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:42,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:43,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:43,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:44,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:44,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:44,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:44,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:44,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:44,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 96829 backedges. 1676 proven. 6644 refuted. 0 times theorem prover too weak. 88509 trivial. 0 not checked. [2020-07-21 00:40:45,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341556596] [2020-07-21 00:40:45,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:40:45,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:40:45,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604638814] [2020-07-21 00:40:45,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:40:45,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:40:45,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:40:45,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:40:45,533 INFO L87 Difference]: Start difference. First operand 173 states and 270 transitions. Second operand 22 states. [2020-07-21 00:40:46,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:40:46,337 INFO L93 Difference]: Finished difference Result 216 states and 334 transitions. [2020-07-21 00:40:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:40:46,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1272 [2020-07-21 00:40:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:40:46,346 INFO L225 Difference]: With dead ends: 216 [2020-07-21 00:40:46,347 INFO L226 Difference]: Without dead ends: 189 [2020-07-21 00:40:46,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2551 GetRequests, 2506 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:40:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-07-21 00:40:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 157. [2020-07-21 00:40:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-21 00:40:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 244 transitions. [2020-07-21 00:40:46,383 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 244 transitions. Word has length 1272 [2020-07-21 00:40:46,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:40:46,384 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 244 transitions. [2020-07-21 00:40:46,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:40:46,384 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 244 transitions. [2020-07-21 00:40:46,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1263 [2020-07-21 00:40:46,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:40:46,414 INFO L422 BasicCegarLoop]: trace histogram [185, 185, 145, 92, 92, 92, 92, 92, 92, 92, 53, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:40:46,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:40:46,629 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:40:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:40:46,630 INFO L82 PathProgramCache]: Analyzing trace with hash -110795933, now seen corresponding path program 20 times [2020-07-21 00:40:46,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:40:46,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654019664] [2020-07-21 00:40:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:40:47,519 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:40:47,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:40:47,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:40:47,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:40:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 95264 backedges. 1941 proven. 6243 refuted. 0 times theorem prover too weak. 87080 trivial. 0 not checked. [2020-07-21 00:40:48,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:40:50,742 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:40:51,092 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 00:40:59,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:40:59,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:03,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:03,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:05,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:05,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:06,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:06,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:06,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:06,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:07,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:07,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:07,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 95264 backedges. 1950 proven. 6306 refuted. 0 times theorem prover too weak. 87008 trivial. 0 not checked. [2020-07-21 00:41:08,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654019664] [2020-07-21 00:41:08,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:41:08,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:41:08,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556765777] [2020-07-21 00:41:08,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:41:08,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:41:08,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:41:08,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:41:08,920 INFO L87 Difference]: Start difference. First operand 157 states and 244 transitions. Second operand 22 states. [2020-07-21 00:41:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:41:09,822 INFO L93 Difference]: Finished difference Result 246 states and 396 transitions. [2020-07-21 00:41:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:41:09,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1262 [2020-07-21 00:41:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:41:09,833 INFO L225 Difference]: With dead ends: 246 [2020-07-21 00:41:09,833 INFO L226 Difference]: Without dead ends: 209 [2020-07-21 00:41:09,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2531 GetRequests, 2486 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:41:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-21 00:41:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 154. [2020-07-21 00:41:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 00:41:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 242 transitions. [2020-07-21 00:41:09,883 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 242 transitions. Word has length 1262 [2020-07-21 00:41:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:41:09,884 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 242 transitions. [2020-07-21 00:41:09,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:41:09,884 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 242 transitions. [2020-07-21 00:41:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1262 [2020-07-21 00:41:09,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:41:09,914 INFO L422 BasicCegarLoop]: trace histogram [185, 185, 144, 92, 92, 92, 92, 92, 92, 92, 52, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:41:10,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:41:10,130 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:41:10,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:41:10,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1199871375, now seen corresponding path program 21 times [2020-07-21 00:41:10,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:41:10,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492948698] [2020-07-21 00:41:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:41:11,051 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:41:11,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:41:11,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 00:41:11,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:41:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 95120 backedges. 1775 proven. 7376 refuted. 0 times theorem prover too weak. 85969 trivial. 0 not checked. [2020-07-21 00:41:12,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:41:15,658 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:41:15,764 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:41:15,872 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:41:16,225 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-07-21 00:41:24,056 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:41:24,163 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 00:41:24,410 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-07-21 00:41:24,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:24,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:30,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:30,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:33,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:33,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:35,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:35,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:36,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:36,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:36,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:36,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:36,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:36,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:37,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 95120 backedges. 