/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/nla-digbench/mannadiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:43:01,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:43:01,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:43:01,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:43:01,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:43:01,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:43:01,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:43:01,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:43:01,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:43:01,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:43:01,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:43:01,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:43:01,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:43:01,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:43:01,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:43:01,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:43:01,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:43:01,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:43:01,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:43:01,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:43:01,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:43:01,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:43:01,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:43:01,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:43:01,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:43:01,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:43:01,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:43:01,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:43:01,814 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 23:43:01,849 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:43:01,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:43:01,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:43:01,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:43:01,855 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:43:01,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:43:01,855 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:43:01,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:43:01,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:43:01,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:43:01,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:43:01,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:43:01,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:43:01,856 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:43:01,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:43:01,856 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:43:01,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:43:01,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:43:01,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:43:01,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:43:01,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:43:01,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:43:01,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:43:01,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:43:01,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:43:01,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:43:01,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:01,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:43:01,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:43:01,859 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 23:43:02,138 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:43:02,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:43:02,155 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:43:02,156 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:43:02,157 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:43:02,158 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-21 23:43:02,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac905e599/1ebb834a94ab4e0f898bda9db3c56a95/FLAG4499ecce1 [2020-07-21 23:43:02,673 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:43:02,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-21 23:43:02,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac905e599/1ebb834a94ab4e0f898bda9db3c56a95/FLAG4499ecce1 [2020-07-21 23:43:03,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac905e599/1ebb834a94ab4e0f898bda9db3c56a95 [2020-07-21 23:43:03,052 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:43:03,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:43:03,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:43:03,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:43:03,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:43:03,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:43:03" (1/1) ... [2020-07-21 23:43:03,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cafcdd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:43:03, skipping insertion in model container [2020-07-21 23:43:03,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:43:03" (1/1) ... [2020-07-21 23:43:03,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:43:03,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:43:03,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:43:03,332 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:43:03,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:43:03,366 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:43:03,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:43:03 WrapperNode [2020-07-21 23:43:03,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:43:03,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:43:03,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:43:03,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:43:03,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:43:03" (1/1) ... [2020-07-21 23:43:03,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:43:03" (1/1) ... [2020-07-21 23:43:03,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:43:03" (1/1) ... [2020-07-21 23:43:03,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:43:03" (1/1) ... [2020-07-21 23:43:03,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:43:03" (1/1) ... [2020-07-21 23:43:03,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:43:03" (1/1) ... [2020-07-21 23:43:03,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:43:03" (1/1) ... [2020-07-21 23:43:03,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:43:03,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:43:03,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:43:03,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:43:03,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:43:03" (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 23:43:03,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:43:03,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:43:03,549 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:43:03,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:43:03,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:43:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:43:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:43:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:43:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:43:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:43:03,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:43:03,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:43:03,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:43:03,756 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:43:03,756 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:43:03,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:43:03 BoogieIcfgContainer [2020-07-21 23:43:03,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:43:03,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:43:03,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:43:03,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:43:03,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:43:03" (1/3) ... [2020-07-21 23:43:03,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9d9d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:43:03, skipping insertion in model container [2020-07-21 23:43:03,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:43:03" (2/3) ... [2020-07-21 23:43:03,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9d9d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:43:03, skipping insertion in model container [2020-07-21 23:43:03,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:43:03" (3/3) ... [2020-07-21 23:43:03,769 INFO L109 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2020-07-21 23:43:03,781 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:43:03,789 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:43:03,808 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:43:03,840 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:43:03,840 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:43:03,841 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:43:03,841 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:43:03,841 