/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:36:24,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:36:24,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:36:24,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:36:24,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:36:24,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:36:24,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:36:24,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:36:24,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:36:24,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:36:24,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:36:24,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:36:24,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:36:24,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:36:24,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:36:24,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:36:24,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:36:24,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:36:24,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:36:24,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:36:24,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:36:24,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:36:24,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:36:24,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:36:24,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:36:24,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:36:24,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:36:24,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:36:24,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 20:36:24,667 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:36:24,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:36:24,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:36:24,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:36:24,670 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:36:24,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:36:24,670 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:36:24,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:36:24,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:36:24,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:36:24,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:36:24,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:36:24,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:36:24,672 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:36:24,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:36:24,672 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:36:24,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:36:24,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:36:24,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:36:24,673 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:36:24,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:36:24,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:36:24,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:36:24,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:36:24,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:36:24,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:36:24,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:24,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:36:24,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:36:24,675 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 -> 2 [2020-07-21 20:36:25,115 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:36:25,139 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:36:25,145 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:36:25,147 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:36:25,148 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:36:25,150 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-07-21 20:36:25,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/921ef929d/136ab421680d49a09f091d519f97c793/FLAGcffab618f [2020-07-21 20:36:25,867 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:36:25,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2020-07-21 20:36:25,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/921ef929d/136ab421680d49a09f091d519f97c793/FLAGcffab618f [2020-07-21 20:36:26,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/921ef929d/136ab421680d49a09f091d519f97c793 [2020-07-21 20:36:26,213 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:36:26,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:36:26,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:36:26,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:36:26,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:36:26,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:36:26" (1/1) ... [2020-07-21 20:36:26,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b88e092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:26, skipping insertion in model container [2020-07-21 20:36:26,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:36:26" (1/1) ... [2020-07-21 20:36:26,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:36:26,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:36:26,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:36:26,614 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:36:26,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:36:26,650 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:36:26,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:26 WrapperNode [2020-07-21 20:36:26,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:36:26,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:36:26,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:36:26,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:36:26,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:26" (1/1) ... [2020-07-21 20:36:26,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:26" (1/1) ... [2020-07-21 20:36:26,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:26" (1/1) ... [2020-07-21 20:36:26,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:26" (1/1) ... [2020-07-21 20:36:26,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:26" (1/1) ... [2020-07-21 20:36:26,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:26" (1/1) ... [2020-07-21 20:36:26,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:26" (1/1) ... [2020-07-21 20:36:26,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:36:26,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:36:26,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:36:26,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:36:26,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:36:26,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:36:26,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:36:26,906 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:36:26,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:36:26,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:36:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:36:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:36:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:36:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:36:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:36:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:36:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:36:26,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:36:27,189 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:36:27,189 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:36:27,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:36:27 BoogieIcfgContainer [2020-07-21 20:36:27,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:36:27,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:36:27,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:36:27,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:36:27,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:36:26" (1/3) ... [2020-07-21 20:36:27,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e2de80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:36:27, skipping insertion in model container [2020-07-21 20:36:27,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:26" (2/3) ... [2020-07-21 20:36:27,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e2de80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:36:27, skipping insertion in model container [2020-07-21 20:36:27,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:36:27" (3/3) ... [2020-07-21 20:36:27,209 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-07-21 20:36:27,226 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:36:27,238 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:36:27,259 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:36:27,294 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:36:27,294 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:36:27,294 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:36:27,294 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:36:27,295 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:36:27,295 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:36:27,295 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:36:27,295 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:36:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 20:36:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 20:36:27,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:27,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:27,332 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:27,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:27,340 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-07-21 20:36:27,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:27,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089872870] [2020-07-21 20:36:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:27,445 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:36:27,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:27,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 20:36:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:27,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:36:27,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089872870] [2020-07-21 20:36:27,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:36:27,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 20:36:27,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967668489] [2020-07-21 20:36:27,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 20:36:27,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:27,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 20:36:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 20:36:27,534 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-21 20:36:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:27,600 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-21 20:36:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 20:36:27,604 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 20:36:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:27,619 INFO L225 Difference]: With dead ends: 33 [2020-07-21 20:36:27,619 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 20:36:27,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 20:36:27,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 20:36:27,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 20:36:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 20:36:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-21 20:36:27,716 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-07-21 20:36:27,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:27,717 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-21 20:36:27,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 20:36:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-21 20:36:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 20:36:27,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:27,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:27,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:27,940 