/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:16:42,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:16:42,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:16:42,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:16:42,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:16:42,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:16:42,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:16:42,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:16:42,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:16:42,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:16:42,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:16:42,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:16:42,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:16:42,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:16:42,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:16:42,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:16:42,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:16:42,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:16:42,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:16:42,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:16:42,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:16:42,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:16:42,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:16:42,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:16:42,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:16:42,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:16:42,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:16:42,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:16:42,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:16:42,815 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:16:42,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:16:42,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:16:42,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:16:42,817 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:16:42,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:16:42,818 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:16:42,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:16:42,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:16:42,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:16:42,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:16:42,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:16:42,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:16:42,819 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:16:42,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:16:42,820 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:16:42,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:16:42,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:16:42,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:16:42,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:16:42,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:16:42,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:16:42,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:16:42,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:16:42,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:16:42,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:16:42,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:42,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:16:42,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:16:42,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:16:43,126 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:16:43,142 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:16:43,146 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:16:43,148 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:16:43,148 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:16:43,149 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_15-1.c [2020-07-21 22:16:43,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8a98742/bc7781555b5f4d21ab7133b54549acba/FLAGff68e3491 [2020-07-21 22:16:43,718 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:16:43,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_15-1.c [2020-07-21 22:16:43,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8a98742/bc7781555b5f4d21ab7133b54549acba/FLAGff68e3491 [2020-07-21 22:16:44,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e8a98742/bc7781555b5f4d21ab7133b54549acba [2020-07-21 22:16:44,155 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:16:44,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:16:44,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:16:44,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:16:44,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:16:44,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:16:44" (1/1) ... [2020-07-21 22:16:44,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32242d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:44, skipping insertion in model container [2020-07-21 22:16:44,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:16:44" (1/1) ... [2020-07-21 22:16:44,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:16:44,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:16:44,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:16:44,458 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:16:44,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:16:44,490 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:16:44,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:44 WrapperNode [2020-07-21 22:16:44,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:16:44,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:16:44,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:16:44,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:16:44,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:44" (1/1) ... [2020-07-21 22:16:44,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:44" (1/1) ... [2020-07-21 22:16:44,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:44" (1/1) ... [2020-07-21 22:16:44,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:44" (1/1) ... [2020-07-21 22:16:44,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:44" (1/1) ... [2020-07-21 22:16:44,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:44" (1/1) ... [2020-07-21 22:16:44,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:44" (1/1) ... [2020-07-21 22:16:44,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:16:44,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:16:44,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:16:44,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:16:44,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:16:44,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:16:44,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:16:44,697 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 22:16:44,697 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 22:16:44,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:16:44,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:16:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:16:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 22:16:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 22:16:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:16:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:16:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:16:44,944 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:16:44,944 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:16:44,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:16:44 BoogieIcfgContainer [2020-07-21 22:16:44,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:16:44,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:16:44,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:16:44,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:16:44,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:16:44" (1/3) ... [2020-07-21 22:16:44,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9b24ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:16:44, skipping insertion in model container [2020-07-21 22:16:44,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:44" (2/3) ... [2020-07-21 22:16:44,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9b24ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:16:44, skipping insertion in model container [2020-07-21 22:16:44,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:16:44" (3/3) ... [2020-07-21 22:16:44,960 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-1.c [2020-07-21 22:16:44,973 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:16:44,983 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:16:45,020 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:16:45,095 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:16:45,095 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:16:45,096 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:16:45,096 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:16:45,097 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:16:45,098 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:16:45,098 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:16:45,098 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:16:45,123 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 22:16:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:16:45,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:45,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:45,132 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:45,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 22:16:45,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:45,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162242195] [2020-07-21 22:16:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:45,226 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:45,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:45,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:16:45,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:16:45,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:16:45,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162242195] [2020-07-21 22:16:45,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:16:45,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:16:45,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940728658] [2020-07-21 22:16:45,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:16:45,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:45,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:16:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:16:45,359 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 22:16:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:45,481 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 22:16:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:16:45,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:16:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:45,497 INFO L225 Difference]: With dead ends: 44 [2020-07-21 22:16:45,497 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:16:45,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:16:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:16:45,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:16:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:16:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:16:45,555 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 22:16:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:45,555 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:16:45,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:16:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:16:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:16:45,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:45,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:45,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:45,765 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:45,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:45,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 22:16:45,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:45,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779280829] [2020-07-21 22:16:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:45,811 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:16:45,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:16:45,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:16:45,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:16:45,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779280829] [2020-07-21 22:16:45,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:16:45,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:16:45,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658291056] [2020-07-21 22:16:45,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:16:45,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:45,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:16:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:16:45,867 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 22:16:45,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:45,979 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 22:16:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:16:45,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:16:45,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:45,982 INFO L225 Difference]: With dead ends: 36 [2020-07-21 22:16:45,982 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 22:16:45,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:16:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 22:16:45,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 22:16:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:16:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:16:45,994 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 22:16:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:45,995 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:16:45,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:16:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:16:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:16:45,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:45,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:46,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:46,202 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:46,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:46,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 22:16:46,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:46,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481606861] [2020-07-21 22:16:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:46,244 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:46,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:46,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:16:46,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:16:46,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:46,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:46,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:16:46,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481606861] [2020-07-21 22:16:46,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:46,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:16:46,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212724881] [2020-07-21 22:16:46,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:16:46,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:16:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:16:46,673 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 22:16:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:46,814 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 22:16:46,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:16:46,815 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 22:16:46,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:46,817 INFO L225 Difference]: With dead ends: 41 [2020-07-21 22:16:46,818 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 22:16:46,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:16:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 22:16:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 22:16:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:16:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:16:46,830 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 22:16:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:46,830 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:16:46,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:16:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:16:46,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:16:46,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:46,833 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:47,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:47,047 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:47,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:47,047 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 22:16:47,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:47,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128204540] [2020-07-21 22:16:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:47,083 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:47,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:47,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:16:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:16:47,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:47,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:47,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:16:47,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128204540] [2020-07-21 22:16:47,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:47,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:16:47,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537499540] [2020-07-21 22:16:47,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:16:47,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:47,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:16:47,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:16:47,390 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 22:16:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:47,547 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 22:16:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:16:47,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 22:16:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:47,550 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:16:47,550 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:16:47,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:16:47,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:16:47,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 22:16:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:16:47,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:16:47,561 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 22:16:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:47,562 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:16:47,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:16:47,562 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:16:47,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:16:47,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:47,564 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:47,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:47,781 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:47,782 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 22:16:47,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:47,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821556136] [2020-07-21 22:16:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:47,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:47,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:47,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:16:47,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:16:47,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:48,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:48,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:48,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:16:48,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821556136] [2020-07-21 22:16:48,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:48,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:16:48,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241112440] [2020-07-21 22:16:48,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:16:48,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:48,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:16:48,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:16:48,317 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 22:16:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:48,502 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 22:16:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:16:48,502 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 22:16:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:48,505 INFO L225 Difference]: With dead ends: 51 [2020-07-21 22:16:48,505 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 22:16:48,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:16:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 22:16:48,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 22:16:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:16:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:16:48,517 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 22:16:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:48,518 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:16:48,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:16:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:16:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 22:16:48,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:48,521 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:48,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:48,734 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 22:16:48,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:48,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028874481] [2020-07-21 22:16:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:48,764 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:48,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:16:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:16:48,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:49,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:49,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:49,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:16:49,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028874481] [2020-07-21 22:16:49,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:49,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:16:49,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663216479] [2020-07-21 22:16:49,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:16:49,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:16:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:16:49,165 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 22:16:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:49,341 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 22:16:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:16:49,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 22:16:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:49,346 INFO L225 Difference]: With dead ends: 56 [2020-07-21 22:16:49,346 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 22:16:49,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:16:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 22:16:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 22:16:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:16:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:16:49,378 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 22:16:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:49,379 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:16:49,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:16:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:16:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:16:49,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:49,385 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 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 22:16:49,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:49,586 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:49,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:49,586 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 22:16:49,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:49,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283002730] [2020-07-21 22:16:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:49,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:49,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:49,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:16:49,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 22:16:49,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:50,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:50,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:50,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:50,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:16:50,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283002730] [2020-07-21 22:16:50,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:50,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:16:50,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978410806] [2020-07-21 22:16:50,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:16:50,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:50,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:16:50,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:16:50,294 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 22:16:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:50,517 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 22:16:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:16:50,518 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 22:16:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:50,521 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:16:50,522 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 22:16:50,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:16:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 22:16:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 22:16:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:16:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:16:50,547 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 22:16:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:50,548 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:16:50,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:16:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:16:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 22:16:50,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:50,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 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 22:16:50,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:50,774 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:50,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:50,775 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 22:16:50,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:50,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574395186] [2020-07-21 22:16:50,777 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:50,813 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:50,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:50,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:16:50,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 22:16:50,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:51,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:51,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:51,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:51,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:51,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:16:51,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574395186] [2020-07-21 22:16:51,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:51,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:16:51,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180794400] [2020-07-21 22:16:51,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:16:51,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:51,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:16:51,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:16:51,462 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 22:16:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:51,676 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 22:16:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:16:51,677 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 22:16:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:51,679 INFO L225 Difference]: With dead ends: 66 [2020-07-21 22:16:51,680 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 22:16:51,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:16:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 22:16:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 22:16:51,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:16:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:16:51,694 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 22:16:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:51,694 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:16:51,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:16:51,695 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:16:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 22:16:51,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:51,697 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:51,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:51,900 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:51,901 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 22:16:51,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:51,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790294008] [2020-07-21 22:16:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:51,944 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:51,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:51,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:16:51,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 22:16:52,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:52,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:52,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:52,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:52,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:52,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:52,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:52,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 22:16:52,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790294008] [2020-07-21 22:16:52,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:52,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:16:52,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856325125] [2020-07-21 22:16:52,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:16:52,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:52,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:16:52,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:16:52,987 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 22:16:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:53,240 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 22:16:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:16:53,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 22:16:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:53,252 INFO L225 Difference]: With dead ends: 71 [2020-07-21 22:16:53,252 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 22:16:53,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:16:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 22:16:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 22:16:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:16:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:16:53,268 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 22:16:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:53,269 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:16:53,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:16:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:16:53,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 22:16:53,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:53,271 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:53,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:53,487 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:53,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 22:16:53,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:53,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676358016] [2020-07-21 22:16:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:53,538 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:16:53,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:53,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:16:53,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 22:16:53,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:54,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:54,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:54,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:54,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 22:16:54,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676358016] [2020-07-21 22:16:54,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:54,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:16:54,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684656649] [2020-07-21 22:16:54,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:16:54,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:54,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:16:54,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:16:54,586 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 22:16:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:54,850 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 22:16:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:16:54,851 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 22:16:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:54,853 INFO L225 Difference]: With dead ends: 76 [2020-07-21 22:16:54,854 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:16:54,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:16:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:16:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 22:16:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:16:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:16:54,885 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 22:16:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:54,886 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:16:54,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:16:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:16:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 22:16:54,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:54,889 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:55,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:55,094 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:55,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:55,095 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 22:16:55,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:55,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234329040] [2020-07-21 22:16:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:55,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:16:55,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:16:55,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 22:16:55,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:56,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 22:16:56,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234329040] [2020-07-21 22:16:56,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:56,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:16:56,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462027850] [2020-07-21 22:16:56,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:16:56,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:56,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:16:56,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:16:56,977 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 22:16:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:57,262 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 22:16:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:16:57,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 22:16:57,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:57,266 INFO L225 Difference]: With dead ends: 81 [2020-07-21 22:16:57,266 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 22:16:57,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:16:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 22:16:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 22:16:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:16:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:16:57,279 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 22:16:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:57,280 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:16:57,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:16:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:16:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:16:57,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:57,283 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:57,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:57,499 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:57,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:57,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 22:16:57,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:57,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778673945] [2020-07-21 22:16:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:57,577 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:16:57,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:16:57,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 22:16:57,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:58,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:58,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:58,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:58,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 22:16:59,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778673945] [2020-07-21 22:16:59,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:59,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:16:59,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704703330] [2020-07-21 22:16:59,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:16:59,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:59,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:16:59,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:16:59,127 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 22:16:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:59,493 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 22:16:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:16:59,494 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 22:16:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:59,497 INFO L225 Difference]: With dead ends: 86 [2020-07-21 22:16:59,499 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 22:16:59,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:16:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 22:16:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 22:16:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:16:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:16:59,546 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 22:16:59,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:59,547 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:16:59,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:16:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:16:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 22:16:59,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:59,553 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:59,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:59,768 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 22:16:59,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:59,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231104937] [2020-07-21 22:16:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:16:59,861 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:16:59,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:59,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:16:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 22:16:59,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:01,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:01,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:01,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 22:17:02,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231104937] [2020-07-21 22:17:02,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:02,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:17:02,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465207361] [2020-07-21 22:17:02,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:17:02,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:02,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:17:02,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:17:02,399 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 22:17:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:02,826 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 22:17:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:17:02,827 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 22:17:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:02,830 INFO L225 Difference]: With dead ends: 91 [2020-07-21 22:17:02,830 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 22:17:02,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:17:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 22:17:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 22:17:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:17:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:17:02,843 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 22:17:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:02,843 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:17:02,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:17:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:17:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 22:17:02,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:02,847 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:03,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:03,062 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:03,063 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 22:17:03,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:03,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512883680] [2020-07-21 22:17:03,064 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 22:17:03,164 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:03,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:17:03,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 22:17:03,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:04,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 22:17:05,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512883680] [2020-07-21 22:17:05,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:05,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:17:05,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238394468] [2020-07-21 22:17:05,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:17:05,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:05,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:17:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:17:05,827 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-21 22:17:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:06,219 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 22:17:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:17:06,219 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-21 22:17:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:06,225 INFO L225 Difference]: With dead ends: 96 [2020-07-21 22:17:06,226 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 22:17:06,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:17:06,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 22:17:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 22:17:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:17:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:17:06,253 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 22:17:06,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:06,254 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:17:06,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:17:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:17:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 22:17:06,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:06,261 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:06,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:06,465 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:06,465 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 22:17:06,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:06,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560685268] [2020-07-21 22:17:06,466 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 22:17:06,601 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:06,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:06,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:17:06,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 22:17:06,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:08,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:08,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:09,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:09,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:09,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:09,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:10,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:10,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:10,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:10,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:10,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 22:17:10,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560685268] [2020-07-21 22:17:10,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:10,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 22:17:10,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575802297] [2020-07-21 22:17:10,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:17:10,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:10,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:17:10,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:17:10,685 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-21 22:17:11,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:11,209 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 22:17:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:17:11,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-21 22:17:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:11,213 INFO L225 Difference]: With dead ends: 101 [2020-07-21 22:17:11,214 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 22:17:11,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:17:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 22:17:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 22:17:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:17:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:17:11,227 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 22:17:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:11,228 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:17:11,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:17:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:17:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 22:17:11,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:11,234 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:11,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:11,448 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:11,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-21 22:17:11,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:11,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003363573] [2020-07-21 22:17:11,450 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:17:11,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:11,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:17:11,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-21 22:17:11,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:13,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:13,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:14,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-21 22:17:15,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003363573] [2020-07-21 22:17:15,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:15,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 22:17:15,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785157818] [2020-07-21 22:17:15,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:17:15,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:15,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:17:15,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:17:15,850 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-21 22:17:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:16,370 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-21 22:17:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:17:16,371 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-21 22:17:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:16,374 INFO L225 Difference]: With dead ends: 106 [2020-07-21 22:17:16,375 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 22:17:16,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:17:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 22:17:16,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-21 22:17:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:17:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:17:16,395 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-21 22:17:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:16,398 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:17:16,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:17:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:17:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-21 22:17:16,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:16,406 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:16,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:16,621 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:16,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-21 22:17:16,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:16,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205632172] [2020-07-21 22:17:16,623 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 22:17:16,866 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:16,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:16,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:17:16,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-21 22:17:17,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:21,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:22,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:23,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:23,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:23,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:23,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-21 22:17:24,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205632172] [2020-07-21 22:17:24,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:24,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 22:17:24,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154808577] [2020-07-21 22:17:24,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:17:24,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:24,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:17:24,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:17:24,973 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-21 22:17:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:25,573 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-21 22:17:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:17:25,574 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-21 22:17:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:25,579 INFO L225 Difference]: With dead ends: 111 [2020-07-21 22:17:25,579 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 22:17:25,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:17:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 22:17:25,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-21 22:17:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:17:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 22:17:25,592 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-21 22:17:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:25,594 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 22:17:25,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:17:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 22:17:25,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 22:17:25,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:25,597 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:25,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:25,813 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:25,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-21 22:17:25,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:25,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063462886] [2020-07-21 22:17:25,815 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 22:17:26,043 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:26,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:26,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:17:26,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-21 22:17:26,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:29,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:29,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:29,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:30,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:31,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:31,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:31,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:31,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:31,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:31,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:31,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-21 22:17:31,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063462886] [2020-07-21 22:17:31,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:31,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 22:17:31,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050611245] [2020-07-21 22:17:31,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:17:31,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:31,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:17:31,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:17:31,946 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 24 states. [2020-07-21 22:17:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:32,583 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-21 22:17:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:17:32,583 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 418 [2020-07-21 22:17:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:32,587 INFO L225 Difference]: With dead ends: 116 [2020-07-21 22:17:32,587 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 22:17:32,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:17:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 22:17:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-21 22:17:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:17:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 22:17:32,602 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-21 22:17:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:32,603 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 22:17:32,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:17:32,603 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 22:17:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2020-07-21 22:17:32,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:32,610 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 46, 45, 45, 34, 34, 34, 34, 34, 34, 34, 34, 22, 22, 22, 22, 22, 22, 22, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:32,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:32,824 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:32,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:32,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1563866591, now seen corresponding path program 8 times [2020-07-21 22:17:32,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:32,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786255971] [2020-07-21 22:17:32,825 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 22:17:33,167 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:33,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:17:33,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2323 refuted. 0 times theorem prover too weak. 14314 trivial. 0 not checked. [2020-07-21 22:17:33,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:37,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:37,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:39,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:39,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:40,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:41,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:41,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:42,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:42,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:42,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:42,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:42,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:42,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:42,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:42,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2375 refuted. 0 times theorem prover too weak. 14262 trivial. 0 not checked. [2020-07-21 22:17:42,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786255971] [2020-07-21 22:17:42,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:42,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 22:17:42,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067711011] [2020-07-21 22:17:42,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 22:17:42,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:42,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 22:17:42,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:17:42,979 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 26 states. [2020-07-21 22:17:43,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:43,661 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-21 22:17:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:17:43,662 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 741 [2020-07-21 22:17:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:43,666 INFO L225 Difference]: With dead ends: 121 [2020-07-21 22:17:43,666 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 22:17:43,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1439 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 22:17:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 22:17:43,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-21 22:17:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 22:17:43,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 22:17:43,680 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 741 [2020-07-21 22:17:43,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:43,681 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 22:17:43,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 22:17:43,681 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 22:17:43,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 22:17:43,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:43,691 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 55, 55, 53, 37, 37, 37, 37, 37, 37, 37, 37, 27, 27, 27, 27, 27, 27, 27, 26, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:43,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:43,905 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2100501163, now seen corresponding path program 4 times [2020-07-21 22:17:43,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:43,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413056529] [2020-07-21 22:17:43,906 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 22:17:44,272 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:44,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:44,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:17:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2821 refuted. 0 times theorem prover too weak. 19575 trivial. 0 not checked. [2020-07-21 22:17:44,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:49,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:49,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:51,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:52,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:52,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:53,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:54,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:54,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:54,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:54,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:54,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:54,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2877 refuted. 0 times theorem prover too weak. 19519 trivial. 0 not checked. [2020-07-21 22:17:55,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413056529] [2020-07-21 22:17:55,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:55,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 22:17:55,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87264122] [2020-07-21 22:17:55,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 22:17:55,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:55,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 22:17:55,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:17:55,186 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 26 states. [2020-07-21 22:17:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:55,924 INFO L93 Difference]: Finished difference Result 126 states and 350 transitions. [2020-07-21 22:17:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:17:55,925 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 871 [2020-07-21 22:17:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:55,929 INFO L225 Difference]: With dead ends: 126 [2020-07-21 22:17:55,930 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 22:17:55,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1698 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 22:17:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 22:17:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-21 22:17:55,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 22:17:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 22:17:55,945 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 871 [2020-07-21 22:17:55,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:55,946 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 22:17:55,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 22:17:55,946 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 22:17:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-07-21 22:17:55,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:55,973 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 110, 110, 94, 74, 74, 74, 74, 74, 74, 74, 74, 55, 55, 55, 55, 55, 55, 55, 55, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:56,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:56,187 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:56,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:56,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1326645612, now seen corresponding path program 9 times [2020-07-21 22:17:56,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:56,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178086073] [2020-07-21 22:17:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:56,731 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:56,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:56,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 22:17:56,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6392 refuted. 0 times theorem prover too weak. 81780 trivial. 0 not checked. [2020-07-21 22:17:58,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:07,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:07,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:10,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:12,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:14,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:14,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:15,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:15,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:15,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:16,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:16,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:16,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:16,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6457 refuted. 0 times theorem prover too weak. 81715 trivial. 0 not checked. [2020-07-21 22:18:17,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178086073] [2020-07-21 22:18:17,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:17,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 22:18:17,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2850653] [2020-07-21 22:18:17,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 22:18:17,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:17,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 22:18:17,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:18:17,500 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 28 states. [2020-07-21 22:18:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:18,480 INFO L93 Difference]: Finished difference Result 131 states and 376 transitions. [2020-07-21 22:18:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:18:18,482 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1690 [2020-07-21 22:18:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:18,487 INFO L225 Difference]: With dead ends: 131 [2020-07-21 22:18:18,487 INFO L226 Difference]: Without dead ends: 127 [2020-07-21 22:18:18,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3392 GetRequests, 3333 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 22:18:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-21 22:18:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2020-07-21 22:18:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 22:18:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 22:18:18,503 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1690 [2020-07-21 22:18:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:18,505 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 22:18:18,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 22:18:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 22:18:18,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1433 [2020-07-21 22:18:18,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:18,524 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 92, 92, 87, 60, 60, 60, 60, 60, 60, 60, 60, 46, 46, 46, 46, 46, 46, 46, 41, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:18,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:18,738 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:18,739 INFO L82 PathProgramCache]: Analyzing trace with hash -37703149, now seen corresponding path program 5 times [2020-07-21 22:18:18,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:18,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608040175] [2020-07-21 22:18:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:19,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:19,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:19,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 22:18:19,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5319 refuted. 0 times theorem prover too weak. 56349 trivial. 0 not checked. [2020-07-21 22:18:20,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:28,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:28,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:36,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:37,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:38,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:38,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:38,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:39,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:39,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:39,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5389 refuted. 0 times theorem prover too weak. 56279 trivial. 0 not checked. [2020-07-21 22:18:40,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608040175] [2020-07-21 22:18:40,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:40,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 22:18:40,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521026376] [2020-07-21 22:18:40,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 22:18:40,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 22:18:40,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:18:40,273 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 28 states. [2020-07-21 22:18:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:41,403 INFO L93 Difference]: Finished difference Result 136 states and 404 transitions. [2020-07-21 22:18:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:18:41,407 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1432 [2020-07-21 22:18:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:41,412 INFO L225 Difference]: With dead ends: 136 [2020-07-21 22:18:41,412 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 22:18:41,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2875 GetRequests, 2816 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 22:18:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 22:18:41,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-07-21 22:18:41,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 22:18:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 22:18:41,431 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1432 [2020-07-21 22:18:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:41,433 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 22:18:41,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 22:18:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 22:18:41,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1990 [2020-07-21 22:18:41,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:41,471 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 112, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 64, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:41,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:41,672 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:41,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1412849447, now seen corresponding path program 10 times [2020-07-21 22:18:41,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:41,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441644743] [2020-07-21 22:18:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:42,356 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:42,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:42,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:18:42,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8137 refuted. 0 times theorem prover too weak. 114500 trivial. 0 not checked. [2020-07-21 22:18:44,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:48,420 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:18:48,526 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:18:48,634 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:18:48,741 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:18:48,850 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:18:57,896 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:18:58,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:58,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:04,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:08,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:08,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:12,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:13,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:14,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:14,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:15,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:15,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:15,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:15,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:15,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:15,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:16,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8217 refuted. 0 times theorem prover too weak. 114420 trivial. 0 not checked. [2020-07-21 22:19:17,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441644743] [2020-07-21 22:19:17,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:17,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 22:19:17,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882140134] [2020-07-21 22:19:17,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 22:19:17,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:17,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 22:19:17,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:19:17,552 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 30 states. [2020-07-21 22:19:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:18,760 INFO L93 Difference]: Finished difference Result 141 states and 432 transitions. [2020-07-21 22:19:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:19:18,763 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1989 [2020-07-21 22:19:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:18,767 INFO L225 Difference]: With dead ends: 141 [2020-07-21 22:19:18,767 INFO L226 Difference]: Without dead ends: 137 [2020-07-21 22:19:18,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3991 GetRequests, 3927 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 22:19:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-21 22:19:18,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-21 22:19:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 22:19:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 22:19:18,783 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 1989 [2020-07-21 22:19:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:18,785 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 22:19:18,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 22:19:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 22:19:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2050 [2020-07-21 22:19:18,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:18,821 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 124, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 60, 52, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:19,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:19,037 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:19,038 INFO L82 PathProgramCache]: Analyzing trace with hash 266934567, now seen corresponding path program 5 times [2020-07-21 22:19:19,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:19,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718688901] [2020-07-21 22:19:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:19,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:19,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:19:19,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8506 refuted. 0 times theorem prover too weak. 119697 trivial. 0 not checked. [2020-07-21 22:19:21,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:31,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:31,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:36,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:40,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:40,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:42,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:44,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:44,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:45,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:46,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:46,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:46,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:46,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:46,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:46,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8591 refuted. 0 times theorem prover too weak. 119612 trivial. 0 not checked. [2020-07-21 22:19:48,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718688901] [2020-07-21 22:19:48,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:48,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 22:19:48,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219962677] [2020-07-21 22:19:48,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 22:19:48,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:48,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 22:19:48,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:19:48,524 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 30 states. [2020-07-21 22:19:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:49,661 INFO L93 Difference]: Finished difference Result 146 states and 462 transitions. [2020-07-21 22:19:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:19:49,663 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 2049 [2020-07-21 22:19:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:49,668 INFO L225 Difference]: With dead ends: 146 [2020-07-21 22:19:49,668 INFO L226 Difference]: Without dead ends: 142 [2020-07-21 22:19:49,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4046 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 22:19:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-21 22:19:49,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-07-21 22:19:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 22:19:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 22:19:49,684 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 2049 [2020-07-21 22:19:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:49,686 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 22:19:49,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 22:19:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 22:19:49,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3680 [2020-07-21 22:19:49,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:49,777 INFO L422 BasicCegarLoop]: trace histogram [329, 329, 236, 236, 211, 164, 164, 164, 164, 164, 164, 164, 164, 118, 118, 118, 118, 118, 118, 118, 118, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:49,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:49,978 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:49,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:49,980 INFO L82 PathProgramCache]: Analyzing trace with hash -886096047, now seen corresponding path program 11 times [2020-07-21 22:19:49,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:49,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052192609] [2020-07-21 22:19:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:51,053 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:51,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:51,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 22:19:51,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16770 refuted. 0 times theorem prover too weak. 408925 trivial. 0 not checked. [2020-07-21 22:19:55,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:01,440 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:20:16,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:30,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:30,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:36,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:40,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:40,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:41,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:43,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:43,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:43,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:44,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:44,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:44,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:45,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16866 refuted. 0 times theorem prover too weak. 408829 trivial. 0 not checked. [2020-07-21 22:20:49,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052192609] [2020-07-21 22:20:49,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:49,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 22:20:49,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45201401] [2020-07-21 22:20:49,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 22:20:49,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:49,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 22:20:49,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:20:49,827 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 32 states. [2020-07-21 22:20:51,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:51,305 INFO L93 Difference]: Finished difference Result 151 states and 492 transitions. [2020-07-21 22:20:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:20:51,308 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3679 [2020-07-21 22:20:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:51,315 INFO L225 Difference]: With dead ends: 151 [2020-07-21 22:20:51,316 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 22:20:51,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7372 GetRequests, 7303 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 22:20:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 22:20:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2020-07-21 22:20:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 22:20:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 22:20:51,333 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3679 [2020-07-21 22:20:51,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:51,336 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 22:20:51,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 22:20:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 22:20:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3365 [2020-07-21 22:20:51,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:51,410 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 214, 214, 208, 143, 143, 143, 143, 143, 143, 143, 143, 107, 107, 107, 107, 107, 107, 107, 101, 79, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:51,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:51,611 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:51,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:51,613 INFO L82 PathProgramCache]: Analyzing trace with hash 147049693, now seen corresponding path program 6 times [2020-07-21 22:20:51,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:51,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358738570] [2020-07-21 22:20:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:52,681 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:52,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 22:20:52,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15526 refuted. 0 times theorem prover too weak. 332578 trivial. 0 not checked. [2020-07-21 22:20:56,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:01,508 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:21:02,630 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:21:02,732 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:21:02,844 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:21:02,961 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:21:03,070 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:21:03,171 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:21:16,238 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:21:16,342 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:21:17,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:26,465 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:21:27,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:38,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:38,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:46,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:48,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:50,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:51,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:51,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15628 refuted. 0 times theorem prover too weak. 332476 trivial. 0 not checked. [2020-07-21 22:21:56,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358738570] [2020-07-21 22:21:56,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:56,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 22:21:56,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750643977] [2020-07-21 22:21:56,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 22:21:56,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:56,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 22:21:56,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:21:56,182 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 32 states. [2020-07-21 22:21:58,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:58,057 INFO L93 Difference]: Finished difference Result 156 states and 524 transitions. [2020-07-21 22:21:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:21:58,064 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3364 [2020-07-21 22:21:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:58,069 INFO L225 Difference]: With dead ends: 156 [2020-07-21 22:21:58,070 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 22:21:58,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6741 GetRequests, 6672 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 22:21:58,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 22:21:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-21 22:21:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 22:21:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 22:21:58,090 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3364 [2020-07-21 22:21:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:58,092 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 22:21:58,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 22:21:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 22:21:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4616 [2020-07-21 22:21:58,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:58,336 INFO L422 BasicCegarLoop]: trace histogram [436, 436, 300, 273, 273, 218, 218, 218, 218, 218, 218, 218, 218, 136, 136, 136, 136, 136, 136, 136, 136, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:58,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:58,552 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:58,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:58,553 INFO L82 PathProgramCache]: Analyzing trace with hash -554675479, now seen corresponding path program 12 times [2020-07-21 22:21:58,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:58,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258629322] [2020-07-21 22:21:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:59,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:59,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:59,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 22:21:59,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 22920 refuted. 0 times theorem prover too weak. 665925 trivial. 0 not checked. [2020-07-21 22:22:06,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:09,873 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:22:10,890 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:22:12,758 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:22:12,862 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:22:12,982 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:13,097 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:14,473 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:22:14,593 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:22:14,716 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:22:14,837 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:22:16,923 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:22:17,058 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:22:17,198 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:22:17,335 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:22:17,470 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 22:22:17,602 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 22:22:17,724 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:22:17,833 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:22:17,949 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:22:18,054 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:22:18,159 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:22:37,300 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:22:37,404 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:22:37,526 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:22:37,636 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:22:39,912 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:22:40,030 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:22:40,148 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:40,261 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:41,805 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:22:41,930 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:22:42,064 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:22:42,193 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:22:42,323 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 22:22:42,442 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:22:42,556 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:22:42,672 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:22:42,788 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:22:42,895 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:22:43,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:56,153 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:22:56,257 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:22:59,475 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:22:59,597 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:22:59,723 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:59,848 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:59,967 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:23:00,079 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:23:00,185 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:23:00,290 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:23:01,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:20,433 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:23:20,642 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:23:20,747 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:23:21,649 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:23:21,761 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:23:21,881 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:21,997 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:22,107 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:23:22,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:28,542 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:23:32,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:37,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:41,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:41,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:44,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:46,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:48,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:49,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:49,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:49,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:49,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:49,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 23034 refuted. 0 times theorem prover too weak. 665811 trivial. 0 not checked. [2020-07-21 22:23:56,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258629322] [2020-07-21 22:23:56,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:56,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-21 22:23:56,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906077041] [2020-07-21 22:23:56,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 22:23:56,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:56,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 22:23:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 22:23:56,752 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 34 states. [2020-07-21 22:23:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:59,495 INFO L93 Difference]: Finished difference Result 161 states and 556 transitions. [2020-07-21 22:23:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 22:23:59,498 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 4615 [2020-07-21 22:23:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:59,506 INFO L225 Difference]: With dead ends: 161 [2020-07-21 22:23:59,506 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 22:23:59,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9245 GetRequests, 9171 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 22:23:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 22:23:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-07-21 22:23:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 22:23:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-21 22:23:59,528 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 4615 [2020-07-21 22:23:59,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:59,531 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-21 22:23:59,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 22:23:59,531 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-21 22:24:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9330 [2020-07-21 22:24:00,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:00,012 INFO L422 BasicCegarLoop]: trace histogram [846, 846, 625, 533, 533, 423, 423, 423, 423, 423, 423, 423, 423, 359, 266, 266, 266, 266, 266, 266, 266, 221, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:00,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:00,222 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:00,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1670319822, now seen corresponding path program 6 times [2020-07-21 22:24:00,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:00,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128772068] [2020-07-21 22:24:00,226 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:02,261 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:24:02,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 5179 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 22:24:02,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49554 refuted. 0 times theorem prover too weak. 2725114 trivial. 0 not checked. [2020-07-21 22:24:29,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:32,424 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:24:33,072 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:24:33,180 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:24:33,296 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:33,411 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:34,611 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:24:34,732 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:24:34,866 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:24:34,994 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:24:37,117 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:24:37,228 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:24:37,340 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:24:42,655 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:24:42,800 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:24:42,948 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:24:43,105 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:24:51,658 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:24:51,824 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:24:51,996 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:24:52,175 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:24:52,349 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 22:24:52,512 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 22:24:52,672 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:24:52,821 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:24:52,965 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:24:53,087 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:24:53,207 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:24:53,324 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:24:53,433 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:26:22,589 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:26:22,699 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:26:23,201 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:26:23,318 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:26:23,463 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:26:23,583 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:26:24,304 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:26:24,422 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:26:24,543 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:26:24,666 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:26:26,116 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:26:26,257 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:26:26,406 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:26:26,556 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:26:29,035 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:26:29,148 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:26:29,262 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:29,386 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:35,942 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:26:36,112 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:26:36,291 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:26:36,470 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:26:36,658 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 22:26:36,837 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 22:26:37,009 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:26:37,167 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:26:37,325 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:26:37,471 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:26:37,604 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:26:37,731 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:26:37,855 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:37,965 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:26:38,068 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:26:38,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:38,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:40,720 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:40,856 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:41,005 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:41,144 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:42,107 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:27:42,267 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:27:42,434 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:27:42,594 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:27:44,331 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:27:44,494 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:27:44,661 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:27:44,824 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:27:47,097 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:27:47,284 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:27:47,476 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:27:47,667 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:27:47,851 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:27:48,021 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:27:48,178 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:27:48,330 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:27:48,483 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:27:48,632 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 22:27:48,775 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:27:48,902 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:27:49,013 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 22:27:49,121 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 22:27:49,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:18,231 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:28:18,353 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:28:18,511 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:28:18,664 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:28:19,671 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:28:19,821 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:28:19,982 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:28:20,137 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:28:21,928 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:28:22,094 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:28:22,271 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:28:22,451 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:28:22,631 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:28:22,800 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:28:22,956 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 22:28:23,106 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:28:23,254 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 22:28:23,390 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:28:23,521 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:28:23,643 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:28:23,759 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:28:23,866 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:28:24,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:32,430 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:28:35,275 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:28:35,397 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:28:35,523 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:28:35,647 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:28:36,624 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:28:36,752 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:28:36,896 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:28:37,033 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:28:37,706 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:28:37,850 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:28:37,995 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:28:38,142 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:28:39,163 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:28:39,334 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:28:39,511 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:28:39,689 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:28:39,866 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:28:40,031 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:28:40,185 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:28:40,328 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:28:40,459 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:28:40,588 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 22:28:40,706 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:28:40,814 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:28:41,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:41,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:46,785 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:28:46,892 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:28:47,021 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:28:47,154 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:28:48,211 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:28:48,337 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:28:48,476 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:28:48,622 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:28:49,294 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:28:49,441 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:28:49,607 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:28:49,764 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:28:49,911 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:28:50,050 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:28:50,180 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:28:50,309 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:28:50,421 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:28:50,527 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 22:28:50,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:54,965 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:28:55,072 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:28:55,188 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:28:55,303 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:28:55,769 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:28:55,897 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:28:56,030 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:28:56,165 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:28:57,268 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:28:57,406 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:28:57,554 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:28:57,675 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:28:57,812 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:28:57,938 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:28:58,053 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:28:58,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:03,505 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:29:03,613 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:29:04,035 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:29:04,161 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:29:04,296 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:29:04,433 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:29:04,561 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:29:04,681 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 22:29:04,792 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:29:05,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:08,308 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:29:08,419 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:29:08,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:11,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:12,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:12,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:13,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:13,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:13,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:13,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:14,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:14,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49674 refuted. 0 times theorem prover too weak. 2724994 trivial. 0 not checked. [2020-07-21 22:29:45,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128772068] [2020-07-21 22:29:45,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:29:45,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 33 [2020-07-21 22:29:45,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863538922] [2020-07-21 22:29:45,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 22:29:45,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:29:45,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 22:29:45,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:29:45,553 INFO L87 Difference]: Start difference. First operand 95 states and 219 transitions. Second operand 33 states. [2020-07-21 22:29:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:29:49,797 INFO L93 Difference]: Finished difference Result 166 states and 590 transitions. [2020-07-21 22:29:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 22:29:49,806 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 9329 [2020-07-21 22:29:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:29:49,821 INFO L225 Difference]: With dead ends: 166 [2020-07-21 22:29:49,821 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 22:29:49,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18672 GetRequests, 18598 SyntacticMatches, 29 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=413, Invalid=1749, Unknown=0, NotChecked=0, Total=2162 [2020-07-21 22:29:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 22:29:49,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 95. [2020-07-21 22:29:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 22:29:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-21 22:29:49,856 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 9329 [2020-07-21 22:29:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:29:49,869 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-21 22:29:49,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 22:29:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-21 22:29:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8035 [2020-07-21 22:29:50,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:29:50,718 INFO L422 BasicCegarLoop]: trace histogram [755, 755, 515, 480, 480, 377, 377, 377, 377, 377, 377, 377, 377, 240, 240, 240, 240, 240, 240, 240, 240, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:29:50,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:29:50,935 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:29:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:29:50,939 INFO L82 PathProgramCache]: Analyzing trace with hash -644513672, now seen corresponding path program 13 times [2020-07-21 22:29:50,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:29:50,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002400844] [2020-07-21 22:29:50,940 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:29:53,128 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:29:53,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:29:53,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 4478 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 22:29:53,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:30:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2096160 backedges. 5713 proven. 43477 refuted. 0 times theorem prover too weak. 2046970 trivial. 0 not checked. [2020-07-21 22:30:18,051 INFO L328 TraceCheckSpWp]: Computing backward predicates...