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:43:03,841 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:43:03,841 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:43:03,841 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:43:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-21 23:43:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 23:43:03,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:03,897 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:03,898 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:03,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-07-21 23:43:03,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:03,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929813000] [2020-07-21 23:43:03,931 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 23:43:04,005 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:43:04,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:04,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:43:04,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 23:43:04,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:43:04,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929813000] [2020-07-21 23:43:04,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:43:04,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:43:04,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135378230] [2020-07-21 23:43:04,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:43:04,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:04,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:43:04,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:43:04,061 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-21 23:43:04,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:04,085 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-21 23:43:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:43:04,086 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 23:43:04,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:04,099 INFO L225 Difference]: With dead ends: 50 [2020-07-21 23:43:04,099 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 23:43:04,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:43:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 23:43:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 23:43:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 23:43:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-21 23:43:04,138 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-07-21 23:43:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:04,139 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-21 23:43:04,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:43:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-21 23:43:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 23:43:04,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:04,141 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:04,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:04,342 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:04,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-07-21 23:43:04,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:04,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629715153] [2020-07-21 23:43:04,346 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 23:43:04,387 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:04,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:04,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 23:43:04,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 23:43:04,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:43:04,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629715153] [2020-07-21 23:43:04,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:43:04,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 23:43:04,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502010804] [2020-07-21 23:43:04,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:43:04,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:04,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:43:04,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:43:04,515 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 8 states. [2020-07-21 23:43:04,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:04,663 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-21 23:43:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:43:04,664 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-07-21 23:43:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:04,667 INFO L225 Difference]: With dead ends: 34 [2020-07-21 23:43:04,667 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 23:43:04,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:43:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 23:43:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-07-21 23:43:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 23:43:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-21 23:43:04,680 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-07-21 23:43:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:04,683 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-21 23:43:04,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:43:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-21 23:43:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 23:43:04,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:04,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:04,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:04,900 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:04,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1415100442, now seen corresponding path program 1 times [2020-07-21 23:43:04,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:04,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678913540] [2020-07-21 23:43:04,903 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 23:43:04,939 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:04,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:04,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 23:43:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 23:43:05,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:43:05,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:43:05,122 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 23:43:05,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:43:05,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:43:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 23:43:05,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678913540] [2020-07-21 23:43:05,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:43:05,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-21 23:43:05,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010884239] [2020-07-21 23:43:05,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 23:43:05,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:05,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 23:43:05,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:43:05,199 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-07-21 23:43:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:07,409 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-21 23:43:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:43:07,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 23:43:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:07,412 INFO L225 Difference]: With dead ends: 37 [2020-07-21 23:43:07,413 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 23:43:07,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-07-21 23:43:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 23:43:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-07-21 23:43:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 23:43:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-21 23:43:07,422 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 27 [2020-07-21 23:43:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:07,422 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-21 23:43:07,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 23:43:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-21 23:43:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 23:43:07,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:07,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:07,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:07,639 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:07,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1831429119, now seen corresponding path program 1 times [2020-07-21 23:43:07,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:07,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448992435] [2020-07-21 23:43:07,641 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 23:43:07,684 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:07,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:07,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 23:43:07,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 23:43:07,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:43:07,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:43:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 