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash -971473804, now seen corresponding path program 1 times [2020-07-21 20:36:27,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:27,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281138824] [2020-07-21 20:36:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:27,982 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:36:27,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:27,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:36:27,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:28,086 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:36:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:28,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:36:28,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281138824] [2020-07-21 20:36:28,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:36:28,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 20:36:28,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659446443] [2020-07-21 20:36:28,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 20:36:28,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:28,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 20:36:28,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:36:28,141 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-07-21 20:36:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:28,295 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-21 20:36:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:36:28,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-07-21 20:36:28,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:28,301 INFO L225 Difference]: With dead ends: 26 [2020-07-21 20:36:28,301 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 20:36:28,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:36:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 20:36:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-07-21 20:36:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 20:36:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 20:36:28,314 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-07-21 20:36:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:28,314 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 20:36:28,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 20:36:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 20:36:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 20:36:28,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:28,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:28,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:28,531 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:28,532 INFO L82 PathProgramCache]: Analyzing trace with hash -18708286, now seen corresponding path program 1 times [2020-07-21 20:36:28,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:28,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692883584] [2020-07-21 20:36:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:28,573 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:36:28,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:28,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 20:36:28,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:28,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:36:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:28,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692883584] [2020-07-21 20:36:28,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:36:28,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-07-21 20:36:28,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045574311] [2020-07-21 20:36:28,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 20:36:28,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:28,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 20:36:28,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-21 20:36:28,742 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2020-07-21 20:36:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:28,930 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-07-21 20:36:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 20:36:28,931 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-07-21 20:36:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:28,933 INFO L225 Difference]: With dead ends: 31 [2020-07-21 20:36:28,933 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 20:36:28,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:36:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 20:36:28,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-07-21 20:36:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 20:36:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 20:36:28,942 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-07-21 20:36:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:28,942 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 20:36:28,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 20:36:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 20:36:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 20:36:28,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:28,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:29,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:29,158 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:29,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:29,160 INFO L82 PathProgramCache]: Analyzing trace with hash 154986550, now seen corresponding path program 1 times [2020-07-21 20:36:29,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:29,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471320259] [2020-07-21 20:36:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:29,203 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:36:29,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:29,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 20:36:29,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:29,337 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:36:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:29,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:36:29,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:36:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:29,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471320259] [2020-07-21 20:36:29,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:36:29,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-21 20:36:29,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510836601] [2020-07-21 20:36:29,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 20:36:29,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:29,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 20:36:29,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-21 20:36:29,807 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 17 states. [2020-07-21 20:36:30,346 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-21 20:36:30,528 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2020-07-21 20:36:30,989 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2020-07-21 20:36:31,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:31,258 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-21 20:36:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 20:36:31,259 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-07-21 20:36:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:31,260 INFO L225 Difference]: With dead ends: 46 [2020-07-21 20:36:31,261 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 20:36:31,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-07-21 20:36:31,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 20:36:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-21 20:36:31,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 20:36:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-21 20:36:31,272 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-07-21 20:36:31,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:31,272 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-21 20:36:31,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 20:36:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-21 20:36:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 20:36:31,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:31,274 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:31,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:31,491 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:31,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1027624830, now seen corresponding path program 2 times [2020-07-21 20:36:31,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:31,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292549645] [2020-07-21 20:36:31,494 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:31,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:36:31,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:31,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 20:36:31,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:31,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:36:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-21 20:36:31,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292549645] [2020-07-21 20:36:31,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:36:31,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2020-07-21 20:36:31,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658782296] [2020-07-21 20:36:31,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 20:36:31,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:31,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 20:36:31,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-07-21 20:36:31,877 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 17 states. [2020-07-21 20:36:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:32,325 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-21 20:36:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 20:36:32,329 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-07-21 20:36:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:32,331 INFO L225 Difference]: With dead ends: 48 [2020-07-21 20:36:32,332 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 20:36:32,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-07-21 20:36:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 20:36:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-07-21 20:36:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 20:36:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-07-21 20:36:32,355 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2020-07-21 20:36:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:32,360 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-07-21 20:36:32,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 20:36:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-07-21 20:36:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 20:36:32,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:32,362 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:32,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:32,574 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:32,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:32,575 INFO L82 PathProgramCache]: Analyzing trace with hash -490417350, now seen corresponding path program 3 times [2020-07-21 20:36:32,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:32,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592215655] [2020-07-21 20:36:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:32,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:36:32,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:32,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 20:36:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:32,822 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:36:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:32,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:36:32,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:36:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:33,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592215655] [2020-07-21 