/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:02:52,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:02:52,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:02:52,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:02:52,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:02:52,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:02:52,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:02:52,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:02:52,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:02:52,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:02:52,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:02:52,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:02:52,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:02:52,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:02:52,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:02:52,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:02:52,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:02:52,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:02:52,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:02:52,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:02:52,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:02:52,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:02:52,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:02:52,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:02:52,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:02:52,804 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:02:52,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:02:52,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:02:52,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:02:52,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:02:52,820 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:02:52,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:02:52,821 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:02:52,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:02:52,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:02:52,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:02:52,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:02:52,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:02:52,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:02:52,824 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:02:52,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:02:52,825 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:02:52,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:02:52,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:02:52,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:02:52,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:02:52,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:02:52,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:02:52,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:02:52,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:02:52,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:02:52,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:02:52,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:52,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:02:52,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:02:52,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:02:53,118 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:02:53,131 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:02:53,135 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:02:53,136 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:02:53,137 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:02:53,137 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-21 22:02:53,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ca031d37/854483db85554b22b6e7b911f41b217c/FLAG0e2307bc7 [2020-07-21 22:02:53,674 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:02:53,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-21 22:02:53,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ca031d37/854483db85554b22b6e7b911f41b217c/FLAG0e2307bc7 [2020-07-21 22:02:54,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ca031d37/854483db85554b22b6e7b911f41b217c [2020-07-21 22:02:54,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:02:54,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:02:54,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:54,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:02:54,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:02:54,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:54" (1/1) ... [2020-07-21 22:02:54,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22ef5c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:54, skipping insertion in model container [2020-07-21 22:02:54,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:54" (1/1) ... [2020-07-21 22:02:54,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:02:54,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:02:54,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:54,302 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:02:54,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:54,333 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:02:54,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:54 WrapperNode [2020-07-21 22:02:54,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:54,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:02:54,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:02:54,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:02:54,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:54" (1/1) ... [2020-07-21 22:02:54,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:54" (1/1) ... [2020-07-21 22:02:54,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:54" (1/1) ... [2020-07-21 22:02:54,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:54" (1/1) ... [2020-07-21 22:02:54,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:54" (1/1) ... [2020-07-21 22:02:54,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:54" (1/1) ... [2020-07-21 22:02:54,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:54" (1/1) ... [2020-07-21 22:02:54,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:02:54,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:02:54,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:02:54,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:02:54,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:02:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:02:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:02:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 22:02:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:02:54,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:02:54,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:02:54,519 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 22:02:54,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:02:54,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:02:54,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:02:54,694 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:02:54,695 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:02:54,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:54 BoogieIcfgContainer [2020-07-21 22:02:54,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:02:54,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:02:54,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:02:54,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:02:54,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:02:54" (1/3) ... [2020-07-21 22:02:54,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71e6c8b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:54, skipping insertion in model container [2020-07-21 22:02:54,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:54" (2/3) ... [2020-07-21 22:02:54,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71e6c8b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:54, skipping insertion in model container [2020-07-21 22:02:54,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:54" (3/3) ... [2020-07-21 22:02:54,705 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2020-07-21 22:02:54,714 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:02:54,721 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:02:54,733 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:02:54,756 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:02:54,756 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:02:54,757 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:02:54,757 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:02:54,757 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:02:54,757 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:02:54,757 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:02:54,757 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:02:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 22:02:54,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:02:54,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:54,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:54,785 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:54,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-21 22:02:54,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:54,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947384660] [2020-07-21 22:02:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:54,873 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:02:54,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:54,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:02:54,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:02:54,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:54,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947384660] [2020-07-21 