1775 proven. 7468 refuted. 0 times theorem prover too weak. 85877 trivial. 0 not checked. [2020-07-21 00:41:38,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492948698] [2020-07-21 00:41:38,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:41:38,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 00:41:38,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966011898] [2020-07-21 00:41:38,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:41:38,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:41:38,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:41:38,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:41:38,343 INFO L87 Difference]: Start difference. First operand 154 states and 242 transitions. Second operand 24 states. [2020-07-21 00:41:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:41:39,289 INFO L93 Difference]: Finished difference Result 247 states and 393 transitions. [2020-07-21 00:41:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:41:39,294 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1261 [2020-07-21 00:41:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:41:39,300 INFO L225 Difference]: With dead ends: 247 [2020-07-21 00:41:39,301 INFO L226 Difference]: Without dead ends: 200 [2020-07-21 00:41:39,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2530 GetRequests, 2480 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:41:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-21 00:41:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2020-07-21 00:41:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-21 00:41:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 249 transitions. [2020-07-21 00:41:39,335 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 249 transitions. Word has length 1261 [2020-07-21 00:41:39,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:41:39,336 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 249 transitions. [2020-07-21 00:41:39,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:41:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 249 transitions. [2020-07-21 00:41:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1252 [2020-07-21 00:41:39,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:41:39,359 INFO L422 BasicCegarLoop]: trace histogram [183, 183, 146, 91, 91, 91, 91, 91, 91, 91, 55, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:41:39,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:41:39,573 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:41:39,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:41:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2001155728, now seen corresponding path program 22 times [2020-07-21 00:41:39,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:41:39,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055098937] [2020-07-21 00:41:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:41:40,475 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:41:40,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:41:40,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 00:41:40,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:41:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 93577 backedges. 2081 proven. 6998 refuted. 0 times theorem prover too weak. 84498 trivial. 0 not checked. [2020-07-21 00:41:41,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:41:45,142 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:41:45,338 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:41:45,448 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:41:45,556 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 00:41:45,974 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-07-21 00:41:53,663 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-21 00:41:53,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:53,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:41:58,334 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-07-21 00:41:58,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:02,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:02,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:03,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:03,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:04,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:04,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:05,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:05,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:05,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:06,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:06,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 93577 backedges. 2079 proven. 7092 refuted. 0 times theorem prover too weak. 84406 trivial. 0 not checked. [2020-07-21 00:42:08,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055098937] [2020-07-21 00:42:08,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:42:08,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 00:42:08,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380359430] [2020-07-21 00:42:08,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:42:08,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:42:08,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:42:08,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:42:08,528 INFO L87 Difference]: Start difference. First operand 159 states and 249 transitions. Second operand 24 states. [2020-07-21 00:42:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:42:10,001 INFO L93 Difference]: Finished difference Result 289 states and 454 transitions. [2020-07-21 00:42:10,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:42:10,007 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1251 [2020-07-21 00:42:10,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:42:10,019 INFO L225 Difference]: With dead ends: 289 [2020-07-21 00:42:10,019 INFO L226 Difference]: Without dead ends: 252 [2020-07-21 00:42:10,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2510 GetRequests, 2460 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:42:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-21 00:42:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 131. [2020-07-21 00:42:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 00:42:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 198 transitions. [2020-07-21 00:42:10,072 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 198 transitions. Word has length 1251 [2020-07-21 00:42:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:42:10,074 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 198 transitions. [2020-07-21 00:42:10,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:42:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 198 transitions. [2020-07-21 00:42:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1216 [2020-07-21 00:42:10,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:42:10,105 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 146, 88, 88, 88, 88, 88, 88, 88, 58, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:42:10,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:42:10,319 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:42:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:42:10,320 INFO L82 PathProgramCache]: Analyzing trace with hash 543818353, now seen corresponding path program 23 times [2020-07-21 00:42:10,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:42:10,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290974284] [2020-07-21 00:42:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:42:11,579 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:42:11,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:42:11,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:42:11,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:42:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 88201 backedges. 2563 proven. 5928 refuted. 0 times theorem prover too weak. 79710 trivial. 