/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:36:19,556 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 21:36:19,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:36:19,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:36:19,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:36:19,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:36:19,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:36:19,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:36:19,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:36:19,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:36:19,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:36:19,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:36:19,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:36:19,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:36:19,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:36:19,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:36:19,649 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:36:19,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:36:19,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:36:19,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:36:19,656 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:36:19,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:36:19,656 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:36:19,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:36:19,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:36:19,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:36:19,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:36:19,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:36:19,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:36:19,659 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:36:19,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:36:19,660 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:36:19,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:36:19,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:36:19,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:36:19,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:36:19,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:36:19,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:36:19,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:36:19,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:36:19,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:36:19,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:36:19,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:19,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:36:19,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:36:19,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:36:20,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:36:20,052 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:36:20,058 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:36:20,061 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:36:20,062 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:36:20,063 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-20 21:36:20,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa25f0b2a/a07b66b98f0544fe97ea39c0ac9486b3/FLAG8556567b1 [2020-07-20 21:36:20,881 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:36:20,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-20 21:36:20,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa25f0b2a/a07b66b98f0544fe97ea39c0ac9486b3/FLAG8556567b1 [2020-07-20 21:36:21,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa25f0b2a/a07b66b98f0544fe97ea39c0ac9486b3 [2020-07-20 21:36:21,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:36:21,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:36:21,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:36:21,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:36:21,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:36:21,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:36:21" (1/1) ... [2020-07-20 21:36:21,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73212535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:21, skipping insertion in model container [2020-07-20 21:36:21,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:36:21" (1/1) ... [2020-07-20 21:36:21,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:36:21,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:36:21,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:36:21,582 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:36:21,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:36:21,637 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:36:21,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:21 WrapperNode [2020-07-20 21:36:21,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:36:21,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:36:21,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:36:21,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:36:21,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:21" (1/1) ... [2020-07-20 21:36:21,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:21" (1/1) ... [2020-07-20 21:36:21,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:21" (1/1) ... [2020-07-20 21:36:21,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:21" (1/1) ... [2020-07-20 21:36:21,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:21" (1/1) ... [2020-07-20 21:36:21,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:21" (1/1) ... [2020-07-20 21:36:21,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:21" (1/1) ... [2020-07-20 21:36:21,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:36:21,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:36:21,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:36:21,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:36:21,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:36:21,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:36:21,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:36:21,901 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-20 21:36:21,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:36:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:36:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:36:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-20 21:36:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:36:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:36:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:36:22,166 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:36:22,167 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:36:22,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:36:22 BoogieIcfgContainer [2020-07-20 21:36:22,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:36:22,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:36:22,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:36:22,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:36:22,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:36:21" (1/3) ... [2020-07-20 21:36:22,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a1bdc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:36:22, skipping insertion in model container [2020-07-20 21:36:22,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:36:21" (2/3) ... [2020-07-20 21:36:22,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a1bdc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:36:22, skipping insertion in model container [2020-07-20 21:36:22,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:36:22" (3/3) ... [2020-07-20 21:36:22,192 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2020-07-20 21:36:22,211 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:36:22,224 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:36:22,251 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:36:22,321 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:36:22,325 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:36:22,325 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:36:22,325 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:36:22,325 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:36:22,326 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:36:22,326 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:36:22,326 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:36:22,374 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 21:36:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:36:22,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:22,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:22,395 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:22,414 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-20 21:36:22,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:22,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107026014] [2020-07-20 21:36:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:22,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:36:22,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:36:22,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:36:22,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:36:22,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107026014] [2020-07-20 21:36:22,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:36:22,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:36:22,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622307259] [2020-07-20 21:36:22,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:36:22,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:22,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:36:22,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:36:22,707 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 21:36:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:22,866 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 21:36:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:36:22,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 21:36:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:22,888 INFO L225 Difference]: With dead ends: 35 [2020-07-20 21:36:22,889 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 21:36:22,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:36:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 21:36:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 21:36:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 21:36:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 21:36:22,972 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 21:36:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:22,973 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 21:36:22,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:36:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 21:36:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:36:22,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:22,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:23,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:23,192 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:23,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:23,193 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-20 21:36:23,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:23,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711339107] [2020-07-20 21:36:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:23,239 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:36:23,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:23,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:36:23,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:36:23,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:36:23,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711339107] [2020-07-20 21:36:23,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:36:23,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:36:23,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732638234] [2020-07-20 21:36:23,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:36:23,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:23,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:36:23,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:36:23,294 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 21:36:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:23,419 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 21:36:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:36:23,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 21:36:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:23,422 INFO L225 Difference]: With dead ends: 27 [2020-07-20 