20:36:33,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:36:33,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2020-07-21 20:36:33,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193741962] [2020-07-21 20:36:33,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 20:36:33,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:33,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 20:36:33,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-07-21 20:36:33,777 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2020-07-21 20:36:34,721 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-07-21 20:36:34,965 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-07-21 20:36:35,124 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-07-21 20:36:35,331 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-07-21 20:36:35,850 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-07-21 20:36:36,124 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:36:36,325 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-21 20:36:36,563 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 20:36:36,756 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-07-21 20:36:37,016 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-07-21 20:36:37,218 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-07-21 20:36:37,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:37,604 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-07-21 20:36:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 20:36:37,605 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2020-07-21 20:36:37,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:37,607 INFO L225 Difference]: With dead ends: 62 [2020-07-21 20:36:37,607 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 20:36:37,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=578, Invalid=2392, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 20:36:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 20:36:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-21 20:36:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 20:36:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-07-21 20:36:37,628 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 29 [2020-07-21 20:36:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:37,629 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-07-21 20:36:37,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 20:36:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-07-21 20:36:37,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 20:36:37,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:37,632 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:37,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:37,846 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:37,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:37,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2033682622, now seen corresponding path program 4 times [2020-07-21 20:36:37,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:37,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97394437] [2020-07-21 20:36:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:37,894 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:36:37,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:37,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-21 20:36:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:38,554 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:36:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:38,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:36:38,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:36:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:41,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97394437] [2020-07-21 20:36:41,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:36:41,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-07-21 20:36:41,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938095805] [2020-07-21 20:36:41,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-21 20:36:41,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:41,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-21 20:36:41,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 20:36:41,780 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2020-07-21 20:36:43,579 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 20:36:44,026 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-21 20:36:44,237 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-07-21 20:36:44,645 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 20:36:45,053 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 20:36:45,291 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:36:45,549 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:36:45,797 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:36:46,052 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:36:46,301 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:36:46,583 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:36:46,835 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 20:36:47,263 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:36:47,506 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:36:47,791 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:36:48,058 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:36:48,351 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 20:36:48,618 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-07-21 20:36:48,911 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 20:36:49,183 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 20:36:49,458 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 20:36:49,727 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 20:36:50,034 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 20:36:50,289 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 20:36:50,613 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 20:36:50,923 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 20:36:51,214 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:36:51,501 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:36:51,840 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 20:36:52,242 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 20:36:52,585 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 20:36:52,884 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 20:36:53,190 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 20:36:53,501 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 20:36:53,852 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 20:36:54,138 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 20:36:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:54,777 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-07-21 20:36:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-21 20:36:54,779 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2020-07-21 20:36:54,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:54,781 INFO L225 Difference]: With dead ends: 114 [2020-07-21 20:36:54,781 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 20:36:54,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=2424, Invalid=9786, Unknown=0, NotChecked=0, Total=12210 [2020-07-21 20:36:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 20:36:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-07-21 20:36:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 20:36:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-07-21 20:36:54,808 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 53 [2020-07-21 20:36:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:54,808 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-07-21 20:36:54,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-21 20:36:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-07-21 20:36:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-21 20:36:54,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:54,813 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:55,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:55,020 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:55,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1181026478, now seen corresponding path program 5 times [2020-07-21 20:36:55,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:55,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772148576] [2020-07-21 20:36:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:55,109 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:36:55,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:55,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 98 conjunts are in the unsatisfiable core [2020-07-21 20:36:55,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:57,993 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:36:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:36:58,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:36:58,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:37:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:37:11,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772148576] [2020-07-21 20:37:11,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:37:11,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 101 [2020-07-21 20:37:11,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3178339] [2020-07-21 20:37:11,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-21 20:37:11,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:37:11,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-21 20:37:11,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=7951, Unknown=0, NotChecked=0, Total=10100 [2020-07-21 20:37:11,405 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2020-07-21 20:37:19,576 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 20:37:20,106 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 20:37:20,437 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-21 20:37:20,930 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-21 20:37:21,701 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 20:37:22,048 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:37:22,429 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:22,712 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:37:23,067 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:23,396 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:23,795 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:24,109 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 20:37:24,492 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:24,794 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:37:25,152 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:37:25,500 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:37:25,914 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 20:37:26,272 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 20:37:26,644 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 20:37:26,955 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 20:37:27,305 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:27,621 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:28,000 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:28,397 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:37:28,827 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:29,172 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:37:29,567 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:29,864 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:30,203 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:30,559 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:37:30,956 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:31,319 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:37:31,665 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:32,026 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:32,442 