23:43:07,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448992435] [2020-07-21 23:43:07,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:43:07,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 23:43:07,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772791452] [2020-07-21 23:43:07,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:43:07,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:07,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:43:07,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:43:07,856 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-07-21 23:43:12,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:12,150 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-07-21 23:43:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:43:12,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-21 23:43:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:12,160 INFO L225 Difference]: With dead ends: 72 [2020-07-21 23:43:12,160 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 23:43:12,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:43:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 23:43:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-21 23:43:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 23:43:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-07-21 23:43:12,182 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 29 [2020-07-21 23:43:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:12,182 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-07-21 23:43:12,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:43:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-07-21 23:43:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 23:43:12,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:12,185 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:12,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:12,389 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash 802873865, now seen corresponding path program 1 times [2020-07-21 23:43:12,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:12,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355086024] [2020-07-21 23:43:12,391 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 23:43:12,443 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:12,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:12,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:43:12,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 23:43:12,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:43:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 23:43:12,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355086024] [2020-07-21 23:43:12,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:43:12,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 23:43:12,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048072156] [2020-07-21 23:43:12,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:43:12,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:12,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:43:12,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:43:12,523 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 6 states. [2020-07-21 23:43:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:12,604 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-07-21 23:43:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:43:12,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-07-21 23:43:12,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:12,607 INFO L225 Difference]: With dead ends: 86 [2020-07-21 23:43:12,607 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 23:43:12,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:43:12,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 23:43:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-21 23:43:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 23:43:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-07-21 23:43:12,625 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 45 [2020-07-21 23:43:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:12,626 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-07-21 23:43:12,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:43:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-07-21 23:43:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 23:43:12,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:12,628 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:12,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:12,844 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash -208243385, now seen corresponding path program 2 times [2020-07-21 23:43:12,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:12,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563783135] [2020-07-21 23:43:12,846 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 23:43:12,882 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:12,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:12,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 23:43:12,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 23:43:13,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:43:13,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:43:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 23:43:13,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563783135] [2020-07-21 23:43:13,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:43:13,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-21 23:43:13,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599288721] [2020-07-21 23:43:13,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 23:43:13,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:13,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 23:43:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:43:13,319 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 12 states. [2020-07-21 23:43:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:24,086 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2020-07-21 23:43:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:43:24,120 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-07-21 23:43:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:24,124 INFO L225 Difference]: With dead ends: 124 [2020-07-21 23:43:24,124 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 23:43:24,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-07-21 23:43:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 23:43:24,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2020-07-21 23:43:24,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-21 23:43:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2020-07-21 23:43:24,159 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 45 [2020-07-21 23:43:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:24,159 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2020-07-21 23:43:24,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 23:43:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2020-07-21 23:43:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 23:43:24,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:24,162 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:24,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:24,363 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:24,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:24,364 INFO L82 PathProgramCache]: Analyzing trace with hash -53426768, now seen corresponding path program 2 times [2020-07-21 23:43:24,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:24,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231739077] [2020-07-21 23:43:24,365 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 23:43:24,403 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:24,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:24,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-21 23:43:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 23:43:24,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:43:24,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:43:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 23:43:25,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231739077] [2020-07-21 23:43:25,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:43:25,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 23:43:25,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190824597] [2020-07-21 23:43:25,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 23:43:25,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 23:43:25,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-07-21 23:43:25,113 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand 14 states. [2020-07-21 23:43:25,428 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-21 23:43:27,993 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-21 23:43:28,467 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-21 23:43:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:28,545 INFO L93 Difference]: Finished difference Result 156 states and 183 transitions. [2020-07-21 23:43:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 