21:36:23,423 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 21:36:23,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:36:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 21:36:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 21:36:23,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 21:36:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 21:36:23,446 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 21:36:23,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:23,446 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 21:36:23,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:36:23,448 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 21:36:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:36:23,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:23,453 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] [2020-07-20 21:36:23,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:23,671 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:23,672 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-20 21:36:23,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:23,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597130972] [2020-07-20 21:36:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:23,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:36:23,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:36:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:36:23,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:24,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 21:36:24,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597130972] [2020-07-20 21:36:24,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:24,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 21:36:24,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023486868] [2020-07-20 21:36:24,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:36:24,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:24,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:36:24,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:36:24,285 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 21:36:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:24,497 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 21:36:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:36:24,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 21:36:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:24,500 INFO L225 Difference]: With dead ends: 32 [2020-07-20 21:36:24,501 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 21:36:24,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:36:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 21:36:24,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 21:36:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 21:36:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 21:36:24,514 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 21:36:24,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:24,514 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 21:36:24,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:36:24,515 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 21:36:24,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:36:24,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:24,517 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] [2020-07-20 21:36:24,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:24,733 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:24,733 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-20 21:36:24,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:24,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134071181] [2020-07-20 21:36:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:24,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:24,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:36:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 21:36:24,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:25,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 21:36:25,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134071181] [2020-07-20 21:36:25,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:25,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 21:36:25,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724939577] [2020-07-20 21:36:25,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:36:25,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:25,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:36:25,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:36:25,085 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 21:36:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:25,213 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 21:36:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:36:25,214 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 21:36:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:25,217 INFO L225 Difference]: With dead ends: 37 [2020-07-20 21:36:25,217 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 21:36:25,218 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 [2020-07-20 21:36:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 21:36:25,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 21:36:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 21:36:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 21:36:25,230 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 21:36:25,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:25,230 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 21:36:25,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:36:25,231 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 21:36:25,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 21:36:25,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:25,233 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] [2020-07-20 21:36:25,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:25,448 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:25,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:25,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-20 21:36:25,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:25,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142904851] [2020-07-20 21:36:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:25,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:25,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:25,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:36:25,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:36:25,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:25,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:25,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:25,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:25,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 21:36:26,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142904851] [2020-07-20 21:36:26,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:26,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 21:36:26,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367702825] [2020-07-20 21:36:26,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 21:36:26,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:26,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 21:36:26,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:36:26,040 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 21:36:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:26,276 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 21:36:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:36:26,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 21:36:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:26,282 INFO L225 Difference]: With dead ends: 42 [2020-07-20 21:36:26,282 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 21:36:26,283 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 [2020-07-20 21:36:26,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 21:36:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 21:36:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 21:36:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 21:36:26,296 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 21:36:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:26,296 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 21:36:26,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 21:36:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 21:36:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 21:36:26,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:26,299 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] [2020-07-20 21:36:26,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:26,504 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:26,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-20 21:36:26,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:26,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399346384] [2020-07-20 21:36:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:26,550 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:26,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:26,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:36:26,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 21:36:26,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:26,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:26,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:26,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 21:36:27,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399346384] [2020-07-20 21:36:27,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:27,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 21:36:27,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623585545] [2020-07-20 21:36:27,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 21:36:27,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:27,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 21:36:27,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:36:27,003 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 21:36:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:27,188 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 21:36:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:36:27,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 21:36:27,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:27,198 INFO L225 Difference]: With dead ends: 47 [2020-07-20 21:36:27,198 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 21:36:27,200 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 [2020-07-20 21:36:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 21:36:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 21:36:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 21:36:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 21:36:27,227 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 21:36:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:27,229 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 21:36:27,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 21:36:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 21:36:27,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 21:36:27,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:27,245 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] [2020-07-20 21:36:27,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:27,447 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:27,448 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-20 21:36:27,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:27,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552309833] [2020-07-20 21:36:27,450 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:27,502 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:27,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:27,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:36:27,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 21:36:27,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:28,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 21:36:28,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552309833] [2020-07-20 21:36:28,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:28,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 21:36:28,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487776482] [2020-07-20 21:36:28,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:36:28,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:28,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:36:28,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:36:28,388 