22:02:54,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:54,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:02:54,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770171879] [2020-07-21 22:02:54,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:02:54,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:55,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:02:55,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:02:55,004 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 22:02:55,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:55,119 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-21 22:02:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:02:55,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:02:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:55,132 INFO L225 Difference]: With dead ends: 36 [2020-07-21 22:02:55,132 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 22:02:55,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:02:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 22:02:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 22:02:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 22:02:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 22:02:55,182 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-21 22:02:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:55,183 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 22:02:55,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:02:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 22:02:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 22:02:55,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:55,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:55,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:55,399 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:55,401 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2020-07-21 22:02:55,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:55,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616049677] [2020-07-21 22:02:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:55,432 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:02:55,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:55,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:02:55,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:02:55,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:55,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616049677] [2020-07-21 22:02:55,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:55,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:02:55,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898223078] [2020-07-21 22:02:55,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:02:55,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:55,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:02:55,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:02:55,467 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-07-21 22:02:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:55,552 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-07-21 22:02:55,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:02:55,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 22:02:55,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:55,555 INFO L225 Difference]: With dead ends: 28 [2020-07-21 22:02:55,555 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 22:02:55,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:02:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 22:02:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-21 22:02:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 22:02:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 22:02:55,565 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-07-21 22:02:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:55,565 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 22:02:55,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:02:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 22:02:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:02:55,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:55,568 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:55,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:55,784 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:55,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-21 22:02:55,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:55,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854597087] [2020-07-21 22:02:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:55,828 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:55,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:55,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 22:02:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 22:02:55,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:55,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854597087] [2020-07-21 22:02:55,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:55,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 22:02:55,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675657738] [2020-07-21 22:02:55,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 22:02:55,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:55,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 22:02:55,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:02:55,880 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-07-21 22:02:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:55,966 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-07-21 22:02:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:02:55,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-21 22:02:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:55,969 INFO L225 Difference]: With dead ends: 39 [2020-07-21 22:02:55,969 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 22:02:55,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:02:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 22:02:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 22:02:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 22:02:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 22:02:55,978 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2020-07-21 22:02:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:55,979 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 22:02:55,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 22:02:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 22:02:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 22:02:55,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:55,981 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:56,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:56,195 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:56,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:56,196 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-07-21 22:02:56,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:56,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599357036] [2020-07-21 22:02:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:56,233 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:02:56,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:56,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:02:56,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:02:56,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:56,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:56,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 22:02:56,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599357036] [2020-07-21 22:02:56,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:56,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-07-21 22:02:56,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408933521] [2020-07-21 22:02:56,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:02:56,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:56,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:02:56,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:02:56,510 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2020-07-21 22:02:56,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:56,647 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2020-07-21 22:02:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:02:56,647 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-21 22:02:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:56,650 INFO L225 Difference]: With dead ends: 40 [2020-07-21 22:02:56,650 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 22:02:56,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:02:56,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 22:02:56,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 22:02:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 22:02:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2020-07-21 22:02:56,662 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 28 [2020-07-21 22:02:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:56,662 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2020-07-21 22:02:56,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:02:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2020-07-21 22:02:56,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 22:02:56,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:56,667 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:56,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:56,883 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1197309312, now seen corresponding path program 2 times [2020-07-21 22:02:56,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:56,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860360960] [2020-07-21 22:02:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:56,928 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:56,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:56,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:02:56,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 221 proven. 