23:43:28,550 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-07-21 23:43:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:28,553 INFO L225 Difference]: With dead ends: 156 [2020-07-21 23:43:28,554 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 23:43:28,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-07-21 23:43:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 23:43:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-21 23:43:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 23:43:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2020-07-21 23:43:28,591 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 53 [2020-07-21 23:43:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:28,596 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2020-07-21 23:43:28,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 23:43:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2020-07-21 23:43:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 23:43:28,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:28,602 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:28,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:28,815 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:28,816 INFO L82 PathProgramCache]: Analyzing trace with hash 10333007, now seen corresponding path program 3 times [2020-07-21 23:43:28,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:28,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223144188] [2020-07-21 23:43:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:43:28,855 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:43:28,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:28,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 23:43:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 56 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-21 23:43:28,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:43:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-21 23:43:29,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223144188] [2020-07-21 23:43:29,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:43:29,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 23:43:29,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752568011] [2020-07-21 23:43:29,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:43:29,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:29,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:43:29,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:43:29,059 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand 8 states. [2020-07-21 23:43:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:29,181 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2020-07-21 23:43:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:43:29,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-07-21 23:43:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:29,188 INFO L225 Difference]: With dead ends: 152 [2020-07-21 23:43:29,188 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 23:43:29,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:43:29,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 23:43:29,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-07-21 23:43:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 23:43:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2020-07-21 23:43:29,212 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 61 [2020-07-21 23:43:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:29,212 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2020-07-21 23:43:29,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:43:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2020-07-21 23:43:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 23:43:29,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:29,214 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:29,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:29,429 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:29,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:29,429 INFO L82 PathProgramCache]: Analyzing trace with hash -185889457, now seen corresponding path program 4 times [2020-07-21 23:43:29,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:29,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905727210] [2020-07-21 23:43:29,431 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 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 23:43:29,468 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:29,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:29,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:43:29,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-21 23:43:29,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:43:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-21 23:43:29,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905727210] [2020-07-21 23:43:29,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:43:29,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 23:43:29,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012317211] [2020-07-21 23:43:29,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 23:43:29,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:29,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 23:43:29,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:43:29,626 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand 9 states. [2020-07-21 23:43:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:29,910 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2020-07-21 23:43:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:43:29,913 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-07-21 23:43:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:29,918 INFO L225 Difference]: With dead ends: 134 [2020-07-21 23:43:29,918 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 23:43:29,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:43:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 23:43:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-07-21 23:43:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 23:43:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2020-07-21 23:43:29,953 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 61 [2020-07-21 23:43:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:29,955 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2020-07-21 23:43:29,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 23:43:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2020-07-21 23:43:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 23:43:29,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:29,959 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:30,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:30,176 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:30,177 INFO L82 PathProgramCache]: Analyzing trace with hash -377856460, now seen corresponding path program 5 times [2020-07-21 23:43:30,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:30,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800984869] [2020-07-21 23:43:30,179 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 23:43:30,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:30,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 23:43:30,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-21 23:43:30,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:43:30,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:43:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-21 23:43:31,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800984869] [2020-07-21 23:43:31,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:43:31,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-07-21 23:43:31,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451606357] [2020-07-21 23:43:31,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 23:43:31,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:31,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 23:43:31,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-07-21 23:43:31,938 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand 18 states. [2020-07-21 23:43:32,857 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 23:43:33,358 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-07-21 23:43:33,631 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-07-21 23:43:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:36,042 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2020-07-21 23:43:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 23:43:36,045 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2020-07-21 23:43:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:36,047 INFO L225 Difference]: With dead ends: 140 [2020-07-21 23:43:36,047 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 23:43:36,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-07-21 23:43:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 23:43:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-07-21 23:43:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-21 23:43:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2020-07-21 23:43:36,060 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 