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 21:36:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:28,649 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 21:36:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:36:28,649 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 21:36:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:28,652 INFO L225 Difference]: With dead ends: 52 [2020-07-20 21:36:28,652 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 21:36:28,653 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 [2020-07-20 21:36:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 21:36:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 21:36:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 21:36:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 21:36:28,668 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 21:36:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:28,668 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 21:36:28,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:36:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 21:36:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 21:36:28,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:28,671 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] [2020-07-20 21:36:28,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:28,877 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:28,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-20 21:36:28,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:28,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166166073] [2020-07-20 21:36:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:28,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:28,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:36:28,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-20 21:36:29,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:29,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:29,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:29,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:29,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-20 21:36:29,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166166073] [2020-07-20 21:36:29,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:29,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 21:36:29,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315158842] [2020-07-20 21:36:29,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:36:29,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:29,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:36:29,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:36:29,898 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-20 21:36:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:30,105 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-20 21:36:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:36:30,107 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-20 21:36:30,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:30,110 INFO L225 Difference]: With dead ends: 57 [2020-07-20 21:36:30,110 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 21:36:30,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:36:30,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 21:36:30,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-20 21:36:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 21:36:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 21:36:30,128 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-20 21:36:30,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:30,129 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 21:36:30,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:36:30,129 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 21:36:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 21:36:30,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:30,132 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] [2020-07-20 21:36:30,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:30,346 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:30,348 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-20 21:36:30,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:30,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710437444] [2020-07-20 21:36:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:30,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:30,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:30,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:36:30,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-20 21:36:30,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:31,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 21:36:31,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710437444] [2020-07-20 21:36:31,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:31,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 21:36:31,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252408922] [2020-07-20 21:36:31,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:36:31,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:31,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:36:31,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:36:31,778 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-20 21:36:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:32,159 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-20 21:36:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:36:32,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-20 21:36:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:32,163 INFO L225 Difference]: With dead ends: 62 [2020-07-20 21:36:32,164 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 21:36:32,165 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 [2020-07-20 21:36:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 21:36:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-20 21:36:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 21:36:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 21:36:32,181 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-20 21:36:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:32,181 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 21:36:32,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:36:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 21:36:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-20 21:36:32,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:32,185 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] [2020-07-20 21:36:32,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:32,401 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:32,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:32,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-20 21:36:32,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:32,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101237214] [2020-07-20 21:36:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:32,497 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:32,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:32,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:36:32,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-20 21:36:32,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:33,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:33,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:33,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:33,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:33,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:33,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-20 21:36:33,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101237214] [2020-07-20 21:36:33,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:33,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 21:36:33,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600574119] [2020-07-20 21:36:33,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:36:33,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:33,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:36:33,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:36:33,924 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-20 21:36:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:34,173 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-20 21:36:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:36:34,174 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-20 21:36:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:34,178 INFO L225 Difference]: With dead ends: 67 [2020-07-20 21:36:34,178 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 21:36:34,180 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 [2020-07-20 21:36:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 21:36:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-20 21:36:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 21:36:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 21:36:34,205 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-20 21:36:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:34,208 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 21:36:34,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:36:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 21:36:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 21:36:34,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:34,220 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] [2020-07-20 21:36:34,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:34,435 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:34,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-20 21:36:34,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:34,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262603987] [2020-07-20 21:36:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:34,575 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:34,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:34,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:36:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-20 21:36:34,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:36,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-20 21:36:36,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262603987] [2020-07-20 21:36:36,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:36,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 21:36:36,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811888205] [2020-07-20 21:36:36,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:36:36,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:36,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:36:36,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:36:36,914 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-20 21:36:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:37,216 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-20 21:36:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:36:37,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-20 21:36:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:37,222 INFO L225 Difference]: With dead ends: 72 [2020-07-20 21:36:37,222 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 21:36:37,224 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 [2020-07-20 21:36:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 21:36:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-20 21:36:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 21:36:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 21:36:37,247 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-20 21:36:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:37,249 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 21:36:37,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:36:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 21:36:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-07-20 21:36:37,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:37,255 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] [2020-07-20 21:36:37,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:37,469 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1101007572, now seen corresponding path program 5 times [2020-07-20 21:36:37,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:37,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935511074] [2020-07-20 21:36:37,472 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 [2020-07-20 21:36:37,623 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:37,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:36:37,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1061 refuted. 