0 not checked. [2020-07-21 00:42:12,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:42:16,362 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:42:16,469 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:42:16,573 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:42:16,681 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:42:16,789 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:42:25,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:29,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:30,955 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:42:31,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:32,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:32,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:33,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:33,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:33,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:33,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:34,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:34,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:34,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:34,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:34,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 88201 backedges. 2579 proven. 6006 refuted. 0 times theorem prover too weak. 79616 trivial. 0 not checked. [2020-07-21 00:42:37,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290974284] [2020-07-21 00:42:37,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:42:37,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:42:37,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514978773] [2020-07-21 00:42:37,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:42:37,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:42:37,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:42:37,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:42:37,249 INFO L87 Difference]: Start difference. First operand 131 states and 198 transitions. Second operand 22 states. [2020-07-21 00:42:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:42:38,361 INFO L93 Difference]: Finished difference Result 215 states and 333 transitions. [2020-07-21 00:42:38,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:42:38,366 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1215 [2020-07-21 00:42:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:42:38,372 INFO L225 Difference]: With dead ends: 215 [2020-07-21 00:42:38,372 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 00:42:38,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2438 GetRequests, 2390 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:42:38,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 00:42:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 156. [2020-07-21 00:42:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-21 00:42:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 241 transitions. [2020-07-21 00:42:38,407 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 241 transitions. Word has length 1215 [2020-07-21 00:42:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:42:38,407 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 241 transitions. [2020-07-21 00:42:38,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:42:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 241 transitions. [2020-07-21 00:42:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1215 [2020-07-21 00:42:38,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:42:38,430 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 145, 88, 88, 88, 88, 88, 88, 88, 57, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:42:38,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:42:38,645 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:42:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:42:38,646 INFO L82 PathProgramCache]: Analyzing trace with hash 797791953, now seen corresponding path program 24 times [2020-07-21 00:42:38,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:42:38,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574381659] [2020-07-21 00:42:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:42:39,835 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:42:39,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:42:39,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:42:39,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:42:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 88056 backedges. 3725 proven. 4757 refuted. 0 times theorem prover too weak. 79574 trivial. 0 not checked. [2020-07-21 00:42:40,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:42:43,800 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:42:43,911 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:42:44,021 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:42:44,138 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:42:44,258 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:42:44,386 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:42:44,503 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:42:45,840 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:42:45,974 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:42:46,111 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:42:46,258 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:42:46,405 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:42:46,525 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 00:42:54,227 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:42:54,334 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:42:54,455 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:42:54,570 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:42:54,687 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:42:54,810 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:42:54,935 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:42:55,065 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:42:55,192 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:42:55,451 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 00:42:55,556 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:42:55,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:58,164 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:42:58,275 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:42:58,390 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:42:58,508 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:42:58,624 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:42:59,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:42:59,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:01,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:03,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:03,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:04,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:04,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:05,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:05,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:06,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:06,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:06,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:06,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:06,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:07,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 88056 backedges. 3739 proven. 4837 refuted. 0 times theorem prover too weak. 79480 trivial. 0 not checked. [2020-07-21 00:43:14,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574381659] [2020-07-21 00:43:14,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:43:14,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:43:14,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817290085] [2020-07-21 00:43:14,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:43:14,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:43:14,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:43:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:43:14,125 INFO L87 Difference]: Start difference. First operand 156 states and 241 transitions. Second operand 22 states. [2020-07-21 00:43:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:43:15,627 INFO L93 Difference]: Finished difference Result 238 states and 366 transitions. [2020-07-21 00:43:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:43:15,634 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1214 [2020-07-21 00:43:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:43:15,640 INFO L225 Difference]: With dead ends: 238 [2020-07-21 00:43:15,640 INFO L226 Difference]: Without dead ends: 226 [2020-07-21 00:43:15,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2436 GetRequests, 2388 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:43:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-21 00:43:15,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 161. [2020-07-21 00:43:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 00:43:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 247 transitions. [2020-07-21 00:43:15,681 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 247 transitions. Word has length 1214 [2020-07-21 00:43:15,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:43:15,681 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 247 transitions. [2020-07-21 00:43:15,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:43:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 247 transitions. [2020-07-21 00:43:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1238 [2020-07-21 00:43:15,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:43:15,712 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 144, 90, 90, 90, 90, 90, 90, 90, 54, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:43:15,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:43:15,926 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:43:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:43:15,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1962060619, now seen corresponding path program 25 times [2020-07-21 00:43:15,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:43:15,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249706626] [2020-07-21 00:43:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:43:17,140 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:43:17,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:43:17,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:43:17,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:43:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 91476 backedges. 