69 [2020-07-21 23:43:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:36,060 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2020-07-21 23:43:36,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 23:43:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2020-07-21 23:43:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-21 23:43:36,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:36,061 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:36,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:36,263 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:36,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:36,263 INFO L82 PathProgramCache]: Analyzing trace with hash 728435349, now seen corresponding path program 6 times [2020-07-21 23:43:36,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:36,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872723624] [2020-07-21 23:43:36,264 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 23:43:36,311 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:36,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:36,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:43:36,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-21 23:43:36,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:43:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-21 23:43:36,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872723624] [2020-07-21 23:43:36,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:43:36,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-07-21 23:43:36,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313672703] [2020-07-21 23:43:36,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 23:43:36,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:36,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 23:43:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-07-21 23:43:36,533 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand 13 states. [2020-07-21 23:43:36,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:36,774 INFO L93 Difference]: Finished difference Result 148 states and 180 transitions. [2020-07-21 23:43:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 23:43:36,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-07-21 23:43:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:36,782 INFO L225 Difference]: With dead ends: 148 [2020-07-21 23:43:36,783 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 23:43:36,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 23:43:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 23:43:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-07-21 23:43:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 23:43:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2020-07-21 23:43:36,801 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 139 transitions. Word has length 77 [2020-07-21 23:43:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:36,803 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 139 transitions. [2020-07-21 23:43:36,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 23:43:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 139 transitions. [2020-07-21 23:43:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-21 23:43:36,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:36,805 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:37,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:37,015 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:37,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:37,016 INFO L82 PathProgramCache]: Analyzing trace with hash -323556203, now seen corresponding path program 7 times [2020-07-21 23:43:37,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:37,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789427330] [2020-07-21 23:43:37,018 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 23:43:37,058 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:37,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:37,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:43:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-21 23:43:37,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:43:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-21 23:43:37,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789427330] [2020-07-21 23:43:37,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:43:37,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-21 23:43:37,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80551819] [2020-07-21 23:43:37,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 23:43:37,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:37,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 23:43:37,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:43:37,249 INFO L87 Difference]: Start difference. First operand 116 states and 139 transitions. Second operand 12 states. [2020-07-21 23:43:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:43:37,490 INFO L93 Difference]: Finished difference Result 138 states and 162 transitions. [2020-07-21 23:43:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 23:43:37,493 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-07-21 23:43:37,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:43:37,494 INFO L225 Difference]: With dead ends: 138 [2020-07-21 23:43:37,494 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 23:43:37,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-07-21 23:43:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 23:43:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-07-21 23:43:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 23:43:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2020-07-21 23:43:37,508 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 77 [2020-07-21 23:43:37,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:43:37,508 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2020-07-21 23:43:37,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 23:43:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2020-07-21 23:43:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-21 23:43:37,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:43:37,510 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:43:37,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:37,723 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:43:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:43:37,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1534824776, now seen corresponding path program 8 times [2020-07-21 23:43:37,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:43:37,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913797458] [2020-07-21 23:43:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:43:37,774 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:43:37,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:43:37,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-21 23:43:37,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:43:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-07-21 23:43:38,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:43:39,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:43:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-07-21 23:43:41,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913797458] [2020-07-21 23:43:41,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:43:41,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 23:43:41,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293940503] [2020-07-21 23:43:41,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 23:43:41,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:43:41,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 23:43:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-07-21 23:43:41,430 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand 22 states. [2020-07-21 23:43:42,762 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 13 [2020-07-21 23:43:43,623 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 13 [2020-07-21 23:43:44,824 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-21 23:43:46,104 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 23:43:46,871 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 16 [2020-07-21 23:43:51,309 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2020-07-21 23:43:51,879 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 23:43:53,185 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 16 [2020-07-21 23:43:54,223 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 23:43:55,306 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 19 [2020-07-21 23:43:56,607 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 18 [2020-07-21 23:43:58,103 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 23:43:59,407 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 19 [2020-07-21 23:44:00,532 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 23:44:01,877 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 19 [2020-07-21 23:44:03,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:44:03,549 INFO L93 Difference]: Finished difference Result 240 states and 285 transitions. [2020-07-21 23:44:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-21 