13 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-07-21 22:02:56,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:57,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 126 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-07-21 22:02:57,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860360960] [2020-07-21 22:02:57,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:57,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 22:02:57,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351968336] [2020-07-21 22:02:57,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:02:57,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:57,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:02:57,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:02:57,547 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand 11 states. [2020-07-21 22:02:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:57,708 INFO L93 Difference]: Finished difference Result 66 states and 114 transitions. [2020-07-21 22:02:57,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:02:57,708 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2020-07-21 22:02:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:57,710 INFO L225 Difference]: With dead ends: 66 [2020-07-21 22:02:57,711 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 22:02:57,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 171 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:02:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 22:02:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-07-21 22:02:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 22:02:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2020-07-21 22:02:57,722 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 94 [2020-07-21 22:02:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:57,723 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2020-07-21 22:02:57,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:02:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2020-07-21 22:02:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-21 22:02:57,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:57,725 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:57,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:57,932 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:57,933 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 3 times [2020-07-21 22:02:57,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:57,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330252163] [2020-07-21 22:02:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:57,992 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:02:57,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:57,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:02:57,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 170 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-07-21 22:02:58,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:58,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:58,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:58,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:58,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:58,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:58,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:58,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 182 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-21 22:02:59,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330252163] [2020-07-21 22:02:59,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:59,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:02:59,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8823261] [2020-07-21 22:02:59,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:02:59,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:59,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:02:59,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:02:59,009 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand 17 states. [2020-07-21 22:02:59,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:59,412 INFO L93 Difference]: Finished difference Result 79 states and 126 transitions. [2020-07-21 22:02:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:02:59,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-07-21 22:02:59,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:59,415 INFO L225 Difference]: With dead ends: 79 [2020-07-21 22:02:59,415 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 22:02:59,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:02:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 22:02:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-21 22:02:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:02:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2020-07-21 22:02:59,437 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 97 [2020-07-21 22:02:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:59,438 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2020-07-21 22:02:59,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:02:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2020-07-21 22:02:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 22:02:59,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:59,446 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:59,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:59,662 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash 946234379, now seen corresponding path program 4 times [2020-07-21 22:02:59,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:59,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912245432] [2020-07-21 22:02:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:59,724 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:02:59,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:02:59,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-21 22:02:59,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:00,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:00,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:00,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:00,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:00,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:00,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:00,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:00,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-07-21 22:03:00,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912245432] [2020-07-21 22:03:00,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:00,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2020-07-21 22:03:00,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926815302] [2020-07-21 22:03:00,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:03:00,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:00,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:03:00,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:03:00,758 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 16 states. [2020-07-21 22:03:00,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:00,959 INFO L93 Difference]: Finished difference Result 66 states and 96 transitions. [2020-07-21 22:03:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:03:00,960 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 110 [2020-07-21 22:03:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:00,967 INFO L225 Difference]: With dead ends: 66 [2020-07-21 22:03:00,967 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 22:03:00,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 196 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:03:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 22:03:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 22:03:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:03:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 89 transitions. [2020-07-21 22:03:00,979 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 89 transitions. Word has length 110 [2020-07-21 22:03:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:00,980 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 89 transitions. [2020-07-21 22:03:00,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:03:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 89 transitions. [2020-07-21 22:03:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-07-21 22:03:00,991 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:00,992 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 51, 31, 31, 31, 31, 31, 31, 31, 20, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:01,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:01,193 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1687252273, now seen corresponding path program 5 times [2020-07-21 22:03:01,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:01,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916895228] [2020-07-21 22:03:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:01,329 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:03:01,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:01,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:03:01,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10947 backedges. 5989 proven. 843 refuted. 0 times theorem prover too weak. 4115 trivial. 0 not checked. [2020-07-21 22:03:01,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:03,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:03,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:03,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10947 backedges. 672 proven. 2688 refuted. 0 times theorem prover too weak. 7587 trivial. 