2477 proven. 5539 refuted. 0 times theorem prover too weak. 83460 trivial. 0 not checked. [2020-07-21 00:43:18,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:43:20,998 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:43:21,104 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:43:22,013 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:43:22,129 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:43:22,261 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:43:22,390 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:43:23,726 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 00:43:24,012 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:43:24,140 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:43:24,284 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:43:24,429 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:43:24,565 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:43:24,693 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 00:43:24,909 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 00:43:35,138 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:43:35,244 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:43:35,357 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:43:35,467 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:43:36,421 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:43:36,535 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 00:43:36,665 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:43:36,795 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:43:36,913 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:43:37,023 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:43:37,127 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:43:37,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:37,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:43,808 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:43:43,915 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 00:43:44,029 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:43:44,145 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:43:44,257 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:43:44,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:44,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:46,341 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 00:43:46,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:46,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:48,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:49,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:49,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:50,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:50,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:50,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:50,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:50,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:51,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:43:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 91476 backedges. 2484 proven. 5604 refuted. 0 times theorem prover too weak. 83388 trivial. 0 not checked. [2020-07-21 00:43:55,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249706626] [2020-07-21 00:43:55,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:43:55,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:43:55,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958356066] [2020-07-21 00:43:55,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:43:55,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:43:55,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:43:55,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:43:55,607 INFO L87 Difference]: Start difference. First operand 161 states and 247 transitions. Second operand 22 states. [2020-07-21 00:43:56,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:43:56,910 INFO L93 Difference]: Finished difference Result 289 states and 450 transitions. [2020-07-21 00:43:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:43:56,918 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1237 [2020-07-21 00:43:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:43:56,926 INFO L225 Difference]: With dead ends: 289 [2020-07-21 00:43:56,927 INFO L226 Difference]: Without dead ends: 262 [2020-07-21 00:43:56,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2481 GetRequests, 2436 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:43:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-21 00:43:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 197. [2020-07-21 00:43:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-07-21 00:43:56,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 303 transitions. [2020-07-21 00:43:56,978 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 303 transitions. Word has length 1237 [2020-07-21 00:43:56,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:43:56,979 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 303 transitions. [2020-07-21 00:43:56,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:43:56,980 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 303 transitions. [2020-07-21 00:43:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-21 00:43:57,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:43:57,009 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:43:57,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:43:57,216 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:43:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:43:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash -358896724, now seen corresponding path program 26 times [2020-07-21 00:43:57,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:43:57,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610471848] [2020-07-21 00:43:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:43:58,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:43:58,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:43:58,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:43:58,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:43:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 6793 proven. 1135 refuted. 0 times theorem prover too weak. 81613 trivial. 0 not checked. [2020-07-21 00:43:59,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:44:03,581 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:44:03,695 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:44:03,803 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:44:03,910 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:44:04,167 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-07-21 00:44:07,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:07,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:09,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:09,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:10,577 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-07-21 00:44:10,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:10,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:11,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:11,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:12,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:12,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:12,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:12,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:13,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:17,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 6786 proven. 1214 refuted. 0 times theorem prover too weak. 81541 trivial. 