0 times theorem prover too weak. 3827 trivial. 0 not checked. [2020-07-20 21:36:37,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:39,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:39,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:39,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1101 refuted. 0 times theorem prover too weak. 3787 trivial. 0 not checked. [2020-07-20 21:36:40,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935511074] [2020-07-20 21:36:40,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:40,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-20 21:36:40,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889656904] [2020-07-20 21:36:40,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:36:40,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:40,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:36:40,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:36:40,223 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 16 states. [2020-07-20 21:36:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:40,537 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-20 21:36:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:36:40,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 300 [2020-07-20 21:36:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:40,547 INFO L225 Difference]: With dead ends: 77 [2020-07-20 21:36:40,547 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 21:36:40,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 572 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:36:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 21:36:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-20 21:36:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 21:36:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 21:36:40,587 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 300 [2020-07-20 21:36:40,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:40,589 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 21:36:40,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:36:40,589 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 21:36:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 21:36:40,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:40,602 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:40,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:40,815 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:40,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:40,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1530653315, now seen corresponding path program 6 times [2020-07-20 21:36:40,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:40,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575136485] [2020-07-20 21:36:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:41,023 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:41,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:41,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:36:41,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 268 proven. 1385 refuted. 0 times theorem prover too weak. 5484 trivial. 0 not checked. [2020-07-20 21:36:41,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:42,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:43,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:43,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:43,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:43,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:44,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:44,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:44,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 268 proven. 1436 refuted. 0 times theorem prover too weak. 5433 trivial. 0 not checked. [2020-07-20 21:36:44,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575136485] [2020-07-20 21:36:44,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:44,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-20 21:36:44,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354126363] [2020-07-20 21:36:44,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:36:44,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:44,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:36:44,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:36:44,199 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 18 states. [2020-07-20 21:36:44,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:44,507 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-20 21:36:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:36:44,508 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 351 [2020-07-20 21:36:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:44,512 INFO L225 Difference]: With dead ends: 82 [2020-07-20 21:36:44,512 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 21:36:44,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 671 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:36:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 21:36:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-20 21:36:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 21:36:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 21:36:44,526 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 351 [2020-07-20 21:36:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:44,527 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 21:36:44,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:36:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 21:36:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-07-20 21:36:44,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:44,530 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 44, 26, 26, 26, 26, 26, 26, 26, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:44,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:44,744 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:44,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1634090709, now seen corresponding path program 6 times [2020-07-20 21:36:44,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:44,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825042474] [2020-07-20 21:36:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:44,924 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:44,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:36:44,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7758 backedges. 495 proven. 1297 refuted. 0 times theorem prover too weak. 5966 trivial. 0 not checked. [2020-07-20 21:36:45,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:46,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:46,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:47,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7758 backedges. 499 proven. 1350 refuted. 0 times theorem prover too weak. 5909 trivial. 0 not checked. [2020-07-20 21:36:48,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825042474] [2020-07-20 21:36:48,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:48,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-20 21:36:48,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507442209] [2020-07-20 21:36:48,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:36:48,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:48,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:36:48,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:36:48,090 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 18 states. [2020-07-20 21:36:48,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:48,429 INFO L93 Difference]: Finished difference Result 147 states and 749 transitions. [2020-07-20 21:36:48,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:36:48,429 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 369 [2020-07-20 21:36:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:48,432 INFO L225 Difference]: With dead ends: 147 [2020-07-20 21:36:48,433 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 21:36:48,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 706 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:36:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 21:36:48,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-20 21:36:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 21:36:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 122 transitions. [2020-07-20 21:36:48,461 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 122 transitions. Word has length 369 [2020-07-20 21:36:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:48,463 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 122 transitions. [2020-07-20 21:36:48,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:36:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 122 transitions. [2020-07-20 21:36:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-07-20 21:36:48,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:48,468 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 36, 23, 23, 23, 23, 23, 23, 23, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:48,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:48,682 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:48,683 INFO L82 PathProgramCache]: Analyzing trace with hash -116952636, now seen corresponding path program 7 times [2020-07-20 21:36:48,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:48,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375617223] [2020-07-20 21:36:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:48,947 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:48,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:36:48,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5966 backedges. 386 proven. 1152 refuted. 0 times theorem prover too weak. 4428 trivial. 0 not checked. [2020-07-20 21:36:49,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:50,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:50,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5966 backedges. 392 proven. 1203 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2020-07-20 21:36:51,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375617223] [2020-07-20 21:36:51,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:51,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-20 21:36:51,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772500577] [2020-07-20 21:36:51,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:36:51,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:51,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:36:51,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:36:51,732 INFO L87 Difference]: Start difference. First operand 70 states and 122 transitions. Second operand 18 states. [2020-07-20 21:36:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:52,028 INFO L93 Difference]: Finished difference Result 157 states and 312 transitions. [2020-07-20 21:36:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:36:52,029 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 325 [2020-07-20 21:36:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:52,032 INFO L225 Difference]: With dead ends: 157 [2020-07-20 21:36:52,032 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 21:36:52,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 618 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:36:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 21:36:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-20 21:36:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 21:36:52,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2020-07-20 21:36:52,048 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 325 [2020-07-20 21:36:52,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:52,049 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2020-07-20 21:36:52,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:36:52,049 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2020-07-20 21:36:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 21:36:52,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:52,053 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:52,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:52,267 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:52,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2020-07-20 21:36:52,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:52,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889782832] [2020-07-20 