0 not checked. [2020-07-21 22:03:05,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916895228] [2020-07-21 22:03:05,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:05,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 22:03:05,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924901882] [2020-07-21 22:03:05,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:03:05,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:05,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:03:05,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:03:05,100 INFO L87 Difference]: Start difference. First operand 60 states and 89 transitions. Second operand 25 states. [2020-07-21 22:03:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:05,801 INFO L93 Difference]: Finished difference Result 143 states and 264 transitions. [2020-07-21 22:03:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 22:03:05,802 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 437 [2020-07-21 22:03:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:05,806 INFO L225 Difference]: With dead ends: 143 [2020-07-21 22:03:05,807 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 22:03:05,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 829 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 22:03:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 22:03:05,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2020-07-21 22:03:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 22:03:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2020-07-21 22:03:05,823 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 437 [2020-07-21 22:03:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:05,824 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2020-07-21 22:03:05,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:03:05,824 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2020-07-21 22:03:05,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-07-21 22:03:05,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:05,832 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 46, 28, 28, 28, 28, 28, 28, 28, 18, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:06,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:06,047 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:06,048 INFO L82 PathProgramCache]: Analyzing trace with hash 165459912, now seen corresponding path program 6 times [2020-07-21 22:03:06,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:06,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506242054] [2020-07-21 22:03:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:06,196 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:03:06,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:06,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:03:06,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8931 backedges. 1112 proven. 2209 refuted. 0 times theorem prover too weak. 5610 trivial. 0 not checked. [2020-07-21 22:03:06,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:08,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:08,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:08,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:08,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:08,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:08,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:08,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:09,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:09,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:09,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8931 backedges. 1112 proven. 2284 refuted. 0 times theorem prover too weak. 5535 trivial. 0 not checked. [2020-07-21 22:03:10,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506242054] [2020-07-21 22:03:10,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:10,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 22:03:10,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689145972] [2020-07-21 22:03:10,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 22:03:10,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 22:03:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:03:10,667 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 29 states. [2020-07-21 22:03:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:11,580 INFO L93 Difference]: Finished difference Result 183 states and 293 transitions. [2020-07-21 22:03:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 22:03:11,582 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 396 [2020-07-21 22:03:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:11,586 INFO L225 Difference]: With dead ends: 183 [2020-07-21 22:03:11,587 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 22:03:11,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 739 SyntacticMatches, 25 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 22:03:11,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 22:03:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-07-21 22:03:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 22:03:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 136 transitions. [2020-07-21 22:03:11,603 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 136 transitions. Word has length 396 [2020-07-21 22:03:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:11,604 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 136 transitions. [2020-07-21 22:03:11,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 22:03:11,605 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 136 transitions. [2020-07-21 22:03:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2020-07-21 22:03:11,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:11,613 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 75, 46, 46, 46, 46, 46, 46, 46, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:11,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:11,814 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:11,815 INFO L82 PathProgramCache]: Analyzing trace with hash -139440574, now seen corresponding path program 7 times [2020-07-21 22:03:11,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:11,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995772606] [2020-07-21 22:03:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:12,032 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:03:12,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 22:03:12,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24027 backedges. 2194 proven. 4514 refuted. 0 times theorem prover too weak. 17319 trivial. 0 not checked. [2020-07-21 22:03:12,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:15,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:15,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:16,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:16,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:16,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:16,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:17,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:18,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:18,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:18,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:18,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:18,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:18,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24027 backedges. 2194 proven. 4622 refuted. 0 times theorem prover too weak. 17211 trivial. 0 not checked. [2020-07-21 22:03:19,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995772606] [2020-07-21 22:03:19,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:19,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 33 [2020-07-21 22:03:19,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083361518] [2020-07-21 22:03:19,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 22:03:19,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:19,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 22:03:19,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:03:19,074 INFO L87 Difference]: Start difference. First operand 99 states and 136 transitions. Second operand 33 states. [2020-07-21 22:03:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:20,337 INFO L93 Difference]: Finished difference Result 221 states and 369 transitions. [2020-07-21 22:03:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 22:03:20,338 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 641 [2020-07-21 22:03:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:20,341 INFO L225 Difference]: With dead ends: 221 [2020-07-21 22:03:20,341 INFO L226 Difference]: Without dead ends: 131 [2020-07-21 22:03:20,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1312 GetRequests, 1221 SyntacticMatches, 29 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=987, Invalid=3045, Unknown=0, NotChecked=0, Total=4032 [2020-07-21 22:03:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-21 22:03:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2020-07-21 22:03:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-21 22:03:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 158 transitions. [2020-07-21 22:03:20,362 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 158 transitions. Word has length 641 [2020-07-21 22:03:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:20,363 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 158 transitions. [2020-07-21 22:03:20,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 22:03:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 158 transitions. [2020-07-21 22:03:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 22:03:20,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:20,367 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:20,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:20,580 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:20,581 INFO L82 PathProgramCache]: Analyzing trace with hash -211711407, now seen corresponding path program 8 times [2020-07-21 22:03:20,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:20,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430768825] [2020-07-21 22:03:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:20,861 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:20,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:03:20,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2270 refuted. 