0 not checked. [2020-07-21 00:44:25,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610471848] [2020-07-21 00:44:25,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:44:25,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:44:25,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256920909] [2020-07-21 00:44:25,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:44:25,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:44:25,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:44:25,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:44:25,559 INFO L87 Difference]: Start difference. First operand 197 states and 303 transitions. Second operand 22 states. [2020-07-21 00:44:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:44:26,664 INFO L93 Difference]: Finished difference Result 398 states and 618 transitions. [2020-07-21 00:44:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:44:26,664 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1224 [2020-07-21 00:44:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:44:26,676 INFO L225 Difference]: With dead ends: 398 [2020-07-21 00:44:26,676 INFO L226 Difference]: Without dead ends: 391 [2020-07-21 00:44:26,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2455 GetRequests, 2410 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:44:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-07-21 00:44:26,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 208. [2020-07-21 00:44:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-21 00:44:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 317 transitions. [2020-07-21 00:44:26,735 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 317 transitions. Word has length 1224 [2020-07-21 00:44:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:44:26,736 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 317 transitions. [2020-07-21 00:44:26,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:44:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 317 transitions. [2020-07-21 00:44:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1226 [2020-07-21 00:44:26,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:44:26,759 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 144, 89, 89, 89, 89, 89, 89, 89, 55, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:44:26,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:44:26,968 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:44:26,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:44:26,969 INFO L82 PathProgramCache]: Analyzing trace with hash -77595158, now seen corresponding path program 27 times [2020-07-21 00:44:26,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:44:26,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650151241] [2020-07-21 00:44:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:44:28,103 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:44:28,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:44:28,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:44:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:44:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 89684 backedges. 3535 proven. 4401 refuted. 0 times theorem prover too weak. 81748 trivial. 0 not checked. [2020-07-21 00:44:29,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:44:33,179 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:44:33,378 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:44:33,490 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:44:33,596 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:44:42,618 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 00:44:42,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:42,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:44,830 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-07-21 00:44:44,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:44,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:47,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:48,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:48,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:49,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:49,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:49,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:49,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:49,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:50,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:51,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:44:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 89684 backedges. 3540 proven. 4468 refuted. 0 times theorem prover too weak. 81676 trivial. 0 not checked. [2020-07-21 00:44:55,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650151241] [2020-07-21 00:44:55,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:44:55,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 00:44:55,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83610378] [2020-07-21 00:44:55,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:44:55,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:44:55,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:44:55,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:44:55,964 INFO L87 Difference]: Start difference. First operand 208 states and 317 transitions. Second operand 22 states. [2020-07-21 00:44:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:44:56,938 INFO L93 Difference]: Finished difference Result 328 states and 499 transitions. [2020-07-21 00:44:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:44:56,944 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1225 [2020-07-21 00:44:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:44:56,952 INFO L225 Difference]: With dead ends: 328 [2020-07-21 00:44:56,952 INFO L226 Difference]: Without dead ends: 311 [2020-07-21 00:44:56,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2457 GetRequests, 2412 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:44:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-07-21 00:44:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 195. [2020-07-21 00:44:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-07-21 00:44:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 295 transitions. [2020-07-21 00:44:57,001 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 295 transitions. Word has length 1225 [2020-07-21 00:44:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:44:57,002 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 295 transitions. [2020-07-21 00:44:57,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:44:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 295 transitions. [2020-07-21 00:44:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1237 [2020-07-21 00:44:57,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:44:57,027 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 143, 90, 90, 90, 90, 90, 90, 90, 53, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:44:57,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:44:57,243 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:44:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:44:57,243 INFO L82 PathProgramCache]: Analyzing trace with hash -446497353, now seen corresponding path program 28 times [2020-07-21 00:44:57,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:44:57,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851626222] [2020-07-21 00:44:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:44:58,454 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:44:58,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:44:58,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 00:44:58,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:44:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 2729 proven. 6233 refuted. 0 times theorem prover too weak. 82371 trivial. 