21:36:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:52,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:36:52,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:52,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 167 conjunts are in the unsatisfiable core [2020-07-20 21:36:52,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-20 21:36:52,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-20 21:36:56,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889782832] [2020-07-20 21:36:56,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:56,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-20 21:36:56,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640969340] [2020-07-20 21:36:56,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 21:36:56,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:56,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 21:36:56,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:36:56,185 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand 28 states. [2020-07-20 21:36:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:56,672 INFO L93 Difference]: Finished difference Result 134 states and 221 transitions. [2020-07-20 21:36:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 21:36:56,673 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 286 [2020-07-20 21:36:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:56,677 INFO L225 Difference]: With dead ends: 134 [2020-07-20 21:36:56,677 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 21:36:56,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 534 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:36:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 21:36:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2020-07-20 21:36:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 21:36:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 173 transitions. [2020-07-20 21:36:56,700 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 173 transitions. Word has length 286 [2020-07-20 21:36:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:56,701 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 173 transitions. [2020-07-20 21:36:56,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 21:36:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 173 transitions. [2020-07-20 21:36:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-07-20 21:36:56,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:56,706 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 34, 23, 23, 23, 23, 23, 23, 23, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:56,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:56,921 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:56,922 INFO L82 PathProgramCache]: Analyzing trace with hash 56320238, now seen corresponding path program 9 times [2020-07-20 21:36:56,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:56,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618068856] [2020-07-20 21:36:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:57,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:57,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:57,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:36:57,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 602 proven. 722 refuted. 0 times theorem prover too weak. 4573 trivial. 0 not checked. [2020-07-20 21:36:57,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:58,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:58,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:59,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:59,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:59,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:59,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 610 proven. 756 refuted. 0 times theorem prover too weak. 4531 trivial. 0 not checked. [2020-07-20 21:36:59,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618068856] [2020-07-20 21:36:59,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:59,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-20 21:36:59,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419307946] [2020-07-20 21:36:59,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:36:59,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:59,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:36:59,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:36:59,308 INFO L87 Difference]: Start difference. First operand 101 states and 173 transitions. Second operand 16 states. [2020-07-20 21:36:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:59,509 INFO L93 Difference]: Finished difference Result 137 states and 227 transitions. [2020-07-20 21:36:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:36:59,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 323 [2020-07-20 21:36:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:59,514 INFO L225 Difference]: With dead ends: 137 [2020-07-20 21:36:59,514 INFO L226 Difference]: Without dead ends: 125 [2020-07-20 21:36:59,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 618 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:36:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-20 21:36:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 114. [2020-07-20 21:36:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-20 21:36:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 196 transitions. [2020-07-20 21:36:59,545 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 196 transitions. Word has length 323 [2020-07-20 21:36:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:59,546 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 196 transitions. [2020-07-20 21:36:59,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:36:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 196 transitions. [2020-07-20 21:36:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-07-20 21:36:59,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:59,553 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 33, 22, 22, 22, 22, 22, 22, 22, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:59,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:59,768 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1059921663, now seen corresponding path program 10 times [2020-07-20 21:36:59,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:59,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621020789] [2020-07-20 21:36:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:59,994 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:59,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:59,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:37:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 374 proven. 959 refuted. 0 times theorem prover too weak. 4079 trivial. 0 not checked. [2020-07-20 21:37:00,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:01,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:01,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:01,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:01,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 375 proven. 993 refuted. 0 times theorem prover too weak. 4044 trivial. 0 not checked. [2020-07-20 21:37:02,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621020789] [2020-07-20 21:37:02,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:02,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 21:37:02,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975398664] [2020-07-20 21:37:02,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:37:02,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:02,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:37:02,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:37:02,548 INFO L87 Difference]: Start difference. First operand 114 states and 196 transitions. Second operand 18 states. [2020-07-20 21:37:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:02,818 INFO L93 Difference]: Finished difference Result 212 states and 377 transitions. [2020-07-20 21:37:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:02,818 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 310 [2020-07-20 21:37:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:02,822 INFO L225 Difference]: With dead ends: 212 [2020-07-20 21:37:02,822 INFO L226 Difference]: Without dead ends: 114 [2020-07-20 21:37:02,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 590 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:37:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-20 21:37:02,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-07-20 21:37:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-20 21:37:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 182 transitions. [2020-07-20 21:37:02,846 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 182 transitions. Word has length 310 [2020-07-20 21:37:02,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:02,846 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 182 transitions. [2020-07-20 21:37:02,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:37:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 182 transitions. [2020-07-20 21:37:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-07-20 21:37:02,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:02,854 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 34, 23, 23, 23, 23, 23, 23, 23, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:03,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:03,070 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:03,070 INFO L82 PathProgramCache]: Analyzing trace with hash 574106978, now seen corresponding path program 11 times [2020-07-20 21:37:03,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:03,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804093820] [2020-07-20 21:37:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:03,336 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:03,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:03,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:37:03,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 984 proven. 340 refuted. 0 times theorem prover too weak. 4573 trivial. 0 not checked. [2020-07-20 21:37:03,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:04,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:04,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:05,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:05,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:05,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:05,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 990 proven. 376 refuted. 0 times theorem prover too weak. 4531 trivial. 0 not checked. [2020-07-20 21:37:05,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804093820] [2020-07-20 21:37:05,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:05,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-20 21:37:05,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645708491] [2020-07-20 21:37:05,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:37:05,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:05,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:37:05,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:37:05,517 INFO L87 Difference]: Start difference. First operand 114 states and 182 transitions. Second operand 16 states. [2020-07-20 21:37:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:05,713 INFO L93 Difference]: Finished difference Result 150 states and 237 transitions. [2020-07-20 21:37:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:37:05,714 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 323 [2020-07-20 21:37:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:05,718 INFO L225 Difference]: With dead ends: 150 [2020-07-20 21:37:05,719 INFO L226 Difference]: Without dead ends: 143 [2020-07-20 21:37:05,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 618 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:37:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-20 21:37:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 119. [2020-07-20 21:37:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-20 21:37:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 193 transitions. [2020-07-20 21:37:05,740 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 193 transitions. Word has length 323 [2020-07-20 21:37:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:05,741 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 193 transitions. [2020-07-20 21:37:05,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:37:05,741 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 193 transitions. [2020-07-20 21:37:05,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 21:37:05,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:05,749 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 33, 24, 24, 24, 24, 24, 24, 24, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:05,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:05,964 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:05,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1986978401, now seen corresponding path program 12 times [2020-07-20 21:37:05,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:05,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603312418] [2020-07-20 21:37:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:06,195 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:06,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:06,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:37:06,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6336 backedges. 