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:32,828 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:37:33,218 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:33,551 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:37:33,933 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:34,283 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:34,695 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:35,097 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:37:35,481 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:35,816 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:37:36,212 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:36,577 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:36,989 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:37,491 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:37:37,932 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:38,288 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:37:38,701 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:39,090 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:39,526 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:39,953 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:37:40,375 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:40,743 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:37:41,182 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:41,592 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:42,052 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:42,631 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:37:43,088 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:37:43,436 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:37:43,935 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:44,363 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:37:44,865 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 20:37:45,378 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 20:37:45,832 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 20:37:46,224 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:37:46,708 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 20:37:47,116 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 20:37:47,602 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 20:37:48,102 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 20:37:48,632 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 20:37:49,090 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 20:37:49,700 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:37:50,210 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:37:50,799 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 20:37:51,493 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 20:37:52,161 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 20:37:52,749 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 20:37:53,336 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 20:37:53,885 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 20:37:54,583 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 20:37:55,314 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 20:37:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:37:56,569 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2020-07-21 20:37:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2020-07-21 20:37:56,571 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2020-07-21 20:37:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:37:56,574 INFO L225 Difference]: With dead ends: 218 [2020-07-21 20:37:56,574 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 20:37:56,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12145 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=10004, Invalid=39502, Unknown=0, NotChecked=0, Total=49506 [2020-07-21 20:37:56,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 20:37:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 20:37:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 20:37:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2020-07-21 20:37:56,613 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 101 [2020-07-21 20:37:56,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:37:56,614 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2020-07-21 20:37:56,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-21 20:37:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2020-07-21 20:37:56,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-21 20:37:56,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:37:56,618 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:37:56,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:37:56,829 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:37:56,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:37:56,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1984747378, now seen corresponding path program 6 times [2020-07-21 20:37:56,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:37:56,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667216015] [2020-07-21 20:37:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:37:56,944 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:37:56,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:37:56,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 194 conjunts are in the unsatisfiable core [2020-07-21 20:37:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:38:08,793 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:38:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:38:09,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:38:09,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:39:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:39:14,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667216015] [2020-07-21 20:39:14,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:39:14,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 197 [2020-07-21 20:39:14,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876132760] [2020-07-21 20:39:14,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2020-07-21 20:39:14,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:39:14,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2020-07-21 20:39:14,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8621, Invalid=29991, Unknown=0, NotChecked=0, Total=38612 [2020-07-21 20:39:14,990 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 197 states. [2020-07-21 20:40:06,550 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-07-21 20:40:07,374 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-07-21 20:40:08,814 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 20:40:10,026 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 20:40:10,980 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-21 20:40:12,108 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-07-21 20:40:12,969 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-21 20:40:14,037 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 20:40:15,119 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 20:40:16,379 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 20:40:17,988 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:40:19,298 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:40:20,479 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:40:21,787 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:40:23,140 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:40:24,606 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:40:26,372 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 20:40:27,743 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:40:28,894 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:40:30,588 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:40:31,802 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:40:33,318 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 20:40:35,303 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 20:40:36,842 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 20:40:38,085 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 20:40:39,359 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:40:40,657 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:40:42,133 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:40:43,722 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:40:45,039 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:40:46,163 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:40:47,523 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:40:48,837 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:40:50,194 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:40:51,878 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:40:53,634 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:40:54,998 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:40:56,701 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:40:58,082 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:40:59,650 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:01,800 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:41:03,448 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:04,896 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:41:06,483 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:07,929 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:09,560 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:11,366 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:41:12,912 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:14,339 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:41:15,983 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:17,535 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:19,196 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:21,094 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:41:22,402 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:23,549 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:41:25,443 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:26,813 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:28,378 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:30,353 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:41:31,823 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:33,083 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:41:34,680 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:36,301 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:38,128 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:40,242 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:41:41,815 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:43,175 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:41:45,052 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:46,594 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:48,216 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:50,436 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:41:52,128 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:41:53,590 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:41:55,258 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:56,905 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:41:58,819 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:01,059 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:42:02,563 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:03,861 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:42:05,483 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:42:06,903 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:42:08,710 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:10,965 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:42:12,551 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:13,875 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:42:15,530 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:42:16,946 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:42:18,890 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:21,298 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:42:23,341 