0 not checked. [2020-07-21 00:44:59,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:02,295 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:45:03,030 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:45:03,141 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:45:03,258 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:45:03,372 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:45:04,482 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:45:04,605 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:45:04,739 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:45:04,873 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:45:05,000 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 00:45:05,119 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 00:45:05,226 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:45:05,651 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-07-21 00:45:14,281 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:45:14,388 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:45:14,507 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:45:14,628 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:45:14,740 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 00:45:14,844 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 00:45:15,312 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-07-21 00:45:15,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:15,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:21,006 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:45:21,109 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:45:21,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:21,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:23,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:23,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:25,416 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-07-21 00:45:25,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:25,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:26,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:27,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:27,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:27,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:27,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:28,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 2725 proven. 6329 refuted. 0 times theorem prover too weak. 82279 trivial. 0 not checked. [2020-07-21 00:45:31,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851626222] [2020-07-21 00:45:31,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:45:31,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 00:45:31,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683317079] [2020-07-21 00:45:31,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:45:31,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:45:31,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:45:31,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:45:31,664 INFO L87 Difference]: Start difference. First operand 195 states and 295 transitions. Second operand 24 states. [2020-07-21 00:45:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:45:33,012 INFO L93 Difference]: Finished difference Result 371 states and 569 transitions. [2020-07-21 00:45:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:45:33,018 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1236 [2020-07-21 00:45:33,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:45:33,032 INFO L225 Difference]: With dead ends: 371 [2020-07-21 00:45:33,032 INFO L226 Difference]: Without dead ends: 344 [2020-07-21 00:45:33,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2480 GetRequests, 2430 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:45:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-07-21 00:45:33,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 189. [2020-07-21 00:45:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-21 00:45:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 285 transitions. [2020-07-21 00:45:33,092 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 285 transitions. Word has length 1236 [2020-07-21 00:45:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:45:33,092 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 285 transitions. [2020-07-21 00:45:33,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:45:33,093 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 285 transitions. [2020-07-21 00:45:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-21 00:45:33,116 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:45:33,117 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:45:33,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:45:33,332 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:45:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:45:33,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1313694558, now seen corresponding path program 29 times [2020-07-21 00:45:33,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:45:33,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257251892] [2020-07-21 00:45:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:45:34,577 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:45:34,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:45:34,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1357 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 00:45:34,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:45:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 3931 proven. 4941 refuted. 0 times theorem prover too weak. 80669 trivial. 0 not checked. [2020-07-21 00:45:35,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:45:38,802 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:45:38,905 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:45:39,012 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:45:39,121 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:45:39,239 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:45:39,358 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:45:40,466 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:45:40,592 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:45:40,714 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:45:40,839 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 00:45:40,963 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 00:45:41,079 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 00:45:41,214 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-07-21 00:45:49,951 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:45:50,159 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:45:50,268 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 00:45:50,382 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:45:50,500 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:45:50,608 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 00:45:50,711 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 00:45:51,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:51,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:53,493 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:45:54,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:56,227 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 00:45:56,333 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 00:45:56,643 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 00:45:56,761 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 00:45:56,887 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:45:57,007 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 00:45:57,121 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:45:57,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:45:59,651 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 00:45:59,757 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 00:46:00,009 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:46:00,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:00,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:01,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:01,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:02,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:02,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:03,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:03,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:03,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:05,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 3925 proven. 5039 refuted. 0 times theorem prover too weak. 80577 trivial. 0 not checked. [2020-07-21 00:46:13,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257251892] [2020-07-21 00:46:13,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:13,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 00:46:13,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352024830] [2020-07-21 00:46:13,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:46:13,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:46:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:46:13,650 INFO L87 Difference]: Start difference. First operand 189 states and 285 transitions. Second operand 24 states. [2020-07-21 00:46:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:15,681 INFO L93 Difference]: Finished difference Result 453 states and 698 transitions. [2020-07-21 00:46:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:46:15,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1224 [2020-07-21 00:46:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:15,708 INFO L225 Difference]: With dead ends: 453 [2020-07-21 00:46:15,709 INFO L226 Difference]: Without dead ends: 436 [2020-07-21 00:46:15,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2456 GetRequests, 2406 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:46:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-07-21 00:46:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 141. [2020-07-21 00:46:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-21 