463 proven. 990 refuted. 0 times theorem prover too weak. 4883 trivial. 0 not checked. [2020-07-20 21:37:06,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:07,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:07,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:08,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:08,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:08,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:08,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:08,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:08,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:08,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6336 backedges. 462 proven. 1026 refuted. 0 times theorem prover too weak. 4848 trivial. 0 not checked. [2020-07-20 21:37:08,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603312418] [2020-07-20 21:37:08,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:08,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 21:37:08,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196296437] [2020-07-20 21:37:08,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:37:08,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:08,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:37:08,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:37:08,672 INFO L87 Difference]: Start difference. First operand 119 states and 193 transitions. Second operand 18 states. [2020-07-20 21:37:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:08,906 INFO L93 Difference]: Finished difference Result 148 states and 228 transitions. [2020-07-20 21:37:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:08,907 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 334 [2020-07-20 21:37:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:08,910 INFO L225 Difference]: With dead ends: 148 [2020-07-20 21:37:08,910 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 21:37:08,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 638 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:37:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 21:37:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2020-07-20 21:37:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-20 21:37:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 178 transitions. [2020-07-20 21:37:08,928 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 178 transitions. Word has length 334 [2020-07-20 21:37:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:08,928 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 178 transitions. [2020-07-20 21:37:08,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:37:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 178 transitions. [2020-07-20 21:37:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-20 21:37:08,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:08,934 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:09,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:09,148 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash 500297194, now seen corresponding path program 13 times [2020-07-20 21:37:09,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:09,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202319193] [2020-07-20 21:37:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:09,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:09,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:09,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:37:09,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 526 proven. 560 refuted. 0 times theorem prover too weak. 3894 trivial. 0 not checked. [2020-07-20 21:37:09,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:10,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:11,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 528 proven. 582 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2020-07-20 21:37:11,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202319193] [2020-07-20 21:37:11,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:11,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-20 21:37:11,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129771340] [2020-07-20 21:37:11,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:37:11,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:11,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:37:11,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:37:11,194 INFO L87 Difference]: Start difference. First operand 111 states and 178 transitions. Second operand 16 states. [2020-07-20 21:37:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:11,363 INFO L93 Difference]: Finished difference Result 168 states and 261 transitions. [2020-07-20 21:37:11,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:37:11,364 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 298 [2020-07-20 21:37:11,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:11,367 INFO L225 Difference]: With dead ends: 168 [2020-07-20 21:37:11,368 INFO L226 Difference]: Without dead ends: 151 [2020-07-20 21:37:11,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 570 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:37:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-20 21:37:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 127. [2020-07-20 21:37:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-20 21:37:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 202 transitions. [2020-07-20 21:37:11,389 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 202 transitions. Word has length 298 [2020-07-20 21:37:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:11,390 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 202 transitions. [2020-07-20 21:37:11,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:37:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 202 transitions. [2020-07-20 21:37:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-07-20 21:37:11,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:11,397 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 33, 22, 22, 22, 22, 22, 22, 22, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:11,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:11,612 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:11,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1565266763, now seen corresponding path program 14 times [2020-07-20 21:37:11,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:11,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191581928] [2020-07-20 21:37:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:11,862 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:11,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:11,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:37:11,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 619 proven. 714 refuted. 0 times theorem prover too weak. 4079 trivial. 0 not checked. [2020-07-20 21:37:12,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:13,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:13,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:13,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:13,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:13,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:13,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:14,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:14,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 616 proven. 752 refuted. 0 times theorem prover too weak. 4044 trivial. 0 not checked. [2020-07-20 21:37:14,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191581928] [2020-07-20 21:37:14,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:14,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 21:37:14,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520740999] [2020-07-20 21:37:14,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:37:14,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:14,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:37:14,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:37:14,289 INFO L87 Difference]: Start difference. First operand 127 states and 202 transitions. Second operand 18 states. [2020-07-20 21:37:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:14,518 INFO L93 Difference]: Finished difference Result 193 states and 292 transitions. [2020-07-20 21:37:14,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:14,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 310 [2020-07-20 21:37:14,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:14,524 INFO L225 Difference]: With dead ends: 193 [2020-07-20 21:37:14,524 INFO L226 Difference]: Without dead ends: 176 [2020-07-20 21:37:14,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 590 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:37:14,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-20 21:37:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 116. [2020-07-20 21:37:14,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-20 21:37:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 185 transitions. [2020-07-20 21:37:14,545 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 185 transitions. Word has length 310 [2020-07-20 21:37:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:14,545 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 185 transitions. [2020-07-20 21:37:14,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:37:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 185 transitions. [2020-07-20 21:37:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-20 21:37:14,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:14,551 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:14,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:14,765 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:14,766 INFO L82 PathProgramCache]: Analyzing trace with hash 476971754, now seen corresponding path program 15 times [2020-07-20 21:37:14,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:14,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930345472] [2020-07-20 21:37:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:15,045 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:15,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:15,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:37:15,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 814 proven. 272 refuted. 0 times theorem prover too weak. 3894 trivial. 0 not checked. [2020-07-20 21:37:15,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:15,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:16,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:16,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:16,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:16,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:16,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:16,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 814 proven. 