23:44:03,552 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2020-07-21 23:44:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:44:03,554 INFO L225 Difference]: With dead ends: 240 [2020-07-21 23:44:03,554 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 23:44:03,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 23:44:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 23:44:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 138. [2020-07-21 23:44:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-21 23:44:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2020-07-21 23:44:03,574 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 85 [2020-07-21 23:44:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:44:03,574 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2020-07-21 23:44:03,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 23:44:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2020-07-21 23:44:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-21 23:44:03,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:44:03,576 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:44:03,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:44:03,776 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:44:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:44:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2106989411, now seen corresponding path program 9 times [2020-07-21 23:44:03,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:44:03,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118179561] [2020-07-21 23:44:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:44:03,828 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:44:03,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:44:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-21 23:44:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:44:04,882 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:44:05,248 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:44:05,645 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:44:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 23:44:06,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:44:06,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:44:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 23:44:13,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118179561] [2020-07-21 23:44:13,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:44:13,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-07-21 23:44:13,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842816004] [2020-07-21 23:44:13,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 23:44:13,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:44:13,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 23:44:13,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-07-21 23:44:13,198 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand 24 states. [2020-07-21 23:44:16,214 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-21 23:44:17,027 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-07-21 23:44:17,857 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-21 23:44:18,928 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-21 23:44:22,851 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-21 23:44:23,982 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-21 23:44:27,212 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-07-21 23:44:28,846 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-07-21 23:44:30,080 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-07-21 23:44:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:44:30,228 INFO L93 Difference]: Finished difference Result 154 states and 177 transitions. [2020-07-21 23:44:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 23:44:30,235 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2020-07-21 23:44:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:44:30,236 INFO L225 Difference]: With dead ends: 154 [2020-07-21 23:44:30,236 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 23:44:30,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 23:44:30,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 23:44:30,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-07-21 23:44:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 23:44:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2020-07-21 23:44:30,249 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 93 [2020-07-21 23:44:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:44:30,250 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2020-07-21 23:44:30,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 23:44:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2020-07-21 23:44:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-21 23:44:30,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:44:30,251 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:44:30,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:44:30,462 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:44:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:44:30,463 INFO L82 PathProgramCache]: Analyzing trace with hash -178978853, now seen corresponding path program 10 times [2020-07-21 23:44:30,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:44:30,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161030176] [2020-07-21 23:44:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:44:30,507 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:44:30,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:44:30,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 23:44:30,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:44:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 76 proven. 104 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 23:44:30,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:44:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 76 proven. 104 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 23:44:30,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161030176] [2020-07-21 23:44:30,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:44:30,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2020-07-21 23:44:30,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161182056] [2020-07-21 23:44:30,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 23:44:30,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:44:30,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 23:44:30,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-07-21 23:44:30,755 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 15 states. [2020-07-21 23:44:31,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:44:31,054 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2020-07-21 23:44:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 23:44:31,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 93 [2020-07-21 23:44:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:44:31,061 INFO L225 Difference]: With dead ends: 126 [2020-07-21 23:44:31,062 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 23:44:31,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-07-21 23:44:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 23:44:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2020-07-21 23:44:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 23:44:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-07-21 23:44:31,070 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 93 [2020-07-21 23:44:31,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:44:31,071 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-07-21 23:44:31,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 23:44:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-07-21 23:44:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-21 23:44:31,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:44:31,072 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:44:31,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:44:31,273 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:44:31,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:44:31,274 INFO L82 PathProgramCache]: Analyzing trace with hash -837428226, now seen corresponding path program 11 times [2020-07-21 23:44:31,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:44:31,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164714643] [2020-07-21 23:44:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:44:31,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:44:31,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:44:31,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-21 23:44:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:44:33,696 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 23:44:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-21 23:44:34,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:44:34,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:44:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-21 23:44:44,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164714643] [2020-07-21 23:44:44,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:44:44,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2020-07-21 