0 times theorem prover too weak. 9756 trivial. 0 not checked. [2020-07-21 22:03:21,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:23,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:23,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:23,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:24,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:24,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:24,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:24,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:24,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:24,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:24,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2347 refuted. 0 times theorem prover too weak. 9679 trivial. 0 not checked. [2020-07-21 22:03:24,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430768825] [2020-07-21 22:03:24,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:24,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 22:03:24,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023963225] [2020-07-21 22:03:24,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:03:24,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:24,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:03:24,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:03:24,870 INFO L87 Difference]: Start difference. First operand 113 states and 158 transitions. Second operand 20 states. [2020-07-21 22:03:25,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:25,158 INFO L93 Difference]: Finished difference Result 120 states and 169 transitions. [2020-07-21 22:03:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:03:25,158 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 464 [2020-07-21 22:03:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:25,165 INFO L225 Difference]: With dead ends: 120 [2020-07-21 22:03:25,165 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 22:03:25,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 892 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:03:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 22:03:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-07-21 22:03:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 22:03:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 165 transitions. [2020-07-21 22:03:25,188 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 165 transitions. Word has length 464 [2020-07-21 22:03:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:25,190 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 165 transitions. [2020-07-21 22:03:25,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:03:25,190 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 165 transitions. [2020-07-21 22:03:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 22:03:25,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:25,197 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:25,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:25,407 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:25,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:25,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 9 times [2020-07-21 22:03:25,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:25,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013046188] [2020-07-21 22:03:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:25,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:25,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:25,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 220 conjunts are in the unsatisfiable core [2020-07-21 22:03:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 22:03:26,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:28,077 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:03:28,284 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:03:28,473 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:03:28,661 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:03:29,967 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 22:03:30,356 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 22:03:30,756 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 22:03:31,174 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 22:03:32,669 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:03:32,847 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:03:33,031 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:03:33,215 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:03:34,190 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 22:03:35,140 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 22:03:36,102 WARN L193 SmtUtils]: Spent 954.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 22:03:37,097 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 22:03:38,086 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:03:38,701 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:03:38,893 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:03:39,089 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:03:39,285 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:03:40,713 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 22:03:41,141 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 22:03:41,567 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 22:03:41,994 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 22:03:44,411 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-21 22:03:46,947 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-21 22:03:49,509 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-21 22:03:52,068 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-21 22:03:53,103 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:03:53,208 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:03:53,320 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:03:53,432 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:03:54,186 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:03:54,410 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:03:54,643 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:03:54,878 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:03:55,753 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:03:55,863 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:03:55,982 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:03:56,095 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:03:56,581 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 22:03:57,069 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 22:03:57,592 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 22:03:58,104 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 22:03:58,685 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2020-07-21 22:03:59,213 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-07-21 22:03:59,719 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-07-21 22:04:00,166 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-07-21 22:04:00,594 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-07-21 22:04:01,077 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-07-21 22:04:01,550 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-07-21 22:04:02,027 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-07-21 22:04:02,464 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-07-21 22:04:02,902 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 22:04:03,337 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-07-21 22:04:03,747 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-07-21 22:04:04,149 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-07-21 22:04:04,550 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-07-21 22:04:04,944 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-07-21 22:04:05,327 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-07-21 22:04:05,702 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-07-21 22:04:06,094 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-07-21 22:04:06,461 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-07-21 22:04:06,806 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-07-21 22:04:07,156 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-07-21 22:04:07,497 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-07-21 22:04:07,831 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-21 22:04:08,162 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-07-21 22:04:08,486 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 22:04:08,802 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-07-21 22:04:09,118 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 22:04:09,421 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-07-21 22:04:09,720 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-07-21 22:04:10,005 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-21 22:04:10,280 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-07-21 22:04:10,549 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-07-21 22:04:10,816 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-07-21 22:04:11,072 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-07-21 22:04:11,331 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-07-21 22:04:11,570 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 22:04:11,807 