296 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2020-07-20 21:37:16,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930345472] [2020-07-20 21:37:16,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:16,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-20 21:37:16,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737658376] [2020-07-20 21:37:16,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:37:16,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:16,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:37:16,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:37:16,835 INFO L87 Difference]: Start difference. First operand 116 states and 185 transitions. Second operand 16 states. [2020-07-20 21:37:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:17,023 INFO L93 Difference]: Finished difference Result 191 states and 305 transitions. [2020-07-20 21:37:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:37:17,024 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 298 [2020-07-20 21:37:17,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:17,028 INFO L225 Difference]: With dead ends: 191 [2020-07-20 21:37:17,028 INFO L226 Difference]: Without dead ends: 184 [2020-07-20 21:37:17,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 570 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:37:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-20 21:37:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 129. [2020-07-20 21:37:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-20 21:37:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 207 transitions. [2020-07-20 21:37:17,053 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 207 transitions. Word has length 298 [2020-07-20 21:37:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:17,054 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 207 transitions. [2020-07-20 21:37:17,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:37:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 207 transitions. [2020-07-20 21:37:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-20 21:37:17,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:17,061 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:17,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:17,276 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:17,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:17,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1448945942, now seen corresponding path program 16 times [2020-07-20 21:37:17,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:17,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546901174] [2020-07-20 21:37:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:17,582 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:17,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:17,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:37:17,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 960 proven. 313 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-20 21:37:17,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:18,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:19,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:19,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:19,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:19,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:19,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:19,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 955 proven. 353 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-20 21:37:19,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546901174] [2020-07-20 21:37:19,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:19,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 21:37:19,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353641656] [2020-07-20 21:37:19,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:37:19,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:19,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:37:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:37:19,885 INFO L87 Difference]: Start difference. First operand 129 states and 207 transitions. Second operand 18 states. [2020-07-20 21:37:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:20,175 INFO L93 Difference]: Finished difference Result 229 states and 356 transitions. [2020-07-20 21:37:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:20,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-20 21:37:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:20,180 INFO L225 Difference]: With dead ends: 229 [2020-07-20 21:37:20,180 INFO L226 Difference]: Without dead ends: 209 [2020-07-20 21:37:20,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:37:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-20 21:37:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 81. [2020-07-20 21:37:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 21:37:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 125 transitions. [2020-07-20 21:37:20,199 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 125 transitions. Word has length 298 [2020-07-20 21:37:20,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:20,200 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 125 transitions. [2020-07-20 21:37:20,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:37:20,200 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 125 transitions. [2020-07-20 21:37:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-20 21:37:20,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:20,203 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:20,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:20,417 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:20,418 INFO L82 PathProgramCache]: Analyzing trace with hash -258866501, now seen corresponding path program 17 times [2020-07-20 21:37:20,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:20,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40355313] [2020-07-20 21:37:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:20,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:20,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:37:20,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 270 proven. 1056 refuted. 0 times theorem prover too weak. 3275 trivial. 0 not checked. [2020-07-20 21:37:20,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:22,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:22,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:23,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:23,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:23,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:23,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:23,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:23,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:23,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 280 proven. 1103 refuted. 0 times theorem prover too weak. 3218 trivial. 0 not checked. [2020-07-20 21:37:23,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40355313] [2020-07-20 21:37:23,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:23,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-20 21:37:23,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286224188] [2020-07-20 21:37:23,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:37:23,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:23,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:37:23,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:37:23,458 INFO L87 Difference]: Start difference. First operand 81 states and 125 transitions. Second operand 18 states. [2020-07-20 21:37:23,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:23,741 INFO L93 Difference]: Finished difference Result 180 states and 281 transitions. [2020-07-20 21:37:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:23,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 287 [2020-07-20 21:37:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:23,744 INFO L225 Difference]: With dead ends: 180 [2020-07-20 21:37:23,744 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 21:37:23,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 542 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:37:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 21:37:23,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-20 21:37:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 21:37:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-07-20 21:37:23,756 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 287 [2020-07-20 21:37:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:23,756 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-07-20 21:37:23,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:37:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-07-20 21:37:23,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-20 21:37:23,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:23,760 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:23,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:23,974 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:23,974 INFO L82 PathProgramCache]: Analyzing trace with hash -551621334, now seen corresponding path program 18 times [2020-07-20 21:37:23,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:23,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47875391] [2020-07-20 21:37:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:24,260 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:24,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:24,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:37:24,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 321 proven. 952 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-20 21:37:24,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:25,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 324 proven. 984 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-20 21:37:26,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47875391] [2020-07-20 21:37:26,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:26,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 21:37:26,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300483772] [2020-07-20 21:37:26,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:37:26,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:26,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:37:26,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:37:26,713 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 18 states. [2020-07-20 21:37:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:26,937 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2020-07-20 21:37:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:37:26,938 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-20 21:37:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:26,940 INFO L225 Difference]: With dead ends: 105 [2020-07-20 21:37:26,940 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 21:37:26,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:37:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 21:37:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-07-20 21:37:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 21:37:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-07-20 21:37:26,949 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 298 [2020-07-20 21:37:26,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:26,949 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-07-20 21:37:26,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:37:26,950 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-07-20 21:37:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-20 21:37:26,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:26,953 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:27,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:27,168 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:27,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2133540566, now seen corresponding path program 19 times [2020-07-20 21:37:27,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:27,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225290178] [2020-07-20 21:37:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:27,492 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:27,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:27,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:37:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 328 proven. 1119 refuted. 0 times theorem prover too weak. 3533 trivial. 0 not checked. [2020-07-20 21:37:27,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:29,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 322 proven. 1176 refuted. 0 times theorem prover too weak. 3482 trivial. 