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:25,144 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:42:27,277 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:42:29,065 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:42:31,267 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:33,720 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:42:35,455 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:36,923 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:42:38,591 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:42:40,205 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:42:42,036 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:44,364 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:42:46,319 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:48,031 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:42:49,906 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:42:51,486 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:42:53,175 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:55,620 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:42:57,168 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:42:58,492 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:43:00,297 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:43:01,945 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:43:03,974 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:43:06,327 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:43:08,114 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:43:09,706 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:43:11,808 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:43:13,449 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:43:15,459 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:43:17,987 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:43:20,081 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:43:21,880 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:43:23,940 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:43:25,630 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:43:27,717 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:43:30,167 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:43:32,409 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:43:34,282 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:43:36,374 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:43:38,069 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:43:39,962 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:43:42,456 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:43:44,716 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:43:46,623 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:43:48,691 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:43:50,655 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:43:52,909 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:43:55,929 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:43:57,774 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:43:59,377 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:44:02,072 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:44:04,116 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:44:06,484 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:44:09,405 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:44:11,610 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:44:13,603 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:44:15,809 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:44:18,094 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:44:20,576 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:44:23,643 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:44:26,154 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:44:28,307 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:44:30,863 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:44:33,062 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:44:35,600 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:44:38,623 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:44:40,959 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:44:43,066 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:44:45,642 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:44:47,915 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:44:50,519 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:44:53,670 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 20:44:55,730 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 20:44:57,527 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:44:59,770 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:45:01,916 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 20:45:04,580 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 20:45:07,898 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 20:45:10,387 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 20:45:12,559 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 20:45:15,381 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 20:45:17,328 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 20:45:19,874 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 20:45:22,773 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 20:45:25,698 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 20:45:28,203 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 20:45:31,007 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:45:33,609 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 20:45:36,485 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 20:45:39,789 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 20:45:42,978 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 20:45:45,505 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 20:45:48,347 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 20:45:50,872 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 20:45:53,786 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 20:45:57,508 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 20:45:58,801 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 20:45:59,799 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 20:46:01,602 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 20:46:03,791 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-07-21 20:46:03,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:46:03,870 INFO L93 Difference]: Finished difference Result 426 states and 457 transitions. [2020-07-21 20:46:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2020-07-21 20:46:03,880 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 197 [2020-07-21 20:46:03,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:46:03,884 INFO L225 Difference]: With dead ends: 426 [2020-07-21 20:46:03,884 INFO L226 Difference]: Without dead ends: 390 [2020-07-21 20:46:03,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50369 ImplicationChecksByTransitivity, 428.2s TimeCoverageRelationStatistics Valid=40716, Invalid=158646, Unknown=0, NotChecked=0, Total=199362 [2020-07-21 20:46:03,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-07-21 20:46:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2020-07-21 20:46:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-07-21 20:46:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 390 transitions. [2020-07-21 20:46:03,963 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 390 transitions. Word has length 197 [2020-07-21 20:46:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:46:03,964 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 390 transitions. [2020-07-21 20:46:03,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 197 states. [2020-07-21 20:46:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 390 transitions. [2020-07-21 20:46:03,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-21 20:46:03,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:46:03,973 INFO L422 BasicCegarLoop]: trace histogram [126, 126, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:46:04,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:46:04,187 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:46:04,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:46:04,188 INFO L82 PathProgramCache]: Analyzing trace with hash -354150478, now seen corresponding path program 7 times [2020-07-21 20:46:04,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:46:04,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463295104] [2020-07-21 20:46:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:46:04,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:46:04,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:46:04,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 386 conjunts are in the unsatisfiable core [2020-07-21 20:46:04,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:48:19,209 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:48:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 23751 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:48:23,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:48:26,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:48:35,427 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 20:48:38,064 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 20:48:40,693 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 20:48:43,382 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 20:48:46,086 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 20:48:48,745 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 20:48:51,543 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 20:48:54,079 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 20:48:56,420 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:48:58,825 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:01,249 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:03,589 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:06,073 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:08,384 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:10,653 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:13,103 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:15,481 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:17,935 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:20,497 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:22,908 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:25,370 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:28,043 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:30,586 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:33,169 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:35,988 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:38,609 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:41,285 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:44,079 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:46,699 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:49,356 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:52,246 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:54,743 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:49:57,247 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:00,098 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:02,828 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:05,556 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:08,391 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:11,027 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:13,592 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:16,238 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:18,890 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:21,587 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:24,483 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:27,089 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:29,671 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:32,587 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 20:50:35,155 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 24