23:44:44,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779856414] [2020-07-21 23:44:44,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 23:44:44,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:44:44,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 23:44:44,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-07-21 23:44:44,065 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 26 states. [2020-07-21 23:44:46,270 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-21 23:44:47,367 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-07-21 23:44:48,293 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-07-21 23:44:53,012 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-07-21 23:44:54,120 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-21 23:44:56,591 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y1~0 c_main_~x2~0))) (and (= (+ (* 2 c_main_~y2~0) (* 4 c_main_~y1~0) c_main_~y3~0 (* c_main_~y2~0 c_main_~y1~0)) (+ c_main_~x1~0 1)) (= (+ c_main_~x1~0 4) (+ c_main_~x2~0 c_main_~y3~0 .cse0)) (= (+ c_main_~y2~0 c_main_~y3~0 .cse0) c_main_~x1~0))) is different from false [2020-07-21 23:44:59,660 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 23:45:05,971 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 23:45:12,847 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 23:45:22,599 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 23:46:05,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:46:05,832 INFO L93 Difference]: Finished difference Result 198 states and 236 transitions. [2020-07-21 23:46:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 23:46:05,837 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2020-07-21 23:46:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:46:05,839 INFO L225 Difference]: With dead ends: 198 [2020-07-21 23:46:05,839 INFO L226 Difference]: Without dead ends: 168 [2020-07-21 23:46:05,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 56.8s TimeCoverageRelationStatistics Valid=149, Invalid=1487, Unknown=8, NotChecked=78, Total=1722 [2020-07-21 23:46:05,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-21 23:46:05,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-07-21 23:46:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-21 23:46:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-07-21 23:46:05,861 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 101 [2020-07-21 23:46:05,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:46:05,862 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-07-21 23:46:05,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 23:46:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-07-21 23:46:05,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 23:46:05,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:46:05,864 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:46:06,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:46:06,065 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:46:06,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:46:06,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1126316255, now seen corresponding path program 12 times [2020-07-21 23:46:06,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:46:06,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16305134] [2020-07-21 23:46:06,067 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:46:06,112 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:46:06,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:46:06,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 23:46:06,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:46:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 104 proven. 160 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-07-21 23:46:06,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:46:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 104 proven. 160 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-07-21 23:46:06,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16305134] [2020-07-21 23:46:06,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:46:06,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2020-07-21 23:46:06,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657678804] [2020-07-21 23:46:06,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 23:46:06,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:46:06,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 23:46:06,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-07-21 23:46:06,454 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 18 states. [2020-07-21 23:46:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:46:07,398 INFO L93 Difference]: Finished difference Result 226 states and 271 transitions. [2020-07-21 23:46:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 23:46:07,409 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-07-21 23:46:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:46:07,411 INFO L225 Difference]: With dead ends: 226 [2020-07-21 23:46:07,411 INFO L226 Difference]: Without dead ends: 196 [2020-07-21 23:46:07,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 195 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2020-07-21 23:46:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-21 23:46:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-07-21 23:46:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-21 23:46:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 236 transitions. [2020-07-21 23:46:07,435 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 236 transitions. Word has length 109 [2020-07-21 23:46:07,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:46:07,436 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 236 transitions. [2020-07-21 23:46:07,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 23:46:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 236 transitions. [2020-07-21 23:46:07,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 23:46:07,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:46:07,438 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:46:07,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:46:07,639 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:46:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:46:07,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1251867972, now seen corresponding path program 13 times [2020-07-21 23:46:07,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:46:07,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772603311] [2020-07-21 23:46:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:46:07,692 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:46:07,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:46:07,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-21 23:46:07,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:46:07,974 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 23:46:08,191 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 23:46:08,426 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 23:46:08,681 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 23:46:08,964 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 23:46:09,380 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:46:09,815 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:46:10,308 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:46:10,875 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:46:11,458 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:46:12,315 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 23:46:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 24 proven. 288 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-07-21 23:46:13,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:46:14,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:46:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 24 proven. 