0 not checked. [2020-07-20 21:37:30,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225290178] [2020-07-20 21:37:30,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:30,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 21:37:30,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459191838] [2020-07-20 21:37:30,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:37:30,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:30,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:37:30,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:37:30,846 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 20 states. [2020-07-20 21:37:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:31,198 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-07-20 21:37:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:37:31,199 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 298 [2020-07-20 21:37:31,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:31,201 INFO L225 Difference]: With dead ends: 138 [2020-07-20 21:37:31,201 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:37:31,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:37:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:37:31,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:37:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:37:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:37:31,207 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 298 [2020-07-20 21:37:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:31,208 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:37:31,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:37:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:37:31,208 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:37:31,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:31,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:37:31,804 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 40 [2020-07-20 21:37:31,984 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 46 [2020-07-20 21:37:33,507 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 320 DAG size of output: 131 [2020-07-20 21:37:34,499 WARN L193 SmtUtils]: Spent 990.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:37:35,260 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 131 [2020-07-20 21:37:36,130 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:37:36,954 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 131 [2020-07-20 21:37:37,095 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 79 [2020-07-20 21:37:38,039 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:37:38,839 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 131 [2020-07-20 21:37:39,237 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 94 [2020-07-20 21:37:39,391 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 81 [2020-07-20 21:37:39,561 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 78 [2020-07-20 21:37:40,369 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:37:40,612 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 83 [2020-07-20 21:37:41,376 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 131 [2020-07-20 21:37:42,235 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 131 [2020-07-20 21:37:42,989 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 131 [2020-07-20 21:37:43,227 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 94 [2020-07-20 21:37:43,729 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 120 [2020-07-20 21:37:43,894 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 78 [2020-07-20 21:37:44,775 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:37:45,590 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 131 [2020-07-20 21:37:46,348 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 131 [2020-07-20 21:37:47,192 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:37:47,972 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 131 [2020-07-20 21:37:48,123 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 78 [2020-07-20 21:37:48,931 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 131 [2020-07-20 21:37:49,671 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 131 [2020-07-20 21:37:49,781 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 68 [2020-07-20 21:37:49,976 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 78 [2020-07-20 21:37:50,171 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 85 [2020-07-20 21:37:50,973 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 131 [2020-07-20 21:37:51,786 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:37:52,314 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 123 [2020-07-20 21:37:52,564 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 78 [2020-07-20 21:37:53,287 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 131 [2020-07-20 21:37:54,113 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:37:54,862 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 131 [2020-07-20 21:37:55,011 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 78 [2020-07-20 21:37:55,790 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 131 [2020-07-20 21:37:56,673 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 131 [2020-07-20 21:37:57,513 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 134 [2020-07-20 21:37:58,253 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 134 [2020-07-20 21:37:59,237 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 126 [2020-07-20 21:37:59,385 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 78 [2020-07-20 21:38:00,266 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 131 [2020-07-20 21:38:01,072 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 131 [2020-07-20 21:38:01,341 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 99 [2020-07-20 21:38:02,129 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 131 [2020-07-20 21:38:02,933 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:38:03,790 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:38:04,712 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 131 [2020-07-20 21:38:05,521 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 131 [2020-07-20 21:38:05,678 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 78 [2020-07-20 21:38:06,523 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:38:07,317 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 131 [2020-07-20 21:38:07,618 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 103 [2020-07-20 21:38:08,481 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 135 [2020-07-20 21:38:09,363 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:38:09,656 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 78 [2020-07-20 21:38:09,953 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 103 [2020-07-20 21:38:10,755 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 131 [2020-07-20 21:38:11,605 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:38:11,761 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 78 [2020-07-20 21:38:12,600 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 131 [2020-07-20 21:38:12,753 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 78 [2020-07-20 21:38:13,636 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 131 [2020-07-20 21:38:13,787 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 79 [2020-07-20 21:38:16,683 WARN L193 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 284 DAG size of output: 39 [2020-07-20 21:38:16,713 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:38:16,713 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:38:16,713 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:38:16,713 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:38:16,714 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:38:16,714 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:38:16,714 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-20 21:38:16,714 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-20 21:38:16,714 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-20 21:38:16,714 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-20 21:38:16,715 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 7 main_~x~0) (<= main_~x~0 7)) [2020-07-20 21:38:16,715 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-20 21:38:16,715 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-20 21:38:16,715 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-20 21:38:16,715 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-20 21:38:16,715 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-20 21:38:16,715 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-20 21:38:16,715 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (<= 2 |fibo_#in~n|)) [2020-07-20 21:38:16,716 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-20 21:38:16,716 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (let ((.cse0 (<= |fibo_#in~n| fibo_~n))) (or (and .cse0 (= |fibo_#t~ret0| 8)) (and (<= |fibo_#in~n| 6) .cse0) (and .cse0 (<= 8 |fibo_#in~n|)))) (or (and (<= 5 |fibo_#in~n|) (<= |fibo_#in~n| 5) (= |fibo_#t~ret0| 3)) (and (= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|)) (and (<= 4 |fibo_#in~n|) (= |fibo_#t~ret0| 2) (<= |fibo_#in~n| 4)) (and (= |fibo_#t~ret0| 1) (<= |fibo_#in~n| 3)) (<= 7 |fibo_#in~n|)) (<= 2 |fibo_#in~n|)) [2020-07-20 21:38:16,716 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-20 21:38:16,716 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-20 21:38:16,716 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-20 21:38:16,716 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-20 21:38:16,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:38:16 BoogieIcfgContainer [2020-07-20 21:38:16,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:38:16,724 INFO L168 Benchmark]: Toolchain (without parser) took 115538.05 ms. Allocated memory was 136.8 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 100.8 MB in the beginning and 178.2 MB in the end (delta: -77.5 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2020-07-20 21:38:16,725 INFO L168 Benchmark]: CDTParser took 0.90 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 21:38:16,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 448.72 ms. Allocated memory is still 136.8 MB. Free memory was 100.5 MB in the beginning and 91.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:38:16,725 INFO L168 Benchmark]: Boogie Preprocessor took 42.28 ms. Allocated memory is still 136.8 MB. Free memory was 91.4 MB in the beginning and 89.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:38:16,726 INFO L168 Benchmark]: RCFGBuilder took 492.16 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 89.8 MB in the beginning and 170.0 MB in the end (delta: -80.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:38:16,726 INFO L168 Benchmark]: TraceAbstraction took 114544.38 ms. Allocated memory was 201.9 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 169.3 MB in the beginning and 178.2 MB in the end (delta: -8.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2020-07-20 21:38:16,728 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.90 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 448.72 ms. Allocated memory is still 136.8 MB. Free memory was 100.5 MB in the beginning and 91.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.28 ms. Allocated memory is still 136.8 MB. Free memory was 91.4 MB in the beginning and 89.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 492.16 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 89.8 MB in the beginning and 170.0 MB in the end (delta: -80.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 114544.38 ms. Allocated memory was 201.9 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 169.3 MB in the beginning and 178.2 MB in the end (delta: -8.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 69.1s, OverallIterations: 27, TraceHistogramMax: 53, AutomataDifference: 7.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 45.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 695 SDtfs, 850 SDslu, 3167 SDs, 0 SdLazy, 3655 SolverSat, 1161 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11932 GetRequests, 11162 SyntacticMatches, 280 SemanticMatches, 490 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred in iteration=23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 27 MinimizatonAttempts, 525 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 278 PreInvPairs, 11077 NumberOfFragments, 89 HoareAnnotationTreeSize, 278 FomulaSimplifications, 1545027492 FormulaSimplificationTreeSizeReduction, 42.4s HoareSimplificationTime, 8 FomulaSimplificationsInter, 489033 FormulaSimplificationTreeSizeReductionInter, 2.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 50.5s InterpolantComputationTime, 5922 NumberOfCodeBlocks, 4534 NumberOfCodeBlocksAsserted, 79 NumberOfCheckSat, 11765 ConstructedInterpolants, 0 QuantifiedInterpolants, 5098563 SizeOfPredicates, 155 NumberOfNonLiveVariables, 11255 ConjunctsInSsa, 485 ConjunctsInUnsatCore, 52 InterpolantComputations, 2 PerfectInterpolantSequences, 160306/193848 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...