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-07-21 22:04:12,038 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 22:04:12,259 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 22:04:12,474 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 22:04:12,676 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-07-21 22:04:12,888 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-07-21 22:04:13,083 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 22:04:13,270 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-07-21 22:04:13,446 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-21 22:04:13,624 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:04:13,800 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-07-21 22:04:13,985 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-07-21 22:04:14,157 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-21 22:04:14,312 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-07-21 22:04:14,460 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 22:04:14,603 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 22:04:14,739 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:04:14,874 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:04:15,000 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:04:15,121 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:04:15,238 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 22:04:15,344 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 22:04:17,676 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:17,808 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:17,940 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:18,087 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:18,227 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 22:04:18,358 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 22:04:18,483 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 22:04:18,600 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 22:04:18,713 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 22:04:18,823 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 22:04:18,927 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 22:04:23,160 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:04:23,268 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:04:23,377 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:04:23,955 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:24,101 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:24,255 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:24,400 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:25,400 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:04:25,668 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:04:25,936 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:04:26,220 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:04:30,105 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:30,244 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:30,394 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:30,541 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:34,252 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:34,384 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:34,526 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:34,669 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:35,727 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:04:36,009 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:04:36,310 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:04:36,600 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:04:37,922 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:38,067 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:38,210 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:38,364 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:38,924 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 22:04:39,480 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 22:04:40,132 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 22:04:40,797 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 22:04:42,399 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:42,632 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:42,891 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:43,116 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:44,350 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:04:44,645 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:04:44,931 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:04:45,217 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:04:46,521 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 22:04:47,822 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 22:04:49,156 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 22:04:50,503 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 22:04:52,171 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:52,329 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:04:52,500 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:52,667 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:04:53,935 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:04:54,247 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:04:54,649 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:04:55,074 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:04:55,497 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-21 22:04:55,860 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 22:04:56,190 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-07-21 22:04:56,498 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-07-21 22:04:56,805 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 22:04:57,101 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-21 22:04:57,423 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-07-21 22:04:57,752 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 22:04:58,095 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 22:04:58,437 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 22:04:58,775 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-07-21 22:04:59,080 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-21 22:04:59,320 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-21 22:04:59,557 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 22:04:59,785 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-21 22:05:00,022 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-07-21 22:05:00,236 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 22:05:00,446 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 22:05:00,642 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 22:05:00,837 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-21 22:05:01,024 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 22:05:01,205 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 22:05:01,373 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 22:05:01,536 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 22:05:01,695 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 22:05:01,836 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:05:01,984 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:05:02,112 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:02,240 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:05:02,360 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 22:05:02,483 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:05:02,590 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:05:07,647 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:07,811 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:07,995 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:08,168 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:12,993 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:13,154 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:13,325 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:13,506 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:14,433 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:05:14,555 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:05:14,691 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:14,823 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:15,226 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:05:15,577 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:05:15,926 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:05:16,240 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:05:17,044 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:05:17,259 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:17,895 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:18,078 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:18,263 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:18,467 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:19,259 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 22:05:20,104 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 22:05:20,767 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 22:05:21,448 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 22:05:22,343 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:05:22,545 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:22,657 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:23,335 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:23,514 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:23,696 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:23,885 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:24,083 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 22:05:24,256 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 22:05:24,431 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 22:05:24,594 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 22:05:24,750 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 22:05:24,896 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:05:25,044 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 22:05:25,188 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:05:25,320 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:05:25,439 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:05:25,552 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:05:25,659 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:05:25,771 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:05:28,339 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:30,701 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:31,403 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:31,570 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:31,746 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:31,930 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:32,968 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:33,310 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:05:33,638 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 22:05:33,985 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:05:34,336 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 22:05:35,281 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:05:35,394 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:35,502 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:35,611 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:05:35,813 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 22:05:39,188 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:05:39,392 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:39,519 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:40,292 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:40,544 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:05:40,745 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:40,941 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:05:42,851 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:05:43,057 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:05:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 22:05:44,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013046188] [2020-07-21 22:05:44,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:44,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 22:05:44,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030268914] [2020-07-21 22:05:44,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 22:05:44,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:44,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 22:05:44,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 22:05:44,653 INFO L87 Difference]: Start difference. First operand 116 states and 165 transitions. Second operand 36 states. [2020-07-21 22:05:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:45,592 INFO L93 Difference]: Finished difference Result 123 states and 178 transitions. [2020-07-21 22:05:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 22:05:45,597 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2020-07-21 22:05:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:45,599 INFO L225 Difference]: With dead ends: 123 [2020-07-21 22:05:45,599 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:05:45,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1502 GetRequests, 1301 SyntacticMatches, 164 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3526 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 22:05:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:05:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:05:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:05:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:05:45,606 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2020-07-21 22:05:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:45,606 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:05:45,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 22:05:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:05:45,606 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:05:45,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:45,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:05:47,057 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 7 [2020-07-21 22:05:48,685 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2020-07-21 22:05:48,691 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 22:05:48,692 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 22:05:48,692 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-21 22:05:48,692 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 22:05:48,692 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (<= 1 |fibonacci_#t~ret0|)) (.cse2 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse3 (<= 7 |fibonacci_#in~n|)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse0 (<= 3 fibonacci_~n) (<= |fibonacci_#in~n| 3) .cse1) (and .cse2 (<= |fibonacci_#in~n| 5) (<= 3 |fibonacci_#t~ret0|) (<= 5 |fibonacci_#in~n|) .cse1) (and .cse0 .cse2 (<= 2 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 2) .cse1) (and (<= 5 |fibonacci_#t~ret0|) .cse2 (<= |fibonacci_#in~n| 6) (<= 6 |fibonacci_#in~n|) .cse1) (and .cse2 (<= 8 |fibonacci_#t~ret0|) (<= fibonacci_~n 7) .cse3) (and .cse2 (<= |fibonacci_#in~n| 8) .cse3 .cse1 (<= 13 |fibonacci_#t~ret0|)) (and .cse2 (<= 2 |fibonacci_#t~ret0|) (<= 4 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 4) .cse1) (and .cse2 .cse3 (<= 21 |fibonacci_#t~ret0|) .cse1))) [2020-07-21 22:05:48,692 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 22:05:48,692 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-21 22:05:48,692 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-21 22:05:48,692 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-21 22:05:48,693 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:05:48,693 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:05:48,693 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:05:48,693 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:05:48,693 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:05:48,693 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:05:48,693 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-21 22:05:48,693 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-21 22:05:48,693 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-21 22:05:48,693 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-21 22:05:48,693 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-21 22:05:48,694 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-21 22:05:48,694 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-21 22:05:48,694 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-21 22:05:48,694 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-21 22:05:48,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:05:48 BoogieIcfgContainer [2020-07-21 22:05:48,700 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:05:48,701 INFO L168 Benchmark]: Toolchain (without parser) took 174604.14 ms. Allocated memory was 138.4 MB in the beginning and 620.2 MB in the end (delta: 481.8 MB). Free memory was 103.3 MB in the beginning and 327.1 MB in the end (delta: -223.8 MB). Peak memory consumption was 258.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:05:48,702 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 22:05:48,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.48 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 22:05:48,702 INFO L168 Benchmark]: Boogie Preprocessor took 27.55 ms. Allocated memory is still 138.4 MB. Free memory was 93.1 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:05:48,703 INFO L168 Benchmark]: RCFGBuilder took 336.79 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 168.7 MB in the end (delta: -77.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:05:48,703 INFO L168 Benchmark]: TraceAbstraction took 174000.06 ms. Allocated memory was 201.3 MB in the beginning and 620.2 MB in the end (delta: 418.9 MB). Free memory was 168.1 MB in the beginning and 327.1 MB in the end (delta: -159.0 MB). Peak memory consumption was 259.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:05:48,705 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.48 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.55 ms. Allocated memory is still 138.4 MB. Free memory was 93.1 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.79 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 168.7 MB in the end (delta: -77.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 174000.06 ms. Allocated memory was 201.3 MB in the beginning and 620.2 MB in the end (delta: 418.9 MB). Free memory was 168.1 MB in the beginning and 327.1 MB in the end (delta: -159.0 MB). Peak memory consumption was 259.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 171.0s, OverallIterations: 12, TraceHistogramMax: 109, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 308 SDtfs, 1075 SDslu, 1669 SDs, 0 SdLazy, 2081 SolverSat, 1243 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6205 GetRequests, 5608 SyntacticMatches, 288 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5947 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 44 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 209 PreInvPairs, 291 NumberOfFragments, 136 HoareAnnotationTreeSize, 209 FomulaSimplifications, 828 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2589 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 161.2s InterpolantComputationTime, 3073 NumberOfCodeBlocks, 2357 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 6069 ConstructedInterpolants, 0 QuantifiedInterpolants, 5484005 SizeOfPredicates, 82 NumberOfNonLiveVariables, 5252 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 148958/181608 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...