288 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-07-21 23:46:34,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772603311] [2020-07-21 23:46:34,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:46:34,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2020-07-21 23:46:34,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453324152] [2020-07-21 23:46:34,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 23:46:34,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:46:34,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 23:46:34,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-07-21 23:46:34,826 INFO L87 Difference]: Start difference. First operand 196 states and 236 transitions. Second operand 30 states. [2020-07-21 23:47:12,846 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-21 23:47:14,864 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-07-21 23:47:16,539 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-07-21 23:47:36,158 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-07-21 23:47:50,379 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-07-21 23:47:59,981 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-21 23:48:53,906 WARN L193 SmtUtils]: Spent 5.67 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 23:49:05,668 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 23:49:19,359 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 23:49:38,940 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 23:49:53,948 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 23:50:06,675 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 23:50:33,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:33,051 INFO L93 Difference]: Finished difference Result 350 states and 421 transitions. [2020-07-21 23:50:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 23:50:33,058 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2020-07-21 23:50:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:33,061 INFO L225 Difference]: With dead ends: 350 [2020-07-21 23:50:33,061 INFO L226 Difference]: Without dead ends: 316 [2020-07-21 23:50:33,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 163.1s TimeCoverageRelationStatistics Valid=182, Invalid=2147, Unknown=23, NotChecked=0, Total=2352 [2020-07-21 23:50:33,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-07-21 23:50:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2020-07-21 23:50:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-07-21 23:50:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 379 transitions. [2020-07-21 23:50:33,098 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 379 transitions. Word has length 117 [2020-07-21 23:50:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:33,098 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 379 transitions. [2020-07-21 23:50:33,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 23:50:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 379 transitions. [2020-07-21 23:50:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-21 23:50:33,101 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:33,101 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:50:33,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:33,315 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:33,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:33,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1050066329, now seen corresponding path program 14 times [2020-07-21 23:50:33,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:33,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784106831] [2020-07-21 23:50:33,316 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:33,372 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:50:33,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:33,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 23:50:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 136 proven. 228 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-07-21 23:50:33,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:50:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 136 proven. 228 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-07-21 23:50:33,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784106831] [2020-07-21 23:50:33,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:50:33,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2020-07-21 23:50:33,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214354110] [2020-07-21 23:50:33,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 23:50:33,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:33,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 23:50:33,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-07-21 23:50:33,843 INFO L87 Difference]: Start difference. First operand 316 states and 379 transitions. Second operand 21 states. [2020-07-21 23:50:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:36,411 INFO L93 Difference]: Finished difference Result 386 states and 467 transitions. [2020-07-21 23:50:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 23:50:36,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2020-07-21 23:50:36,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:36,427 INFO L225 Difference]: With dead ends: 386 [2020-07-21 23:50:36,427 INFO L226 Difference]: Without dead ends: 352 [2020-07-21 23:50:36,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 223 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 23:50:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-07-21 23:50:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2020-07-21 23:50:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-21 23:50:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 427 transitions. [2020-07-21 23:50:36,467 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 427 transitions. Word has length 125 [2020-07-21 23:50:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:36,467 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 427 transitions. [2020-07-21 23:50:36,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 23:50:36,467 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 427 transitions. [2020-07-21 23:50:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-21 23:50:36,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:36,470 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:50:36,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:36,684 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:36,684 INFO L82 PathProgramCache]: Analyzing trace with hash 3461770, now seen corresponding path program 15 times [2020-07-21 23:50:36,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:36,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626160719] [2020-07-21 23:50:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:36,742 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:50:36,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:36,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-21 23:50:36,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:37,143 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 23:50:37,460 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 23:50:37,809 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 23:50:38,201 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 23:50:38,666 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 23:50:39,203 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 23:50:39,909 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:50:40,674 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:50:41,583 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:50:42,456 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:50:43,373 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:50:44,398 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 23:50:45,976 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 23:50:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 28 proven. 392 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 23:50:47,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:50:49,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:51:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 28 proven. 392 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 23:51:38,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626160719] [2020-07-21 23:51:38,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:51:38,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2020-07-21 23:51:38,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813574603] [2020-07-21 23:51:38,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 23:51:38,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:38,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 23:51:38,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 23:51:38,537 INFO L87 Difference]: Start difference. First operand 352 states and 427 transitions. Second operand 34 states. [2020-07-21 23:51:46,839 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y1~0 c_main_~x2~0))) (and (= (+ (* 2 c_main_~y2~0) (* 6 c_main_~y1~0) c_main_~y3~0 (* c_main_~y2~0 c_main_~y1~0)) (+ c_main_~x1~0 1)) (= (+ c_main_~x1~0 5) (+ c_main_~x2~0 c_main_~y3~0 .cse0)) (= (+ c_main_~y2~0 c_main_~y3~0 .cse0) c_main_~x1~0))) is different from false [2020-07-21 23:51:56,687 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 23:52:17,297 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 23:52:58,895 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 23:53:10,867 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 23:53:57,930 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 23:54:04,592 WARN L193 SmtUtils]: Spent 4.66 s on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 23:54:10,405 WARN L193 SmtUtils]: Spent 2.95 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-07-21 23:54:14,300 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-07-21 23:54:43,239 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 23:54:51,830 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-07-21 23:55:06,089 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2020-07-21 23:55:14,916 WARN L193 SmtUtils]: Spent 3.79 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-07-21 23:55:25,128 WARN L193 SmtUtils]: Spent 3.80 s on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-07-21 23:56:33,656 WARN L193 SmtUtils]: Spent 11.18 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 23:56:50,912 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 19