00:46:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 206 transitions. [2020-07-21 00:46:15,777 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 206 transitions. Word has length 1224 [2020-07-21 00:46:15,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:15,778 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 206 transitions. [2020-07-21 00:46:15,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:46:15,778 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 206 transitions. [2020-07-21 00:46:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1214 [2020-07-21 00:46:15,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:15,799 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 144, 88, 88, 88, 88, 88, 88, 88, 56, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:46:16,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:16,001 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:16,002 INFO L82 PathProgramCache]: Analyzing trace with hash 493369557, now seen corresponding path program 30 times [2020-07-21 00:46:16,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:16,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803125529] [2020-07-21 00:46:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:17,607 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:46:17,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:17,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 2024 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 00:46:17,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 5851 proven. 2622 refuted. 0 times theorem prover too weak. 79439 trivial. 0 not checked. [2020-07-21 00:46:18,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:23,460 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:46:23,565 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:46:24,006 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:46:24,119 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:46:24,243 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:46:24,377 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:46:25,119 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:46:25,256 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:46:25,410 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:46:25,561 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:46:25,723 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:46:25,887 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 00:46:26,057 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:46:26,228 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 00:46:26,382 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 00:46:26,538 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 00:46:26,687 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 00:46:26,823 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:46:26,954 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 00:46:27,069 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 00:46:27,177 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 00:46:29,151 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 00:46:29,260 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 00:46:29,379 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:46:29,495 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:46:30,000 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:46:30,140 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 00:46:30,289 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:46:30,439 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 00:46:31,272 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:46:31,423 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 00:46:31,588 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:46:31,747 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:46:31,897 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 00:46:32,010 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 00:46:32,136 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 00:46:32,251 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 00:46:32,355 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 00:46:32,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:34,754 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 00:46:37,036 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 00:46:37,144 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 00:46:37,258 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:46:37,373 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 00:46:38,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:40,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:41,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:42,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:43,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:43,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:43,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:44,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:46:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 5863 proven. 2704 refuted. 0 times theorem prover too weak. 79345 trivial. 0 not checked. [2020-07-21 00:46:51,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803125529] [2020-07-21 00:46:51,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:46:51,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 00:46:51,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652013096] [2020-07-21 00:46:51,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:46:51,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:46:51,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:46:51,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:46:51,308 INFO L87 Difference]: Start difference. First operand 141 states and 206 transitions. Second operand 22 states. [2020-07-21 00:46:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:46:52,160 INFO L93 Difference]: Finished difference Result 276 states and 416 transitions. [2020-07-21 00:46:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 00:46:52,164 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1213 [2020-07-21 00:46:52,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:46:52,171 INFO L225 Difference]: With dead ends: 276 [2020-07-21 00:46:52,172 INFO L226 Difference]: Without dead ends: 269 [2020-07-21 00:46:52,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2434 GetRequests, 2386 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 00:46:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-21 00:46:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 176. [2020-07-21 00:46:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-21 00:46:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 261 transitions. [2020-07-21 00:46:52,206 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 261 transitions. Word has length 1213 [2020-07-21 00:46:52,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:46:52,207 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 261 transitions. [2020-07-21 00:46:52,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:46:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 261 transitions. [2020-07-21 00:46:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-21 00:46:52,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:46:52,225 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:46:52,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:46:52,434 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:46:52,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:46:52,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1018676894, now seen corresponding path program 31 times [2020-07-21 00:46:52,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:46:52,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81185589] [2020-07-21 00:46:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:46:53,731 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:46:53,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:46:53,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 2037 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:46:53,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:46:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 5501 proven. 2427 refuted. 0 times theorem prover too weak. 81613 trivial. 0 not checked. [2020-07-21 00:46:54,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:46:55,889 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 00:47:00,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:00,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:02,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:02,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:04,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:05,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:05,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:06,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts