/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/loop-lit/jm2006.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:25:17,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:25:17,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:25:17,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:25:17,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:25:17,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:25:17,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:25:17,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:25:17,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:25:17,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:25:17,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:25:17,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:25:17,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:25:17,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:25:17,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:25:17,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:25:17,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:25:17,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:25:17,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:25:17,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:25:17,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:25:17,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:25:17,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:25:17,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:25:17,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:25:17,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:25:17,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:25:17,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:25:17,876 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 23:25:17,898 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:25:17,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:25:17,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:25:17,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:25:17,902 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:25:17,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:25:17,902 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:25:17,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:25:17,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:25:17,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:25:17,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:25:17,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:25:17,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:25:17,904 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:25:17,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:25:17,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:25:17,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:25:17,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:25:17,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:25:17,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:25:17,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:25:17,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:25:17,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:25:17,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:25:17,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:25:17,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:25:17,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:17,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:25:17,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:25:17,909 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 23:25:18,269 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:25:18,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:25:18,301 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:25:18,302 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:25:18,303 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:25:18,304 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-21 23:25:18,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8eeef6f/95428688ed4d439d8ee42087b0ba913b/FLAGf22665f27 [2020-07-21 23:25:18,887 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:25:18,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-21 23:25:18,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8eeef6f/95428688ed4d439d8ee42087b0ba913b/FLAGf22665f27 [2020-07-21 23:25:19,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8eeef6f/95428688ed4d439d8ee42087b0ba913b [2020-07-21 23:25:19,249 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:25:19,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:25:19,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:25:19,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:25:19,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:25:19,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:25:19" (1/1) ... [2020-07-21 23:25:19,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b47dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:19, skipping insertion in model container [2020-07-21 23:25:19,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:25:19" (1/1) ... [2020-07-21 23:25:19,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:25:19,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:25:19,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:25:19,494 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:25:19,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:25:19,530 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:25:19,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:19 WrapperNode [2020-07-21 23:25:19,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:25:19,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:25:19,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:25:19,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:25:19,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:19" (1/1) ... [2020-07-21 23:25:19,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:19" (1/1) ... [2020-07-21 23:25:19,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:19" (1/1) ... [2020-07-21 23:25:19,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:19" (1/1) ... [2020-07-21 23:25:19,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:19" (1/1) ... [2020-07-21 23:25:19,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:19" (1/1) ... [2020-07-21 23:25:19,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:19" (1/1) ... [2020-07-21 23:25:19,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:25:19,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:25:19,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:25:19,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:25:19,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:19" (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 23:25:19,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:25:19,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:25:19,725 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:25:19,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:25:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:25:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:25:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:25:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:25:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:25:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:25:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:25:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:25:20,014 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:25:20,014 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 23:25:20,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:25:20 BoogieIcfgContainer [2020-07-21 23:25:20,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:25:20,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:25:20,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:25:20,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:25:20,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:25:19" (1/3) ... [2020-07-21 23:25:20,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70da295b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:25:20, skipping insertion in model container [2020-07-21 23:25:20,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:19" (2/3) ... [2020-07-21 23:25:20,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70da295b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:25:20, skipping insertion in model container [2020-07-21 23:25:20,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:25:20" (3/3) ... [2020-07-21 23:25:20,036 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.c.i.v+cfa-reducer.c [2020-07-21 23:25:20,050 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:25:20,074 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:25:20,088 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:25:20,114 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:25:20,114 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:25:20,114 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:25:20,115 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:25:20,115 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:25:20,115 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:25:20,115 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:25:20,115 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:25:20,135 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 23:25:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 23:25:20,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:20,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:20,143 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:20,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1434042835, now seen corresponding path program 1 times [2020-07-21 23:25:20,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:20,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145741798] [2020-07-21 23:25:20,160 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 23:25:20,234 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:25:20,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:20,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:25:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:20,345 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:25:20,349 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:25:20,366 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 23:25:20,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:25:20,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145741798] [2020-07-21 23:25:20,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:25:20,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:25:20,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778966783] [2020-07-21 23:25:20,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:25:20,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:20,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:25:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:25:20,389 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-07-21 23:25:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:20,531 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 23:25:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:25:20,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-21 23:25:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:20,544 INFO L225 Difference]: With dead ends: 30 [2020-07-21 23:25:20,545 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 23:25:20,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:25:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 23:25:20,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 23:25:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 23:25:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 23:25:20,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-21 23:25:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:20,587 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 23:25:20,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:25:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 23:25:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 23:25:20,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:20,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:20,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:20,804 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:20,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1507594220, now seen corresponding path program 1 times [2020-07-21 23:25:20,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:20,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307503507] [2020-07-21 23:25:20,806 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 23:25:20,849 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:25:20,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:20,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 23:25:20,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:20,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:25:20,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:25:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:21,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307503507] [2020-07-21 23:25:21,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:21,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-21 23:25:21,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395966742] [2020-07-21 23:25:21,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 23:25:21,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:21,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 23:25:21,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:25:21,010 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2020-07-21 23:25:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:21,201 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-21 23:25:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 23:25:21,202 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-07-21 23:25:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:21,203 INFO L225 Difference]: With dead ends: 23 [2020-07-21 23:25:21,203 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 23:25:21,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-21 23:25:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 23:25:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 23:25:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 23:25:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 23:25:21,211 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-21 23:25:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:21,211 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 23:25:21,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 23:25:21,212 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 23:25:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:25:21,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:21,213 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:21,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:21,428 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:21,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2102853613, now seen corresponding path program 2 times [2020-07-21 23:25:21,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:21,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701741984] [2020-07-21 23:25:21,431 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 23:25:21,472 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:25:21,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:21,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 23:25:21,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:21,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:25:21,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:25:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:21,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701741984] [2020-07-21 23:25:21,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:21,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 23:25:21,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815589200] [2020-07-21 23:25:21,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 23:25:21,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:21,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 23:25:21,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-07-21 23:25:21,748 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 15 states. [2020-07-21 23:25:22,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:22,216 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 23:25:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 23:25:22,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2020-07-21 23:25:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:22,218 INFO L225 Difference]: With dead ends: 29 [2020-07-21 23:25:22,218 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 23:25:22,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-07-21 23:25:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 23:25:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 23:25:22,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 23:25:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-21 23:25:22,227 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-21 23:25:22,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:22,227 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-21 23:25:22,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 23:25:22,228 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-21 23:25:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 23:25:22,229 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:22,229 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:22,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:22,444 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:22,446 INFO L82 PathProgramCache]: Analyzing trace with hash 906772109, now seen corresponding path program 3 times [2020-07-21 23:25:22,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:22,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444361464] [2020-07-21 23:25:22,447 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 23:25:22,522 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:25:22,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:22,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-21 23:25:22,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:22,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:25:22,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:25:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:23,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444361464] [2020-07-21 23:25:23,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:23,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-07-21 23:25:23,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459106870] [2020-07-21 23:25:23,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 23:25:23,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:23,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 23:25:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2020-07-21 23:25:23,222 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 27 states. [2020-07-21 23:25:23,839 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-07-21 23:25:24,146 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-07-21 23:25:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:24,884 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 23:25:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 23:25:24,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 22 [2020-07-21 23:25:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:24,895 INFO L225 Difference]: With dead ends: 41 [2020-07-21 23:25:24,895 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 23:25:24,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=550, Invalid=1172, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 23:25:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 23:25:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 23:25:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 23:25:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-21 23:25:24,916 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-21 23:25:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:24,916 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-21 23:25:24,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 23:25:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-21 23:25:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 23:25:24,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:24,920 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:25,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:25,134 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:25,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1007922227, now seen corresponding path program 4 times [2020-07-21 23:25:25,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:25,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549394274] [2020-07-21 23:25:25,136 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 23:25:25,210 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:25:25,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:25,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-21 23:25:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:25,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:25:25,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:25:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:27,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549394274] [2020-07-21 23:25:27,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:27,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2020-07-21 23:25:27,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142904851] [2020-07-21 23:25:27,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-21 23:25:27,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:27,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-21 23:25:27,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2020-07-21 23:25:27,329 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 51 states. [2020-07-21 23:25:28,234 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 23:25:28,597 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 23:25:28,951 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-07-21 23:25:29,315 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 23:25:29,694 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 100 [2020-07-21 23:25:29,997 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 23:25:30,277 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 23:25:30,570 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 23:25:30,842 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 23:25:31,110 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 23:25:31,357 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 23:25:34,123 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 23:25:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:34,135 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-21 23:25:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-21 23:25:34,138 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 34 [2020-07-21 23:25:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:34,139 INFO L225 Difference]: With dead ends: 65 [2020-07-21 23:25:34,140 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 23:25:34,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1942, Invalid=4064, Unknown=0, NotChecked=0, Total=6006 [2020-07-21 23:25:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 23:25:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 23:25:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 23:25:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-21 23:25:34,169 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-21 23:25:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:34,169 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-21 23:25:34,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-21 23:25:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-21 23:25:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 23:25:34,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:34,183 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:34,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:34,384 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:34,385 INFO L82 PathProgramCache]: Analyzing trace with hash -765796787, now seen corresponding path program 5 times [2020-07-21 23:25:34,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:34,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095411482] [2020-07-21 23:25:34,386 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 23:25:34,495 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:25:34,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 195 conjunts are in the unsatisfiable core [2020-07-21 23:25:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:36,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:25:36,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:25:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:42,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095411482] [2020-07-21 23:25:42,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:42,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 99 [2020-07-21 23:25:42,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121167266] [2020-07-21 23:25:42,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-07-21 23:25:42,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:42,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-07-21 23:25:42,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2407, Invalid=7295, Unknown=0, NotChecked=0, Total=9702 [2020-07-21 23:25:42,534 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 99 states. [2020-07-21 23:25:45,830 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-21 23:25:47,152 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 23:25:48,090 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 194 [2020-07-21 23:25:49,414 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 23:25:50,397 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 196 [2020-07-21 23:25:51,668 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-21 23:25:52,886 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-07-21 23:25:54,052 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-21 23:25:55,219 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-21 23:25:56,458 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-21 23:25:57,591 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-21 23:25:58,694 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-21 23:25:59,742 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-21 23:26:00,764 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 23:26:01,792 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-21 23:26:02,774 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 23:26:03,747 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 23:26:04,685 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-21 23:26:05,623 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 23:26:06,529 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-21 23:26:07,424 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 23:26:08,329 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 23:26:09,183 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 23:26:10,003 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 23:26:10,817 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 23:26:11,569 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-21 23:26:12,315 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 23:26:13,035 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 23:26:13,732 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 23:26:14,407 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 23:26:15,068 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 23:26:15,714 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 23:26:16,326 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 23:26:16,919 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 23:26:17,485 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 23:26:18,033 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 23:26:19,059 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 23:26:24,577 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 23:26:24,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:26:24,591 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2020-07-21 23:26:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-21 23:26:24,593 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 58 [2020-07-21 23:26:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:26:24,595 INFO L225 Difference]: With dead ends: 113 [2020-07-21 23:26:24,596 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 23:26:24,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 46.7s TimeCoverageRelationStatistics Valid=7318, Invalid=15032, Unknown=0, NotChecked=0, Total=22350 [2020-07-21 23:26:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 23:26:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-21 23:26:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 23:26:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-21 23:26:24,624 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-21 23:26:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:26:24,625 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-21 23:26:24,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-07-21 23:26:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-21 23:26:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-21 23:26:24,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:26:24,627 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:26:24,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:26:24,833 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:26:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:26:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1152480077, now seen corresponding path program 6 times [2020-07-21 23:26:24,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:26:24,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923657567] [2020-07-21 23:26:24,835 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 23:26:25,043 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:26:25,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:26:25,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 387 conjunts are in the unsatisfiable core [2020-07-21 23:26:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:26:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:26:34,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:26:34,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:27:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:05,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923657567] [2020-07-21 23:27:05,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:27:05,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 195 [2020-07-21 23:27:05,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037370536] [2020-07-21 23:27:05,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 195 states [2020-07-21 23:27:05,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:27:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2020-07-21 23:27:05,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9415, Invalid=28415, Unknown=0, NotChecked=0, Total=37830 [2020-07-21 23:27:05,257 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 195 states. [2020-07-21 23:27:24,648 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 482 [2020-07-21 23:27:33,416 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 477 [2020-07-21 23:27:36,824 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 480 DAG size of output: 386 [2020-07-21 23:27:45,631 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 472 [2020-07-21 23:27:49,084 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 482 DAG size of output: 388 [2020-07-21 23:27:58,311 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 467 [2020-07-21 23:28:07,742 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 462 [2020-07-21 23:28:17,813 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-21 23:28:28,639 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 452 [2020-07-21 23:28:39,269 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 447 [2020-07-21 23:28:50,411 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 442 [2020-07-21 23:29:02,374 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 437 [2020-07-21 23:29:15,336 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification that was a NOOP. DAG size: 432 [2020-07-21 23:29:29,285 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification that was a NOOP. DAG size: 427 [2020-07-21 23:29:44,528 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 422 [2020-07-21 23:30:00,789 WARN L193 SmtUtils]: Spent 2.74 s on a formula simplification that was a NOOP. DAG size: 417 [2020-07-21 23:30:19,166 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification that was a NOOP. DAG size: 412 [2020-07-21 23:30:36,836 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification that was a NOOP. DAG size: 407 [2020-07-21 23:30:54,049 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification that was a NOOP. DAG size: 402 [2020-07-21 23:31:10,475 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-21 23:31:27,034 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 392 [2020-07-21 23:31:44,023 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 387 [2020-07-21 23:32:02,367 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-21 23:32:20,433 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 377 [2020-07-21 23:32:39,229 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification that was a NOOP. DAG size: 372 [2020-07-21 23:32:58,708 WARN L193 SmtUtils]: Spent 3.13 s on a formula simplification that was a NOOP. DAG size: 367 [2020-07-21 23:33:20,093 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification that was a NOOP. DAG size: 362 [2020-07-21 23:33:42,509 WARN L193 SmtUtils]: Spent 3.32 s on a formula simplification that was a NOOP. DAG size: 357 [2020-07-21 23:34:04,336 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-21 23:34:25,040 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-21 23:34:46,020 WARN L193 SmtUtils]: Spent 3.09 s on a formula simplification that was a NOOP. DAG size: 342 [2020-07-21 23:35:07,510 WARN L193 SmtUtils]: Spent 3.29 s on a formula simplification that was a NOOP. DAG size: 337 [2020-07-21 23:35:31,256 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification that was a NOOP. DAG size: 332 [2020-07-21 23:35:55,190 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification that was a NOOP. DAG size: 327 [2020-07-21 23:36:19,451 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification that was a NOOP. DAG size: 322 [2020-07-21 23:36:43,403 WARN L193 SmtUtils]: Spent 3.25 s on a formula simplification that was a NOOP. DAG size: 317 [2020-07-21 23:37:07,881 WARN L193 SmtUtils]: Spent 3.34 s on a formula simplification that was a NOOP. DAG size: 312 [2020-07-21 23:37:30,900 WARN L193 SmtUtils]: Spent 3.17 s on a formula simplification that was a NOOP. DAG size: 307 [2020-07-21 23:37:51,483 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 23:38:11,394 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 297 [2020-07-21 23:38:30,946 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 292 [2020-07-21 23:38:50,449 WARN L193 SmtUtils]: Spent 2.74 s on a formula simplification that was a NOOP. DAG size: 287 [2020-07-21 23:39:10,019 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 282 [2020-07-21 23:39:29,273 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 277